Maffeis Works

Maffeis Engineering S.p.A. is today recogni-zed as one of the world few leading engine-ering consultancy firms in the field of Tension Membrane/Fabric structures and ETFE foil designs for long span structural applications such as Stadia covers and facade design (including retractable roofs/systems).

We understand that customer satisfaction is the key to a successful business and our per-formance has allowed us to grow continuou-sly since the start of our company. We serve all markets including Sport, Public, Commer-cial, Industrial, Bridge and Energy Technology.

Our constant efforts at improvement and development of the services that we offer has led to the now available CFD analysis for state of the art wind loading calculations for unconventionally shaped structures and heat transfer technology.

We are also developing technology in the Solar Power Plant field. Maffeis Engineering S.p.A., with its princi-pal design office near Bassano del Grappa in Northern Italy, was founded in 2000 and it consists of 22 specialized Engineers, 12 Architects, 6 Draftsmen and software deve-lopers.

Maffeis Engineering S.p.A. has recently joined Dar Group (one of the worlds leading A/E companies).

about us

membrane

02

Doha International stadiumJamarat BridgeMarseille VlodromeOpera LesnaPompidou Center

etfe

03

Akter Galaxy Apartment HotelChemnitz stationITE Singapore

retractable roof

04

Doha International stadiumTalima Mall Shopping Center

special steel structure

05

C.A. Arena Odense Multi purpose HallNAS ArenaTabiat BridgeVolgograd stadium

cable structure

06

Bird gardenKalifa stadiumMercedes Benz ArenaMilan Expo 2015

index - main projects

competences

01

Tensile StructureETFE CushionRetractable coveringSpecial steel structuresConcrete/wood structuresRenewable energies and Solar PlantsBuilding renovationPreliminary StudiesCFD analysis and building physicsSoftware Development

CFD

07

mechanical

08

Engineering & Consulting

Tensile Structures conception and design: this field represents our core business with many projects complited all over the world. The possibilities offered by this type of structures are very wide and we can offer to our clients many solutions for one single problem.

ETFE Cushion design: ETFE cushions are a lightweight alternative to glass roofs or facades. The cushions are pressurized with air to provide structural stability and the layers of ETFE can be coated to provide effective insulating values.

Retractable covering design: a retractable roof is an important opportunity to change the aspect of buildings such as stadiums, shopping malls and theaters and give them the possibility to be used also with bad weather conditions or to be opened to the sky in sunny days.

Special steel structures design: aircraft hangars, bridges, shopping malls, stadiums, steel coverings, pavilions, stages, amphitheatres.

Concrete/wood structures design: our work cover a large range of buildings from residential to office, commercial, industrial buildings.

Renewable energies and Solar Plants: our company is involved with the most important italian energy companies (ENEL and ENEA) in developing and making high efficiency solar plants in South of Italy.

Buildings renovation: with the continuous consumption of new land its becoming gradually more and more important renovate old buildings than build new ones. Thats why we decided to develop this type of work, managing several projects on historical buildings.

Preliminary Studies: We can provide a high quality package to clients including, preliminary analysis and preliminary drawings with render views to help visualize the proposed structure.

CFD Analysis and building physics: Our company continually improves our structural analysis software. Recent developments include the completion of CFD wind analysis software that replaces the need for wind tunnel testing of unusually shaped structures. In addition we can offer computerized thermal analysis of building envelope materials.

Software Development: Supported by engineers with a world wide experience on civil, industrial and stuctural issues, the software deve-lopment office makes software for building 3D surface and open/close environment computational models and develops software applica-tions which allows the drawing of architectural solutions with well balanced structural properties.Our software developers have big experience in Microsoft developing languages (C++, C#, WindowsForm, WPF) and in developing on CAD enviroment as Autodesk products (we are subscriber of Autodesk Developer Network), Rhinoceros and Google SketchUp.

our competences

al khor international stadium

General dataLocationType of structureClient

Scope of our work Architectural design

Technical dataMaterial

HeightSurfaceSeats

PTFE membrane, cables, steel77 m225.000 m2

65.000

Al Khor - QatarMembraneDAR al handasah consultantsDesign and buildDAR al handasah consultants

This project is one of the FIFA world cup sta-diums for 2022 in Qatar. This stadium will be one of the largest in the world covering a floor area of 96,900 m2. It includes many special features including a black PTFE cladding on the roof with black and white PTFE stripes on the facade. This is chosen to represent the traditional qatari tent with a black roof and black and white horizontal stripes on the facade.The interior of the stadium has a printed PVC liner to represent the interior of the qatari tent.The center portion of the roof features a folding retractable system. Construction is planned to start in late 2014.

285 m

34

0 m

77

m

04

01

05

02

03

01 render view

02 qatari tent interior

03 qatari tent

04 plan view

05 west elevation

04

01

03

05

06

02

07

01 steel structure - displacements

02 steel structure - stress

03 membrane - outer layer stress

04 structure - isometric view

05 membrane stress - isometric view

06 CFD analysis

07 main section

PAGINA 2INGEGNERIAconcezione strutturale del progettoimmagini straus con colori, analisi cfd, render struttura, schizzi, ecc.

ba - PTFE

b - tie back cable

c - roof truss

c

a

a

a

06 07

04

03

05

01 02

01 typical section

02 upper truss - render view

03 mast - anchorage navigator

04 mast - section

05 facade upper truss - detail

06 mast - detail

07 mast - render view

a b

c

d

a -printed PVC fabric membrane

b- main steel truss

c - facade upper truss

d - facade bottom truss

02

01

03

01 linear typical panel - plan view

02 rolls for liner - plan view

03 typical panel - render viewPAGINA 4DETTAGLI RIVESTIMENTOdisegni, viste 3d, immagini dettalgi se realizzati, dettagli, ecc

01

05

04

02 03

06 07 08

a

b

c

a - printed PVC fabric

b - shotgun

c - liner steel pipe

a

a - main steel truss

a

b

a - facade bottom truss

b - printed PVC fabric

01 roof membrane - navigator

02 roof membrane - typical panel

03 roof membrane - detail

04 roof membrane - section

05 typical panel - overview

06 typical panel - detail

07 typical panel - detail

08 typical panel - section

Jamarat Bridge

General dataLocationType of structureClientScope of our work Architectural design


Surface

PTFE / Fiberglass Membrane35.000 m2

Makkah - Saudi ArabiaMembraneTamimi GroupDesign and productionMaffeis Engineering S.p.A.

This structure consists of 4 open span structures of approximately 120m x 80m each. These structures provide shade to the millions of Muslim pilgrims that attend the annual Hajj in Saudi Arabia. The pilgrims throw stones at the jamrah pillars under the canopies as part of their stoning of the devil ritual. The PTFE membrane is supported by radial cables which connect to oval shaped steel structures at the high points of the four structures. These oval rings are in turn su-spended from external cables above the roof which connect to the top of steel perimeter masts. These large forces at the top of the masts are balanced by tie-back cables.

03

01 0201 aerial view

02 internal view

03 plan view

05 06

01 02 03 04

01 aerial view

02 internal view

03 plan view

01 FEM analysis

02 CFD analysis

03 CFD analysis

04 FEM analysis - fiber stress

05 3D model

06 3D model zoom


01 02

05

06

03 04

01 top column - FEM analysis

02 top column - construction

03 base column - construction

04 column detail

05 cables

06 cables and columns assembling

01 02

01 column - 3D model/details

02 columns - construction PAGINA 3DETTAGLI STRUTTURAdisegni, viste 3d, immagini dettalgi se realizzati, immagini analisi struttu-rale dettagli, ecc

01

02

05 07

06

03

04

01 view of the structure

02 cladding detail

03 membrane detail

04 membrane detail

05 view of the structure

06 membrane detail

07 cladding section

marseille vlodrome



Surface

PTFE, PVC, steel and aluminium60.000 m2

Marseille - FranceMembraneTaiyo EuropeDesign and productionSCAU, Atelier 9

This project consists of a PTFE membra-ne roof cladding tensioned over supporting steel arches. The large roof area required a large perimeter gutter system to handle peak rainfall intensities. This design was offered as a VE design to the original tendered roof which had a flat membrane roof which would have allowed snow to slide and accumulate at the low points with potential membrane stress and ponding issues at these low points. The new VE proposal of an undulating shape created by arches will prevent the snow from sliding to the low points. The cladding of the facades is also performed using PTFE mem-brane.

50

47

49

46

45

44

4342

41 40 3938

37

36

35

34

33

32

3130

29

2827

48

25

24

98

7

6

5

4

3

2

10 1112

1314

15

16

17

18

19

20

21

2223

59

58

5756

55

5453

52

A

B

C

D

E

F

G

H

J

02

0101 construction - frontal view

02 plan view

25

1 m

258 m

01 02 03

0605

04

01 membrane - analysis

02 membrane - displacements

03 membrane - wind pressure

04 steel/membrane - analysis

05 facade typical model

06 3D model


03

06

01

04

07

02

05

08 09

01 facade - typical model

02 facade - construction

03 arches - section

04 CHS 60 connection - detail

05 plate connection - detail

06 arches - construction

07 CHS 60 connection - detail

08 plate connection - detail


01 02 03

04

05

01 panels - external view

02 panels - internal view

03 clamping - detail

04 ultralock - detail

05 membrane - corner detail

a - fabric

b - ultralock

c - clamping tube

a

b

c

35 m

105 m

45 m

105 m

opera lesna-sopot

01 inside view - picture

02 south front view

03 plan view

General dataLocationType of structureClientScope of our workArchitectural design


HeightSurfaceInnerOuterSeats

PTFE, PVC membrane, steel35 m6000 m2

PVC 1500 m2

PTFE 4500 m2

4400

Sopot - PolandMembraneTaiyo EuropeDesign and productionJ. Szczesny, A. Goebiewski,W. Rosowski

This large PTFE canopy provides weather protection to the attendees to the performan-ces at this location in the woods in Sopot Poland. The canopy is supported by a large central arch structure. Cables are connected to this arch and to the perimeter steel colu-mns. The columns are stabilized by tie-back cables. Edge cables span between the co-lumns to support the edge of the membrane panels. The membrane cladding is connected to the cables and steel arch. Membrane clo-sures are added to provide a weather proof system.

02

01

03

06

07

b

a

c

d

01 main arches - construction

02 FEM analysis - primary structure

03 FEM analysis - secondary structure

04 FEM analysis - membrane force

05 structure - render view

06 CFD analysis - simulation

07 CFD analysis - computational wind tunnel

a main steel arches

b catwalk pipes

c steel cables

d steel columns

05

01

02 03 04


01 anchor detail - construction

02 FEM analysis - ancor detail

03 cables - column connection - construction

04 FEM analysis - cables - column connection

05 anchor detail - isometric view

06 anchor detail - front view

07 anchor detail - plan view

08 cables - column connection - isometric view

09 cables - column connection - front view

10 cables - column connection - plan view

06

09

01

05

02

07

03

08

04

10

04

a

c

b

d e

a

bc d

a

a

b

c

d

e e

d

01 cable clamping detail - picture

02 border clamping detail - picture

03 valley cable clamping detial - section

04 border cable clamping detial - section

05 corner clamping detail - plan view

06 corner clamping detail - picture

a valley cable

b ss metal strap

c PTFE closure flap

d double aluminium profile - EPDM keder

e PTFE membrane

a border cable

b ss metal strap

c double aluminium profile - EPDM keder

d PTFE membrane

a border cable

b valley cable

c column

d reinforced PTFE membrane

e PTFE membrane

01

03

02

05 06

centre pompidou

01 picture

02 section view

03 plan view

General dataLocationType of structureClientScope of our workArchitectural design


HeightSurface

PTFE / fiberglass membrane38 m8000 m2

Metz - FranceMembraneTaIyo EuropeDesign and productionShigeru Ban

The museum of modern and contemporary art designed by Shigeru Ban located in Metz France, is one of the new symbols of the contemporary architecture in Europe. With a surface area of 8000 m2, the roof structure is composed of over 16 kilometers of glued and laminated timber, that intersect to form hexagonal wooden units resembling the cane-work pattern of a traditional chinese hat. The PTFE membrane cladding provides a perfect internal light ambiance and spectacular nightime images.

37 m

105 m

90 m02

01

03

01 FEM analysis - membrane stress with snow load

02 FEM analysis - membrane stress with wind load

03 render view

04 membrane sim line - isometric view

05 wood structure - isometric view

06 membrane clamping phase - construction05

01 02

06

03 04


01 steel upstand detail

02 FEM analysis - detail



05 steel upstand - isometric view

06 steel upstand - isometric view


08 upstand detail - construction

09 upstand - construction

a tension system bars

b upstand

c screw

d wood beam

a

b

c

d

06

02

01

03 04

0705

08 09

01 border clamping detail - construction

02 beam clamping detail - construction

03 border clamping - typical section

04 beam clamping detail - isometric view

05 corner clamping detail - construction

06 border clamping - construction06

a aluminium profile

b reinforce

c tension system bars

d upstand plate

05

a PTFE skirt

b main fabric

c edge external beam

d wood perimetral beam

e keder

f rope

a b

c

d

f

e

ab

cd

01

04

02 03

akter galaxy apartment hotel


Technical dataMaterialHeightSurface

ETFE & steel95 m3.000 m2

Sochi - RussiaETFETaiyo EuropeDesign and productionE.Epifanich-M.Shovich

This high profile project constructed for the Sotchi Winter Olympics of 2014, consists of an ETFE roof over a hotel atrium. The ETFE cushions are supported on a steel truss framework. The varying geometry of the perimeter support system including horizontal and vertical slopes and curves was the most difficult aspect of the project, but once this geometry was finalized with the project archi-tect the project proceeded smoothly and the cushion patterning provided a very satisfac-tory final aspect.

01 render view

02 building site picture

03 lateral view

04 plan view04

02

98

m

25

m

85m03

01

a- upper arch

b- lower arch

c- vertical support

d- braced cross rod

e- braced streight rod

f - border

g- border support

h- sliding connection

i- pin connection

0403

01

05 06

a

b

cd

e

f

f

g

g

h

i

d

e

02

01 installation

02 structure typical arch isometric view

03 structural analysis

04 structural analysis - arches

05 FEM analysis - displacement verification

06 arches on site


01

02

04

05

03

01 typical arch - front view

02 typical connection - front view

03 FEM analysis - typical connection

04 typical connection - render view

05 typical arch - render view

a - pin

b - ETFE layer printed

c - ETFE layer clear

d - border pipe

a

b

c

d

01 02 03 04

05

06

According to EN 1990, the working life of the structure has

been taken equal to 50 years.

The ETFE cushions are composed by three layers.

The material resistance is tested by mono-axial sample test.

It takes into account the duration of the external load, the

reduction of resistance of material due the pollution and de-

gradation effect, the effect of temperature on the membrane

and the imperfection of the manufacture.

ETFE mechanical properties:

Ethylene tetrafluoroethylene is a fluor polymer plastic. The

thickness of the layer used is 250 m for the upper and lower

layer; 100 m for the middle layer.

Mechanical characteristics:

Estress=800 N/mm2

fuk, 5% fractile= 52 N/mm2

fuk seams, 5% fractile= 32 N/mm2

The middle layer hasnt any pretension, but it own curvature

gives by a difference of inner pressure equal to 50 Pa.Therefo-

re in standard situation the inner pressure is equal to 300 (and

350) Pa; in case of snow it is equal to 1100 (and 1050) Pa.

01 typical cladding detail - inside render view

02 aluminium profile - typical section

03 aluminium profile - construction

04 ETFE cushion - construction

05 cushions - plan view

06 cushions - construction

chemnitz station

01east facade - picture

02 ETFE cushions - detail picture

03 north facade - front view

04 east facade - front view

General dataLocationType of structureClientScope of our work

Technical dataMaterialHeightSurfaceInnerOuter

ETFE - PTFE mesh15 m6000 m2

PTFE mesh 2000 m2

ETFE 4000 m2

Chemnitz, GermanyETFETemme ObermeierDesign and production

This project consists of exterior cladding of the facades of the station with ETFE cushions. And of cladding the interior facades with PTFE panels. Development of the clamping system and support system was complicated by the lack of support for the structural elements on the faade interior and the need to keep the structural elements to a maximum sizing to accomplish the architectural goals. The situa-tion was resolved using hanging cables that both provided support for the weight of the frames but also provided some resistance to the internal wind loads within the station. Inter-nal wind loads because of course the station is open to the elements on one side.The external clamping system used and the high quality cushion patterning provided a ple-asing external appearance.

04

90 m

15 m

03

01 02

155 m

01 FEM analysis - ETFE external layer

02 FEM analysis - PTFE mesh

03 FEM analysis - aluminium profile displacement

04 steel primary and secondary structure - render view

05 plates for the aluminium connection to the primary

structure

06 aluminium connection system

The loads analysis of the ETFE cushions, of the PTFE mesh panels and the aluminium profiles needs to the main structure engineers to calculate the structure and to find the best points to connect the cladding structure to the primary structure.

04

01

02 03

05

06


01facade system - render view

02 typical PTFE panel - render view

03 inside view - building site picture

04 PTFE clamping system - typical detail

05 PTFE clamping detail - picture

a PTFE mesh

b aluminium profile

c connection plate

d primary steel structure

0201 03

04 05

a b

c

d

01 facade system - render view

02 typical ETFE cushion - render view

03 roof-facade corner - typical section

04 ETFE cushion clamping system - typical detail

05 roof-facade corner - picture

06 corner facade - building site picture

a ETFE cushion

b EPDM

c aluminium profile

d U profile

e connection system

f primary structure

(not our scope of work)

01 02 03

05 06

04

a b c

d

e

f

ITE singapore



ETFE, steel16 m6.000 m2

Singapore ETFETaiyo EuropeDesign and productionRSP ArchitectsPlanners & Engineers

This new college development in Singapore promotes good design and environmental awareness. The ETFE canopy links the buil-ding blocks together while providing shade to the outdoor sports areas and inspiration spine. The continuous linkage between the school blocks and workshop blocks symboli-se that education is a continuous and lifelong learning process. The ETFE with leaf imprints allows for only 50% of natural daylight to dif-fuse through, whilst sheltering the inspiration spine from the elements. This double-layered ETFE pillow system provides heat insulation and reduces harmful UV from penetrating to the circulation space below.

01 top view

02 inside view

03 masterplan

245 m

10

0 m

03

01 02

01 3D model Amphitheatre

02 FEM analysis - wind suction

03 FEM analysis - wind compression

04 3D model Forum

05 FEM analysis - wind suction

06 FEM analysis - wind compression

07 amphitheatre - construction

08 forum - construction

07 08

01 02

03 04 05 06


top layer clear

bottom layer printed

01 FEM analysis - border beam

02 FEM analysis - aluminium extrusion section

03 typical alu profile

04 cushion concept

05 construction

04

a - cushion

b - alu profile

c - keder

d - stainless bolt M10

01

02 03

05

b

a

c

d

01 forum - top view

02 forum - cushion detail

03 general view

04 covering detail

05 forum - bottom view

01

03

02

04

05




HeightSurface

PTFE / fiberglass membrane, steel77 m14.880 m2

Al Khor - QatarRetractable roofDAR al-handasah consultantsDesign and buildDAR al handasah consultants

This project is one of the FIFA world cup sta-diums for 2022 in qatar. this stadium will be one of the largest in the world covering a floor area of 96,900 m2. It includes many special features including a black PTFE cladding on the roof with black and white PTFE stripes on the facade. This is chosen to represent the traditional qatari tent with a black roof and black and white horizontal stripes on the faca-de. The structure also includes a large (160m x 98m) retractable roof, several options were considered and the final option chosen by the client was a folding system. The moving steel trusses will ride on rails that are supported from the primary trusses that run in the long direction of the roof. These trusses are sup-ported from structural towers that are outside the seating bowl.

01 render view

02 roof closed - plan view

03 roof open - plan view

02 03

01

al kohr international stadium retractable roof

93 m

16

0 m

01 retractable roof - stress

02 retractable roof - displacements

03 retractable roof - fabric verification

04 retractable roof open - wind pressure

05 retractable roof open - navigator

06 steel structure - isometric view

07 steel structure - section

01 02 03 04

05 06

07


01 retractable roof closed -

plan/front view

02 retractable roof closed - render view

03 navigator

04 retractable roof open -

plan/front view

05 retractable roof open - render view

06 main section - east/west

07 main section - north/south

open/closed roof

01

04

02

05

06

03

07

01 typical section

02 main truss - detail

03 main truss - section

a - PTFE fabric membrane

b - sefar tenara fabric

c - printed PVC full fabric membrane

d - engine

a

c

c

b

d

01

02 03

01 typical panel - overview


03 closign panel - render view

04 closign panel - render view



07 typical panel - clamping detail

08 clamping detail - plan view

a - fixed PTFE white fabric

b - sefar tenara fabric

a - fabric

sefar tenara fabric

a

b

a

fixed panel PTFE

white fabric

01 02

06

05

07 08

04

03

talima mall



Gore Tenara/Steel13 m6.000 m2

Athens - GreeceRetractable roofTaiyo EuropeDesign and productionArchicon-Ltd

This large folding roof style retractable system is installed over a shopping mall to provide the benefit of the open air during nice weather and a weather proof roof in inclement weather. This design is the 4th generation of this style of roof with the lessons learned from earlier smaller projects fully implemented in this design. Steel arches support the folding PVC membrane and these arches are moved along the rails by electrical motor driven chains. A separate mechanical tensioning system provides full tension to the membrane after the roof is fully extended. This tension al-lows the roof to be fully resistant to all normal design loads during full extension.

02

01

03

01 aerial view

02 plan view

03 front view

72 m

37

,5 m

13

m

06

03

01

02

04

05 07

01 steel structure - steel stress

02 steel structure - global displacement

03 3D model

04 CFD analysis - pressure distribution

05 CFD analysis - isometric view

06 CFD analysis - velocity vectors

07 CFD analysis - velocity stream lines


03 0504

01

02

01 steel column - lateral/front view

02 steel columns - construction

03 steel column - sections

04 steel column - isometric view

05 steel columns beams - construction

2 22 2

1 1 1 1

01

0503

02

04

01 retractable roof - sections

02 arches - section

03 retractable roof - moving system detail

04 retractable roof - mechanical cart detail

05 membrane - roof open

C.A. - arena odense



PVC18 m8.000 m2

Odense - DenmarkSpecial steel structureTaiyo EuropeDesign and productionMikkelsen Arkitekter

This project is the roof covering for a Velodrome in Odense, Denmark. The roof consists of 9 PVC membrane panels supported by 8 structural steel trusses. The trusses are unusual since their center lines are not vertical but are tilted off the vertical to match the slope of the roof. This architectural feature, made the design and especially the installation of the trusses more complex. The longer trusses are 85m in length. The thrust force in the arched trusses is balanced with a Macalloy bar.

02 03

120 m

85

m

01

18

m

01 render view

02 plan view

03 front view

0605

04

02

03

01

01 toroid - arches concept

02 FEM analysis - fabric deforming

03 FEM analysis - fabric displacement

04 3D model

05 arches - 3D model



05

01

07

02 03 04

08

06

01 FEM analysis - diablo connection

02 diablo connection - render view

03 column - FEM analysis

04 column - render view

05 diablo conncetion - construction

06 column - front view

07 diablo connection - detail

08 column - details

01

03 04

02

01 concrete connection - FEM analysis

02 concrete connection - render view

03 concrete connection - plan/front view details

04 concrete connection - construction

03

02

04 05

01

01 3D model

02 corner with closure flap - typical detail

03 closure around main pipe - typical section

04 closure flap - section

05 clamping - typical section

a

b

ca - keder 12 EPDM

b - clamping plate

c - main fabric PVC Type IV

d - reinforcement PVC Type IV

d

multipurpose sport hall




Surface

Glass, aluminium, steel50.000 m2

Doha - QatarSpecial steel structureDAR al andasahconsultantsFull designDAR al handasah consultants

The structural system can be described as a diagrid structure. Conventional diagrid structures constructed in the past have been primarily vertical buildings. diagrid (a port-manteau of diagonal-grid) is a design for con-structing large buildings with steel that creates triangular structures with diagonal support beams. The advantage of this system is that it requires less structural steel than a conventio-nal steel frame. The outward arching external cloves of the building with an internal irregu-lar dome are all supported using the diagrid structural system. There is a steel ring beam at the perimeter of the irregular dome that supports the internal portion of the roof. This ring beam is supported in turn by vertical steel columns at approximately 12 meter spacing. The steel columns are supported at the level 4 concrete. The outer perimeter of the structu-re is supported on the top of the concrete podium structure. The primary structural steel system will support an overlay of the secon-dary structure consisting of aluminium extru-ded sections that will provide support for the cladding system of a combination of triangu-lar aluminium sandwich panels and triangular shaped glass panels that will be nominally 2 meters x 2 meters.

51

m

188 m

288 m

02

01

03

01 render view

02 plan view

03 front view

01

07

06

0402 03

05

01 render view

02 plan view

03 front view

01 steel structure - global stress result

02 steel structure - global stress result

03 FEM analysis - pressure isolines

04 FEM analysis - velocity vectors

05 steel structure - section

06 steel structure - construction

07 3D model

a - top column steel ring

b - concrete columns

c - dome

a

b

c


0201

04

06

05

07 08

03

01 pipe connection - FEM analysis

02 pipe connection - render view

03 concrete connection - render view

04 pipe connection - isometric view

05 pipe connection - construction

06 pipe connection - front view

07 concrete connection - typical section

08 oncrete connection - typical detail

01

02

03

01 cladding panels - render view

02 cladding panles - render view

03 cladding panles - assembling

LocationType of structureClient



HeightSurface

Dubai - UAESpecial steel structureDar Al-Handasah ConsultantsFull designDar Al-Handasah Consultants

Steel structure aluminium and glass cladding31 m26.000 m2

This structure will house a volley ball court and provides for multi-uses. This elliptical dome structure consists of radial steel beams connecting the edge of the structure to the center. There are some intermediate columns to provide support for the dome outside the court and spectator areas. The shape of the building provides that the bottom edge of the structure returns on itself and this inefficient structural feature was mitigated by installing a ring truss at the point of the maximum diameter (some meters above the floor level). Another interesting feature of the structure is the cladding which features alternating pat-terns of aluminium panels with glass panels including spandrel panels and pure glass panels.

NAS - arena dubai

170 m1

40

m

31

m

01 render view

02 plan view

03 front view

01

02 03

01 FEM analysis - buckling modes

02 FEM analysis - displacement

03 CFD simulation result

04 CFD post processing

05 3D model internal part

06 3D model external part

07 3D model

01

02

03

05

06

07

Description of structural design.

An in-house CFD has been performed on the structure to

determine the correct wind loads to be applied. The structure

was analyzed with Straus 7 and SAP 2000 software. The

large irregular openings and the cantilevering effect of the

shape at the perimeter of the structure were the major diffi-

culties to be overcome from a structural point of view. These

conditions were solved by adding the ring truss at the widest

point of the structure.

MAINENTRANCE

0.53 -0.03 -0.17 -0.37 -0.47 -0.37 -0.17

0.82VERTICAL WALL

04

a

b

c

a dome

b columns

c compression ring

c

a

01 base plate - FEM analysis

02 base plate - detail

03 base plate - render view

04 typical steel connection

05 typical column - render view

06 typical column connection

07 connection plate to dome

01

02

03

04

06

05

07

01 external skin concept

02 render view

03 elevation with main panels division

04 secondary panels scheme

05 operable panel detail

06 glass typical detail

01

02

03

04 05 06

tabiat bridge

01 construction

02 plan view

03 front view


Technical dataMaterialLength

Steel270 m

Teheran - IranSpecial steel structureDiba ArchitectureProduction designLeila Araghian -Diba Tensile Architecture

Tabiat Bridge, located in north of Tehran, is the largest pedestrian bridge of Iran. This bridge is 270 meters long spanning over a major highway connecting two popular parks to each other. It is a 3 dimensional complex truss sitting on 3 tree shaped colu-mns and includes of 3 levels. The first level has a caf-gallery and a small restaurant. The second level is mainly for people who are crossing from one park to the other park, they may be walking, biking, skating or riding on a horse carriage. The 3rd level includes of 2 platforms which only exist on top of the columns, they are the view points to stay and enjoy the surrounding views. all along the bri-dge there are stairs and ramps that connect all the levels to each other. This project will be open to public in 2014 and is going to be one of the landmarks of Tehran.

02 03

01

01 steel stress

02 steel stress

03 wind velocity vectors on

lengthwise cutting planes

04 wind velocity vectors on

lengthwise cutting planes

05 3D model

06 construction

0401 02 03

05 06


01 bottom view

02 base column - contruction

03 lateral view

04 bottom view

05 overview05

01

03

04

02

01 base column - perspective view

02 base column - enlargement from the top


04 base column - section

05 base column - front view


01

04

02 03

05 06

volgograd stadium



HeightSurfaceSeats

PTFE, polycarbonate, stainless steel mesh, structural steel45 m55.000 m2

45.015

Volgograd - RussiaSpecial steel structureArena Project InstituteFull designArena Project Institute

Volgograd Stadium will be one of the stadiu-ms for the FIFA 2018 world cup in Russia. The stadium roof consists of a tensioned cable structure supporting a PVC membrane cladding, with a polycarbonate panel cove-red inner ring. The tension forces of the radial cables are balanced by a structural steel compression ring, the compression ring is in turn supported by concrete columns. The massive tension in the lower radial cables provides the support to the dead load of the inner ring. The inner ring consists of two cable tension rings that support a steel platform which in turn supports the polycar-bonate panels. This internal balance of high forces between the tension rings and the compression ring provides the stiffness to the roof which permits the roof to resist snow and wind loads. The outer roof of the Foyer consists of structural steel trusses supporting polycarbonate panels.The faade will consist of a structural steel framework supporting stainless steel mesh cladding.

29

0 m

290 m

45

m

01 general render view

02 roof plan

03 elevation

04 section

02

01

03

04

stainless steel mesh facade

polycarbonate

membrane

ab

c

e

f

g

di

l

h

m

n

p

r

r

h

l

d

a

q

i

g

g g

o

m

n

p

01 FEM analysis - steel stress

02 FEM analysis - membrane stress

03 roof scheme - isometric view

04 steel structure - render view


06 steel structure - section05

01

02 03 04

06

a steel cantilever

b upper tension ring

c lower tension ring

d steel arch

e upper radial cable

f lower radial cable

g vertical structural element

h foyer beam & cables

i compression ring

l concrete column

m facade top beam

n vertical facade steel element

o oblique facade steel lement

p facade basament

q catwalk

r bleachers

a facade top beam

b compression ring

c upper tension ring

d lower tension ring

e cross cables

a b

e

c

d

e e

e

01 facade main structure

02 detail - render view

03 detail - front view

04 elevation

05 detail - pin connection - section

01

04

02 03

05

a - main membraneb - clamping elementc - ss strap for clamping elementd - radial cablee - aluminium clamping elementf - ss bolt

e

f

01 typical membrane panel - isometric view

02 typical membrane connection radial cable -

plan view and sectionn

03 clamping detail

04 corner connection to compression ring

(without the clousure flap) - render view

05 corner connection to compression ring

(without the clousure flap) - paln view and section01

02

04

0503

a

b

d

c

a - gutter

b - polycarbonate panel

c - aluminium profile

d - closure aluminium profile

b

a

c c

b

d

b

a - policarbonate transparent

b - polycarbonate bright blue - ral 5015

c - gutter

d - fabric

a

b

c

d

01 polycarbonate - plan view

02 materials layout - render view

03 polycarbonate - closure detail

04 polycarbonate - cross section

05 polycarbonate - longitudinal section

a 03

01

05

04

02

a - cable outside the mesh

b - cable inside the mesh

c - stainless steel mesh

a - spring for tensioning

b - cable

c - swaged fitting with thread

a

b

c

a

b

a

b

c

01 facade steel mesh - front view

02 facade steel mesh - clamping detail

03 facade steel mesh - cladding and clamping detail

04 facade steel mesh - cladding and clamping detail

05 facade steel mesh - section

01

03

02 04 05

bird garden

49

m

400

m

150 m

04

400 m

01 site view - construction

02 site view - construction

03 plan view

04 frontal view



Steel, stainless steelVariable (35/50 m)62.000 m2

Lavizan - Tehran - IranCable structureDiba ArchitectureDesign and productionDiba Architecture

Lavizan aviary is located northeast of Tehran. The structure will provide an enclosure for aquatic birds. It is located in a scenic area and the 62,000 m2 area enclosed includes a small lake with tributary streams. The aquatic birds aviary is a cable net structure, made up of a 2x2 meter grid for the main cables and a stainless steel mesh with 2525 mm openings. the cable net is supported by large steel masts.The double high point shape is selected for this structure, which is the most stable form for such large span, so in addition to its aesthetic beauty it is also economically justi-fiable.

03

01 02

35

m

06

01 FEM analysis - cable net displacements

02 3D moderl

03 CFD analysis - wind velocity vectors

04 CFD analysis - wind velocity streaml ine

05 installation cables - section

06 installation cables - section

07 installation - ring lifted

01 02

03

04

05 07


01 FEM analysis - main mast steel stress

02 main mast - detail

03 typical column - detail

04 FEM analysis - typical column

05 FEM analysis - main mast top ring

06 main masts - construction

07 typical column - base plate detail

01

05 06

02

03 04

07

01 clamping - navigator

02 clamping - render view

03 clamping - valley cables

04 clamping - mesh cables

05 cable mesh detail on flat areas

a - border cables clamping

b - top mast cables clamping

c - valley cables clamping

d - mesh cables clamping

a

d

b

c

a

b

c

a - main cable

b - cable net

c - steel net

01

02

05

03

04

khalifa stadium

01 render view

02 isometric view

03 plan view

General dataLocationType of structureClientScope of our work

Technical dataMaterialHeightSurfaceSeats

PTFE membrane/steel100 m44.000 m2

50.000

Doha - QatarCable steel structureDARFull design

This project is one of the FIFA world cup stadiums for 2022 in Qatar. This existing west stand roof for this stadium was constructed in 2005. It will be partially demolished (the mem-brane and cables will be removed) and the steel compression rings and support structure will remain. New compression rings (upper and lower) will be built on the east side con-necting to a common foundation with the west side compression rings. a new saddle shaped tensioned cable roof will be constructed to support a PTFE membrane roof that will cover the entire stadium. A single tension ring will be connected with radial cables to the lower compression ring and with hanging cables to the upper compression ring.Construction is planned to start in late 2014.

02270 m

260 m

01

03

05

01 02 03 04

06

a upper compression ring

b lower compression ring

c column

d column anchor

e tension ring

e

a

b

c

d

01 steel structure - general view

02 steel structure - stress analysis

03 membrane - stress analysis

04 CFD analysis - wind velocity stream line



01 anchor detail - isometric view

02 anchor detail - front view

03 anchor detail - section

04 FEM analysis - displacement

05 cables connection - plan view

06 cables connection - render view

0201 03

05 06

04

01

02

04

02

03

01 typical tension ring connection - plan view

02 radial cable - typical section

03 stadium render view

04 isometric view

11

1,4

m

178,6 m

47

m

stuttgartmercedes benz arena

01 view - construction

02 plan view

03 section



HeightSurfaceSeats

PVC membranesteel, cables47 m6.000m2

60450

Stuttgart - GermanyCables structureTaiyo EuropeDesign and productionSchlaich Bergermann und partner gmbh stuttgart

This project consists of an extension to an existing PVC roof. The new section of PVC roof cantilevers from the old roof and provides coverage to new seating areas added below. There was sufficient reserve in the original de-sign to permit the additional load of the new extension. Flying masts were affixed to the existing ring cable nodes and braced through radial cables to the existing upper compres-sion ring. A new ring cable supports the new edge of the fabric.

01

01

03



03 FEM analysis - membrane deflection

04 typical section

05 membrane . main section

06 3D model

03

0605

01

04

02


01 typical arch - section

02 arch detail - section


04 typical clamping detail

05 FEM analysis - aluminium

square pipe profile stress

06 plate detail - construction

07 plate - isometric view06

07

03

05

02

01

04

01 panel plan view

02 panels installation - top view

03 typical panel - isometric view

04 typical corner detail

05 panels installation - top view

a- panel type A

b- panel type B

c- panel type C

a

c

b

01

02

03

04 05

milan expo 2015


Technical dataMaterialSurface

PVC, ETFE, steel82.200 m2

Milan - ItalyCable structureTaiyo EuropeDesign and productionHerzog - De Meuron

This tensile structure consists of fabric shade and rain protection for the main aisles for the World Expo in Milan scheduled for 2015. The main thoroughfare is 35m wide and 1 kilometer long. The structure consists of a suspension bridge style with upper and lower cables connected by tensioned tie cables. The upper and lower cables are connected to the masts on each side and the masts are in turn supported by tie-back cables connected to concrete foundations. Steel strut elements span between the adjacent lower cables and also between the adjacent upper cables. This design provides a very stable structure which supports the PVC membrane cladding.Smaller structures of ETFE cladding are provided for some secondary structures.

1056 m

24

5 m

02

0101 construction

02 masterplan

02

07

05

03

01

06

04

01 steel structure - stress result

global displacement

02 membrane mockup - vertical displacements

03 sloped columns - construction

04 steel structure - construction

05 membrane mockup - level curves

06 3D model

07 typical section

a - upper cable

b - lower cable

c - column

d - sloped column

e - steel rods

f - hangers

a

b

c d

e

f


01

05

06

02 03 04

07 08

01 base plate - FEM analysis

02 base plate - contruction

03 top plate - FEM analysis

04 top plate - render

05 base plate - detail

06 base plate - render

07 top plate - detail

08 top plate - contruction

PVC

Cable edge

Reinforcement

PVC FR 100 Type II

CHS 193.7

c

a - CLAMP EN 1.4302

b - cable edge

c - keder edge type 1

a

b

01

03

05

04 06

02

01 decumano - 3D model

02 typical corner detail - plan view

03 membrane - bottom view

04 corner detail - contruction

05 membrane - view

06 membrane - bottom view

07 typical clamping detail - section

PAGINA 4DETTAGLI RIVESTIMENTOdisegni, viste 3d, immagini dettalgi se realizzati, dettagli, ecc

CFD - analysis

Computational Fluid Dynamics is the bran-ch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows. CFD allows the building of computational models which simulate real-world physical properties and output the prediction of fluid dynamics and related physical phenomena.

ground analysis

01 area - picture

02 terrain topography modelling

03 wind velocity profile

static wind action alasys

04 building - isometric view

05 wind velocity stream line

06 model computational mesh

07 wind pressure distribution

dynamic wind action analysis

08 building - isometric view

09 wind velocity stream surface

10 wind velocity profile

05

01 02 03

04

06

07 10

08

09


01 natural ventilation inside a building

02 effect of distance between isolated houses

03 natural ventilation in a double skin facade

04 natural heating analysis

05 study of natural heating use in architecture - isometric view

06 study of natural heating use in architecture - typical section

07 double skin facade - typical detail

08 simulation of the heating transmittance in to the building

09 analysis of the heating transmittance in to the building

10 natural ventilation inside a building - isometric view

05 07

06 08

01

02

03 04

09 10

01 study of pollutants propagation

02 study of pollutants propagation

03 cfd explosion simulation

04 analysis of fire, heat and smoke propagation inside an

underground car park

05 determination of the optimal number of openings for

incoming air and jet fans to avoid recirculation regions and

increase smoke extraction rate

06 simulation of wind velocity stream line on a wind power

plant

07 topographic analysis for installation of a wind turbine

08 wind velocity stream line of a turbine analysis

07

06

02

01

03

04 05

08

mechanical

01

04

02

05

03

STRUCTURAL VERIFICATION

OF A TURNING PLATFORM

(MILLENNIUM TOWER NIGERIA)

01 platform structure with

primary structure

02 structure

03 deformation, distributed load

04 platform structure with

wood system

05 Von Mises solicitation


Technical dataMaterialHeightSurfaceInnerOuter

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

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01

02

03 04

01 retractable roof - detail

02 retractable roof - engine detail

03 engine - isometric views

04 engine - assembly


Project sample - Doha International stadium Quisque rutrum. Aenean imperdiet. Etiam ultricies nisi vel augue. Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero, sit amet adipiscing sem neque sed ipsum. Nam quam nunc, blandit vel, luctus pulvinar, hendrerit id, lorem. Maecenas nec odio et ante tincidunt tempus. Donec vitae sapien ut libero venena-tis faucibus. Nullam quis ante. Etiam sit amet orci eget eros faucibus tincidunt. Duis leo. Sed fringilla mauris sit amet nibh.

Maffeis Works

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