1

Current research of Division of Metal Structures

at Poznan University of Technology

Ph. D., Dr. Sc. Katarzyna RZESZUTInstitute of Structural Engineering

METNET KEMI 2017

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Institute of Structural Engineering

Division of Metal Structures

Research Team

Ph. D., Dr. Sc. Maciej SZUMIGAŁA - Professor

Ph. D., Dr. Sc. Katarzyna RZESZUT - Assistant Professor

Ph. D. Marcin CHYBIŃSKI - Assistant Professor

Ph. D. Robert STUDZIŃSKI - Assistant Professor

M. Sc. Katarzyna CIESIELCZYK - Assistant

M. Sc. Łukasz POLUS - Assistant

AIM

Understanding and describing the phenomenon of

mechanical, kinematical and stability response of steel

structural elements

REASERCH

Experimental tests:

material tests

full scale

Numerical simulations Abaqus/CEA

veryfication and validation

convergance analysis of the FE models

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Z-purlins:

FEM model Real structure with clearancesBuckling mode

Trapezoidal sheet

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

1

0 2,5 7,5 12,5 17,5 22,5

Displacement parameter

1l

1g

2l

2g

3l

3g

l/lcrDouble sigma Nonlinear FEM analysis

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0 0

0 0

0 0

 

0

 

n n n n

n n

n n n n

R u k u u

R u u

R u k u u

for

for

for

1 1 2 12 2 1  x yM M P u R u

1 1 2 2 3 3 223  x yM M M P Ru u

2 2 3 33 4 3  x yM M P u R u

Virtual work equations

Elastic support with clearances

Virtual deformations, variation of a) u1, b) of u2

Model structure

Numerical example

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Failure mapsshear

wrinkling

Pareto optimization of:

- support model

- geometric and material

parameters

FEA and laboratory tests

88

Experimental tests:

• material tests

• full scale (Fig. 1)

• double lap shear test

Numerical simulations (Fig. 2)

• Abaqus/CEA

• veryfication and validation

• convergance analysis of the FE

models

AIM

Understanding and describing the phenomenon of global and local loss of stability

of thin-walled beams interacting with sandwich panels

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Experimental tests:

• material tests

• four point bending test

(Fig. 1)

Numerical simulations (Fig. 2)

• Abaqus/CEA

• veryfication and validation

• convergance analysis of the FE

models

AIM

Understanding and describing the mechanical and kinematical response of the

sandwich panels with hybrid cores

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11

stiffe

ningribs

sx

44Asy

44At 44A

t 44B

sx

44Bsy

44B

sx

43Asy

43At 43A

t 43B

sx

43Bsy

43B

sy

43Asy

43B

sy

44B

sy

44A

sx

43B

sx

43Asx

44B

sx

44A

t 44B

t 43B

t 43At 44A

Side ”B”Side ”A”

Stress in web

FEA and laboratory full scale tests

{

AIM

An analysis of load bearing capacity and stiffness

A prototype of the

connector

Test of the composite

beams

Test of the shear

connectors

FEA and laboratory full scale tests

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Fire Dynamics Symulator FEM and EC 3 1-2 Analysis

Fire in the shopping arcade

Bus fire

Yeld stresses

Critical

temperature:

450 ◦C

Research objectives

AIM

Formulation of interdisciplinary problem regarding

analysis of state and response of structures in fire

Modelling and numerical analysis of fire course

with respect to dynamics of fire actions and

mechanical response of structure locally affected

by high temperature

Mechanical analyses of the real buildings subjected

to localized fire

CFD

Firemodelling

FEM

Structuralanalysis

Thermalboundaryconditions

Thermal exposure of elements in the vicinity of fire can be significant

Other parts of structure can be barely affected by temperature

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Experimental programe

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Validation of Heat Transfer Model

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Thank you for your attention

Ph. D., Dr. Sc. Katarzyna RZESZUTInstitute of Structural Engineering

METNET KEMI 2017

18

REFERENCES

1. Rzeszut K., A.Garstecki, Thin-walled structures with slotted connections in stability problems,. Thin-Walled Structures 49 (2011) 674–681 TWS 2010

2. Rzeszut K., Garstecki A., Stability of steel structures with clearances and imperfections. Proceedings of

the VII European Congress on Computational Methods in Applied Sciences and Engineering Held in

Crete, Greece 5-10 June 2016, ISBN: 978-618-82844-0-1 s. 4770-4779

3. Garstecki A., Rzeszut K., Polus Ł., Klój M., Terech M., The impact of fire situation on the static and

stability response of the bearing steel structure, In: Kleiber M., Burczyński T., Wilde K., Górski J.,

Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues, Advances in

Mechanics: Theoretical, Computational and Interdisciplinary, s. 187-190, 2016.

4. Ciesielczyk K., Rzeszut K., Local and distortional buckling of axially loaded cold rolled sigma profiles,

Acta Mechanica et Automatica, volume 10, Issue 3, p. 218-222. DOI: 10.1515/ama-2016-0033

5. Studziński R., Pozorski Z., Experimental and numerical analysis of sandwich panels with hybrid

core, Journal of Sandwich Structures and Materials, 2016

6. Studziński R., Experimental analysis of sandwich panels with hybrid core made of aerogel and

polyurethane foam, Modern Building Materials, Structures and Techniques, MBMST 2016

7. Ciesielczyk K., Studziński R., Experimental and numerical investigation of stabilization of thin-

walled Z-beams by sandwich panels, Journal of Constructional Steel Research, 133, pp. 77-83, 2017

8. Studziński R., Ciesielczyk K., Experimental investigation of the stabilization of the C-section purlins

by sandwich panels, Recent Progress in Steel and Composite Structures: Proceedings of the XIII

International Conference on Metal Structures, pp. 101-106, CRC Press, 2016