COLD-FORMED STRUCTURESCzech Technical University in Prague

2E12 Design of steel structures for renewable energy systems 1

21/11/2010

Contents

21/11/20102E12 Design of steel structures for renewable energy systems

2

Advantages, disadvantages Production Effect of cold working on strength Case studies Structural details

Advantages/disadvantages

21/11/2010

3

C9 Design of steel structures for renewable energy systems

Advantages / disadvantages

21/11/20102E12 Design of steel structures for renewable energy systems

4

Advantages: low weight shape variability surface protection

Disadvantages unit price difficult connecting low fire resistance more careful treatment is required (assembly)

shap

e va

riabi

lity

(Tre

bilc

ock)

Typical cross-sections

21/11/2010

5

C9 Design of steel structures for renewable energy systems

Profiles - bars

Open sections Closed sections

21/11/2010

6

C9 Design of steel structures for renewable energy systems

Profiles – bars - build-up sections

21/11/2010C9 Design of steel structures for renewable energy systems

7

Open build-up sections

Closed build-up sections

Profiled sheeting

21/11/2010C9 Design of steel structures for renewable energy systems

8

Profiled (trapezoidal) sheeting

21/11/2010C9 Design of steel structures for renewable energy systems

9

Without stiffeners

With longitudinal stiffeners

With transverse and longitudinal stiffeners

Production of sections

21/11/2010

10

C9 Design of steel structures for renewable energy systems

Cold rolled coated sheet steel coil (Dubina)

Production from cold-formed sheet

21/11/2010

11

C9 Design of steel structures for renewable energy systems

Production

21/11/2010C9 Design of steel structures for renewable energy systems

12

From thin-walled sheet by bending by pressing by rolling

Final surface protection in roll

Roll-forming process (Rhodes)

Rolling

21/11/2010

13

C9 Design of steel structures for renewable energy systems

(Dubina)

Roll-forming of lipped channel

21/11/2010

14

C9 Design of steel structures for renewable energy systems

(Dubina)

Roll-forming of profiled sheeting

21/11/2010

15

C9 Design of steel structures for renewable energy systems

(Vrany)

Roll-forming of profiled sheeting

21/11/2010

16

C9 Design of steel structures for renewable energy systems

(Vrany)

Roll-forming of profiled sheeting

21/11/2010

17

C9 Design of steel structures for renewable energy systems

(Vrany)

Roll-forming of profiled sheeting

21/11/2010

18

C9 Design of steel structures for renewable energy systems

Forming by folding

21/11/2010

19

C9 Design of steel structures for renewable energy systems

Press-braking

21/11/2010

20

C9 Design of steel structures for renewable energy systems

(Dubina)

Press-braking

21/11/2010

21

C9 Design of steel structures for renewable energy systems

Influence of production route

21/11/2010

22

C9 Design of steel structures for renewable energy systems

Strength increase due to cold working

21/11/2010C9 Design of steel structures for renewable energy systems

23

In Eurocode In tensional load cases fyb = fy < fya

Utilisation

21/11/2010

24

C9 Design of steel structures for renewable energy systems

Utilisation

21/11/2010C9 Design of steel structures for renewable energy systems

25

floors (support for concrete slabs / permanent shuttering)

cladding, roofing purlins, rails elements of light-weight structures

Utilisation

21/11/2010C9 Design of steel structures for renewable energy systems

26

columnliner tray

thermal insulation

thermal insulation strap

sheeting

Utilisation

21/11/2010C9 Design of steel structures for renewable energy systems

27

Cold-formed purlins and rails

21/11/2010C9 Design of steel structures for renewable energy systems

28

Profiles

Span – up to 10 m (12-15 m)

Cold-formed purlins and rails

21/11/2010

29

C9 Design of steel structures for renewable energy systems

21/11/2010

30

C9 Design of steel structures for renewable energy systems

Roofing

21/11/2010C9 Design of steel structures for renewable energy systems

31

Corrugated sheeting Sandwich panels Rigid in its plane

Support of purlin top flange

Uniaxial bending Lateral and rotational restraint

CDK

Continuous beams

21/11/2010C9 Design of steel structures for renewable energy systems

32

Overlap

Sleeve

Overlap – at support

21/11/2010C9 Design of steel structures for renewable energy systems

33

M

/2

supMsu

p

překrytí

Sleeve

21/11/2010C9 Design of steel structures for renewable energy systems

34

Sleeve – bigger sheet thickness

Structural details

21/11/2010

35

C9 Design of steel structures for renewable energy systems

Structural details

21/11/2010C9 Design of steel structures for renewable energy systems

36

Support on main frame

Structural details

21/11/20102E12 Design of steel structures for renewable energy systems

37

Roof apex connection