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ON ASPECTS OF TENSILE STRUCTURES ANALYSIS Andrzej Ambroziak M.Sc. Paweł Kłosowski D.Sc., Assoc. Prof. LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL.

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Presentation on theme: "ON ASPECTS OF TENSILE STRUCTURES ANALYSIS Andrzej Ambroziak M.Sc. Paweł Kłosowski D.Sc., Assoc. Prof. LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL."— Presentation transcript:

1 ON ASPECTS OF TENSILE STRUCTURES ANALYSIS Andrzej Ambroziak M.Sc. Paweł Kłosowski D.Sc., Assoc. Prof. LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

2 LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 Typical tension roof shapes Examples of tension roofs Choice of materials technical fabrics Choice of materials - technical fabrics Material models of technical fabrics Example of numerical calculation Introduction – parts of presentation

3 LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 crescent hyper ridgle and valley saddle Typical tension roof shapes

4 Ashford shopping centre Millennium Dome Seville station LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 Examples of tension roofs

5 Forest Opera Sopot Połczyn-Zdrój open-air theatre LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

6 LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 threads net + coating What is the technical fabrics ? Choice of materials technical fabrics Choice of materials - technical fabrics

7 Material models of technical fabrics Dense net model [Branicki & Kłosowski] 4 LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 Micro-mechanical model [Nayfeh and Kress ] 1 Pseudo-continuum model [Kuwazuru] 2 1 Nayfeh A.H., Kress G.R.: Non-linear constitutive model for plain-weave composites. Elsevier, Composities Part B, Vol. 28 (1997), pp. 627– Kuwazuru O., Yoshikawa N.: Pseudo-continuum Model for Structural Analysis of Plain-Weave membranes. International Conference on Textile Composites and Inflatable Structures, Barcelona – Spain, 2003, pp. 335– Xue P., Peng X., Cao J.: A non-orthogonal constitutive model for characterizing woven composites. Elsevier, Composities Part A, Vol. 34 (2003), pp. 183– Branicki Cz., Kłosowski P.: Statical analysis of hanging textile membranes in nonlinear approach [in Polish], Archives of Civil Engineering, Vol. 29 (1983), pp. 189–220. Non-orthogonal model [Xue, Peng, Cao] 3

8 LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 Example of numerical calculation roof surface equation

9 Restaurant at the Great Canyon (USA) edge LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

10 static loading dead-weight loading initial pre-tensions operational configuration initial configuration dynamic loading wind loading LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

11 Pre-tension forces in initial configuration LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

12 Assumptions: wind X - along X axis wind Y - along Y axis Dynamic loading – wind loading LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

13 - nodal force - reduction coefficient dependent on element normal vector slope - actual elament area - pressure value - number of nodes Wind loading – nodal force LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

14 Wind loading functions: A) reduction coefficient B) pressure value LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

15 introducing into the MSC.Marc system dense net model >>> HOOKLW * wind loading >>> FORCEM * four-node isoparametric membrane element LARGE DISP parameter + small strain * Users handbook: MSC.MARC Volume D: User Subroutines and Special Routines, Version MSC.Software Corporation Description of applied program - MSC.Marc LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

16 Dynamic calculation – assumptions integration time step implicit nonlinear integration Newmark algorithm implicit nonlinear integration Newmark algorithm free vibrations free vibrations LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

17 Selection of integration time step LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

18 Middle point deflections under wind lading LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

19 Horizontal displacement under wind loading LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

20 Warp and weft forces LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

21 Conclusion In spite of significant vertical displacements, during wind blast, the change of values of the threads forces is relatively small. To predict real structure behaviour it is still necessary to include damping effects in the calculations. It is connected with the tunnel tests. LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004

22 THE END Thank you for your attention ! LIGHTWEIGHT STRUCTURES in CIVIL ENGINEERING INTERNATIONAL SEMINAR of IASS POLISH CHAPTER Częstochowa, 3 December, 2004 Andrzej Ambroziak M.Sc. Paweł Kłosowski D.Sc., Assoc. Prof.


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