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http://dx.doi.org/10.12989/sem.2008.29.1.037

Simple nonlinear static analysis of steel portal frame with pitched roof exposed to fire  

Papadopoulos, Panagis G. (Department of Civil Engineering, Aristotle University of Thessaloniki)
Papadopoulou, Anastassia K. (Department of Civil Engineering, Aristotle University of Thessaloniki)
Papaioannou, Kyriakos K. (Department of Civil Engineering, Aristotle University of Thessaloniki)
Publication Information
Structural Engineering and Mechanics / v.29, no.1, 2008 , pp. 37-53 More about this Journal
Abstract
Plane steel portal frames, with pitched roof, exposed to fire, are examined. First, a determinate frame is analysed by hand. For flexible columns and shallow roof, snap-through occurs before plastic hinges mechanism is formed. An indeterminate frame with shorter columns and taller roof is also analysed by hand. Then, the same frame is simulated by a truss and a nonlinear static analysis is performed by use of a short computer program. The results of computer analysis by use of truss model are compared with those of analysis by hand and a satisfactory approximation between them is observed.
Keywords
steel portal frame; pitched roof; fire; snap-through; plastic hinges; truss model;
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  • Reference
1 Absi, E. (1978), Methodes des Calcul Numérique en Elasticite, Eyrolles, Paris
2 Schlaich, J. and Schäfer, K. (1991), "Designing and detailing structural concrete using strut-and-tie models", Struct. Eng., 69, 113-125
3 Scholz, H. (1991), "Stability control of pitched roof frames by allowable member depth", J. Constr. Steel Res., 18, 253-267   DOI   ScienceOn
4 Horne, M.R. (1985), Frame Instability and the Plastic Design of Rigid Frames, in Narayanan R., Editor. "Steel framed structures" Elsevier
5 Papadopoulos, P.G. and Mathiopoulou, A.K. (2005), "Analysis of portal steel frame exposed to fire by use of a truss model", Proc. of 8th Int. Conf. on Advanced Computational Methods in Heat Transfer, 495-505, Lisbon, 24-26 March
6 Papadopoulos, P.G. and Karayannis, C.G. (1988), "Seismic analysis of RC frames by network models", Comput. Struct., 28, 253-267
7 Eurocode 3 (1995), Design of Steel Structures. Part 1-2. Fire Resistance. ENV 1993-1-2
8 Argyris, J.H. Editor. F.E.No.Mech. (Finite Elements in Nonlinear Mechanics). International Conferences. Institute for Statics and Dynamics, University of Stuttgart, I. 1978, II. 1981, III. 1984
9 Bruneau, M., Uang, C.-M. and Whittaker, A. (1997), Ductile Design of Steel Structures. McGraw-Hill
10 Coda, H.B. and Greco, M.A. (2004), "A simple FEM formulation for large deflection 2D frame analysis, based on position description", Comput. Meth. Appl. Mech. Eng., 193, 3551-3557
11 Fraternali, F., Angelilo, M. and Fortunato, A. (2002), "A lumped stress method for planar elastic problems and their discrete-continuum approximation", Int. J. Solids Struct., 39, 6211-6240   DOI   ScienceOn
12 Papadopoulos, P.G. and Xenidis, H.C. (1999(II)), "A truss model with structural instability for the confinement of concrete columns", J. Euro. Earthq. Eng., 57-80
13 Scholz, H. (1988), "A new solution to the snap-through of pitched roof steel frames", J. Constr. Steel Res., 9, 265-285   DOI   ScienceOn
14 Wong, M.B. (2001), "Elastic and plastic methods for numerical modeling of steel structures subject to fire", J. Constr. Steel Res., 57, 1-14   DOI   ScienceOn