Structural Engineering and Mechanics

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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)
  • Received : 2006.08.22
  • Accepted : 2008.02.26
  • Published : 2008.05.10
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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

References

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