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

Panagis G. Papadopoulos , Anastassia K. Papadopoulou , Kyriakos K. Papaioannou

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.

Key Words

steel portal frame; pitched roof; fire; snap-through; plastic hinges; truss model.

Address

Panagis G. Papadopoulos, Anastassia K. Papadopoulou and Kyriakos K. Papaioannou: Dept. of Civil Engineering, Aristotle University of Thessaloniki, 540 06 Thessaloniki, Greece

PDF Viewer

Preview is limited to the first 3 pages. Sign in to access the full PDF.

← Back to Volume 29, No. 1