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Structural Engineering and Mechanics Volume 29, Number 1, May10 2008 , pages 37-53 DOI: https://doi.org/10.12989/sem.2008.29.1.037 |
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Simple nonlinear static analysis of steel portal frame with pitched roof exposed to fire |
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Panagis G. Papadopoulos, Anastassia K. Papadopoulou and Kyriakos K. Papaioannou
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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. | ||
| 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 | ||