Implementation of advanced analysis method for steel-framed structures under fire conditions

作     者：Landesmann, A Batista, EDM Alves, JLD 

作者机构：Univ Fed Rio de Janeiro Architecture & Urbanism Fac Dept Struct Rio De Janeiro Brazil Univ Fed Rio de Janeiro COPPE Civil Engn Program BR-21945 Rio De Janeiro Brazil 

出 版 物：《FIRE SAFETY JOURNAL》 (消防安全杂志)

年 卷 期：2005年第40卷第4期

页      面：339-366页

核心收录：

学科分类：08[工学] 083305[工学-城乡生态环境与基础设施规划] 081403[工学-市政工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0814[工学-土木工程] 0833[工学-城乡规划学] 

基　　金：Brazilian Nuclear Regulatory Commission University of Sheffield Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES Comissão Nacional de Energia Nuclear, CNEN 

主　　题：fire-resistance design advanced analysis non-linear steel analysis limit-states design 

摘      要：This paper is concerned with the development of an advanced analysis numerical tool capable of estimating the inelastic large-displacement behaviour of plane steel-framed structures under fire conditions. A non-linear transient heat transfer analysis is performed on the basis of the finite element method (FEM), following the main guidelines proposed by the European Code for steel structures under fire conditions. The computational analysis program is used to assess the structural load-bearing functions and to estimate the structural behaviour and the corresponding time-resistance period. The original refined plastic hinge method is extended for fire design analysis considering both tangent modulus model and inelastic stiffness degradation concepts in the developed computational program. A tangent modulus model is developed for the European column buckling-curve for fire condition. A gradual inelastic surface is proposed as a function of the temperature and the loading combination. The results obtained are compared with those from an FEM computational program and those from the Eurocode simplified design recommendations. The benefits of using steel ductility in the current design of fire-unprotected structures are outlined. (c) 2005 Elsevier Ltd. All rights reserved.