重庆大学学报2017，Vol.40Issue(11)：64-71,8.DOI:10.11835/j.issn.1000-582X.2017.11.008
考虑蠕变的约束钢梁抗火性能分析方法
Approach to analysis fire resistance of restrained steel beams after considering creep effect
摘要
Abstract
Significant creep deformation occurs on steel with the coaction of high temperature and loading,and the creep has a large effect on the deformation and load bearing capacity of steel beams in fire.In order to consider the effect of creep on the fire resistance performance of restrained steel beams,the high temperature creep model is employed to establish analysis theory on restrained steel beams by considering creep strain in the cross section of steel beam.And a computer program is performed by using MATLAB software.Restrained axial force and deflection of restrained beam under fire are analyzed by the computer program,and good agreement is found between calculation results and test data.The effect of creep on the fire resistance performance of simply supported beams and restrained steel beams is further investigated by employing the validated program.The results show that the proposed approach can accurately consider the effect of creep on the fire resistance performance of steel beams,and creep has a small effect on the fire resistant performance of simply supported beams,but has a large effect on that of restrained beams.关键词
蠕变/约束钢梁/抗火性能/分析方法Key words
creep/restrained steel beam/fire resistance/approach to analysis分类
建筑与水利引用本文复制引用
王卫永,何平召..考虑蠕变的约束钢梁抗火性能分析方法[J].重庆大学学报,2017,40(11):64-71,8.基金项目
中央高校基本科研业务费(CDJZR12200004) （CDJZR12200004）
重庆市自然科学基金资助项目(CSTC2013JCYJA30010).Supported by the Fundamental Research Funds for the Central Universities (CDJZR12200004),Chongqing Science and Technology Commission (CSTC2013JCYJA30010). （CSTC2013JCYJA30010）
