不同受火方式下混凝土框架结构的变形研究  

Deformations of RC Frames Subjected to Different Fire Exposure Cases

作　　者：荆亚涛[1] 吴波[1] 

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广州510640

出　　处：《防灾减灾工程学报》2009年第4期392-398,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(50738005);国家科技部支撑计划子课题(2OO6BAJ03AO3-12)资助

摘　　要：针对单层框架和三层框架,通过高温数值分析,初步考察了不同受火方式下结构的变形特征。研究发现:①火灾蔓延对结构高温变形影响较大,此时节点的水平位移总体上小于结构全层/全部受火时的相应结果;②受火区间仅对相邻跨或相邻层有一定影响,而对隔跨或隔层影响相对较小;③非对称局部受火情况下,单层框架边节点的水平位移可能比全层受火时更大。Deformations of single-story and three-story RC frames subjected to different fire exposure cases are extensively investigated. Simulation results show that： （a） fire-spread has great impact on structural deformations at high temperature, and in general the lateral displacements of beam-column joints of frames under fire-spread condition are less than those of frames in total fire; （b） the influences of fire intervals on adjacent and non-adjacent intervals are, respectively, great and negligible; and （c） the horizontal displacement of side beam-column joint of single-story frame subjected to asymmetric fire may be larger than that of frame in total fire.

关 键 词：钢筋混凝土(RC) 框架结构 层间蔓延受火方式 

分 类 号：TU377.2[建筑科学—结构工程]