荆亚涛, 吴波. Deformations of RC Frames Subjected to Different Fire Exposure Cases[J]. 2009, 29(4): 392-398.DOI:
Deformations of RC Frames Subjected to Different Fire Exposure Cases
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。
Abstract
Deformations of single-story and three-story RC frames subjected to different fire exposure casesare extensively investigated. Simulation results show that: (a)fire-spread has great impact on structuraldeformations at high temperature
and in general the lateral displacements of beam-column joints of framesunder fire-spread condition are less than those of frames in total fire;(b)the influences of firc intervals onadjacent and non-adjacent intervals are
respectively
great and negligible;and(c)the horizontal displace-ment of side beam-column joint of single-story frame subjected to asymmetric fire may be larger than thatof frame in total fire.