考虑施工影响的大跨度钢结构温度效应及敏感性研究  

TEMPERATURE EFFECT AND SENSITIVITY ANALYSIS OF LONG-SPAN STEEL STRUCTURES CONSIDERING ERECTION PROCESS

作　　者：仝晓莉 陈志华[1,2] 赵中伟[1] 刘红波[1] TONG Xiaoli;CHEN Zhihua;ZHAO Zhongwei;LIU Hongbo(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure and Safety of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《工业建筑》2018年第8期141-146,共6页Industrial Construction

基　　金：国家自然科学基金项目(51208355)

摘　　要：大跨空间结构体型新颖,结构受力复杂,该类结构建造过程时间长,施工过程中的温度效应将会对使用阶段的力学响应产生较大影响。首先利用有限元软件得到了整体结构太阳辐射下的不均匀温度场;在此基础上研究了构件安装温度对节点位移及构件内力计算结果的影响规律;根据结构特征,将整体结构分为不同的区域,利用概率设计分析方法研究了整体结构最大应力对各部分温度变化的敏感性大小;最后,研究了施工过程对结构温度响应的影响,提出了在有限元软件中精确考虑构件安装温度的方法,得到了杆件内力随环境温度变化规律会受到施工过程影响的结论。The shape of long-span spatial structures is novel and complicated in structural stress. It needs a long time to complete the erection process and so the temperature effect during erection process may have a great influence on the mechanical response in service phase. In the paper,the influence of installation temperature on joint displacement and component internal force was derived based on the temperature field under solar radiation; the whole structure was divided into different subzones to investigate the sensitivity to temperature difference; in the last,the influence of erection process on mechanical behavior induced by temperature effect was studied, the method considering installation temperature during erection process simulation was put forward,it was concluded that changing rule of component internal force along with ambient temperature would be affected by erection process which was not similar to joint displacement.

关 键 词：贝壳形网壳 太阳辐射 施工模拟 单层网壳 敏感性分析 

分 类 号：TU393.3[建筑科学—结构工程]