考虑温度影响的空间钢结构应力及变形变化规律  

Stress and deformation monitoring for steel space structure considering temperature influence

作　　者：游颖[1] 张泽涛 王君[1] 游宇峰 周敏峰 YOU Ying;ZHANG Ze-tao;WANG Jun;YOU Yu-feng;ZHOU Min-feng(School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China;Wuhan Zhongke Kechuang Engineering Testing Co.,LTD,Wuhan 430077,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068 [2]武汉中科科创工程检测有限公司,湖北武汉430077

出　　处：《空间结构》2020年第4期58-63,共6页Spatial Structures

基　　金：湖北省自然科学基金项目(2013CFB025);湖北省建设科技研究项目(鄂建文[2014]54号-50)。

摘　　要：空间钢结构成型后,温度是影响结构应力及变形的主要因素之一.以国家网络安全人才与创新基地展示中心的空间曲面钢结构为实例,布置结构应力及应变的主要监测点,持续监测结构成型后不同温度条件下钢结构应力及变形的实测值;同时,利用SAP2000软件建立有限元模型,对关键构件在温度应力作用下结构应力及变形进行模拟分析,得出温度变化对应力及变形的变化规律;最后,将实测应力值和变形值与有限元计算结果进行对比.结果表明,有限元计算结果和实测结果基本吻合,验证了结构施工的可行性,为工程的安全性提供了技术保障.After the steel space structure is formed, temperature is one of the main factors affecting structural stress and deformation. In this paper, taking the space curved steel structure of the National Network Security Talents and Innovation Base Exhibition Center as an example, the main monitoring points of the structural stress and strain are designed, and the measured values of the stress and deformation of the steel structure under different temperature conditions after the forming of the structure are continuously monitored. Simultaneously, the finite element model is constructed, and the stress and deformation of key nodes under the action of temperature are simulated and analyzed by SAP2000. Then the variation rule of temperature change on stress and deformation is obtained. Finally, the measured stress and deformation values are compared with the results calculated by finite element method. The results show that the finite element results are in good agreement with the measured results, which verify the feasibility of the structure construction and provide the technical guarantee for the safety of the project.

关 键 词：空间钢结构 温度变化 应力 变形 有限元分析 

分 类 号：TU393.3[建筑科学—结构工程]