摘要
大跨度空间结构温度效应明显,对于地处干旱、大温差、太阳辐射强等西北特殊环境下的受力性能分析,需根据结构所处实际环境来确定温度作用的取值.以民勤文化体育中心为研究对象,首先确定结构的温度作用取值,其次采用MIDAS/Gen有限元软件对其钢结构屋盖进行温度作用分析,并将均匀温度作用与非均匀温度作用对结构的影响进行对比.结果表明:该地区修正后的基本最高温度为41℃,基本最低温度为-30℃;相较于升温作用,负温差对于空间结构的挠度控制产生不利影响;非均匀温度作用最大应力和变形超过了均匀温度作用,在结构设计及施工中,应予以考虑.本研究可为大跨度钢屋盖在特殊环境下的温度效应分析提供参考.
Long-span spatial structure has obvious temperature effect.For the mechanical performance analysis in northwestern China,due to drought,large temperature difference and strong solar radiation,the value of temperature effect should be determined according to the actual environment of the structure.This paper takes Minqin Culture and Sports Center as the research object.First,the temperature effect value of the structure is determined.Secondly,the MIDAS/Gen finite element software is used to analyze the temperature effect of the steel structure roof of this project.The effect of uniform an non-uniform temperature action on the structure is compared.Results show that the corrected basic maximum temperature in this area is 41℃,and the basic minimum temperature is-30℃.compared with the effect of temperature rise,the negative temperature difference has an unfavorable effect on the deflection control of the structure.The maximum stress and deformation of the non-uniform temperature effect exceed those of the uniform temperature effect.The non-uniform temperature effect should be considered in the structural design and construction.This study provides a reference for the temperature effects analysis of long-span steel roofs in special environments.
作者
王秀丽
罗晓舟
苟宝龙
WANG Xiu-li;LUO Xiao-zhou;GOU Bao-long(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Northwest Research Center of Disaster Prevention and Mitigation in Civil Engineering of the Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《空间结构》
CSCD
北大核心
2024年第2期53-60,共8页
Spatial Structures
基金
国家自然科学基金项目(51778273)
甘肃省住房与城乡建设厅建设科技项目(JK2020-26)。
关键词
大跨度钢屋盖
温度效应
非均匀温度作用
结构响应
long-span steel roof
temperature effect
non-uniform temperature effect
structural response
