摘要
为研究屋盖开孔对大跨结构风效应的影响,在边界层风洞中开展了大跨开合屋盖刚性模型风洞测压试验,分析了结构表面风荷载分布特征,基于时域分析法研究了屋盖开合对风致响应的影响。结果表明:大跨结构模态密集,第一阶模态能量最大,高阶成分的贡献不容忽视;屋盖开洞能有效的减小屋面风荷载,降低位移响应与加速度响应,减小风振系数。研究结果可为大跨开合屋盖风荷载设计提供参考。
To study the effect of roof opening on wind effect of large-span roof structure,wind tunnel tests on a large-span retractable roof were carried out in a boundary layer wind tunnel,then the characteristics of wind loads on the roof were studied,and the wind-induced responses influenced by the opening were investigated in time domain.The results induct that the models for the large-span structure are concentrated,the largest modal energy occurred in first model,and the contributions from higher order are not ignored.The wind loads reduced when the roof with opening,the same tendency was found for wind induced displacement response and acceleration response.The output will be a reference for wind load design of large-span retractable roof.
作者
陈伏彬
蔡虬瑞
翁兰溪
周晋芳
李秋胜
CHEN Fubin;CAI Qiurui;WENG Lanxi;ZHOU Jinfang;LI Qiusheng(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;Power China Fujian Electric Power Survey&Design Institute Co.,LTD.Fuzhou 35000,China;Department of Architecture and Civil Engineering,City University of Hong Kong, Hong Kong 999077,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2019年第1期88-95,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51778072
51408062)
长沙理工大学土木工程湖南省优势特色重点学科创新性项目
湖南省研究生科研创新项目(CX2016B397)~~
关键词
大跨开合屋盖
风荷载
风致响应
风振系数
风洞试验
large-span retractable roof
wind load
wind-induced response
wind vibration coefficient
wind tunnel test