摘要
计算了北京奥林匹克公园网球中心赛场悬挑钢屋盖结构的风振响应。分析了网球中心赛场的振型响应能量,并选择了风振响应的主导振型。提出了振型背景位移响应与共振位移响应耦合系数的计算方法,对振型位移响应谱及位移方差的计算分析表明,网球中心赛场背景位移响应与共振位移响应之间的耦合效应对计算结果影响不大。研究了拟静力方法和CQC振型组合方法计算背景位移响应的差别,网球中心赛场的振型耦合效应对背景位移响应的影响明显,但根据主导振型计算得到的背景位移响应能够满足工程计算的精度要求。采用CQC和SRSS振型组合方法对共振位移响应的影响进行计算,结果表明振型耦合效应对共振位移响应的影响可忽略不计。在网球中心赛场的风振位移响应中,脉动位移响应的贡献大于平均风位移响应的贡献;在脉动位移响应中,背景位移响应占主要成分。
The wind-induced response of the cantilevered steel roof of the Olympic Park Tennis Center Stadium were investigated. The mode response energy was calculated and the dominant modes were identified. The coupling coefficient between background displacement response and resonant displacement response for a mode was presented in this paper. Based on analyzing modal displacement response spectrum and response variance for each dominant mode, it is found that the coupling effect between background response and resonant response is negligible. The influence of pseudo-static method and CQC procedures on background displacement response are studied and it is indicated that the mode-coupling effect of the background responses is strong while CQC procedure is recommended to calculate the background displacement response using the identified dominant modes. However the mode-coupling effect of the resonant responses is weak and SRSS procedure can satisfy the precision requirement. In the wind-induced displacement response, the fluctuating responses are larger than the mean responses and the background responses prevail over the resonant responses.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2009年第3期126-133,共8页
Journal of Building Structures
基金
国家自然科学基金重大研究计划重点支持项目(90815021)
