摘要
在利用时域分析法研究索桁式玻璃幕墙在脉动风荷载作用下的响应情况时,需要得到其表面脉动风压时程数据.以随高度变化的风速谱(Sim iu谱)为基础,通过自回归线性滤波法,模拟出空间多结点相关脉动风压时程随机序列;由模拟结果计算出的功率谱与目标功率谱吻合良好.将所得时程数据加载在索桁式玻璃幕墙的有限元模型上进行瞬态计算,对位移结果做统计分析,获得适用于结构设计使用的风振系数.
The data of surface fluctuating wind pressure time interval is necessary in researching cable truss supporting glass curtain wall＇s response to fluctuating wind load.Based on wind velocity spectrum（the Simiu spectrum） changed with height,the random sequence of relevant spatial multi-nodes＇ fluctuating wind pressure time interval is simulated by Autoregression method of linear filtering.The calculated power spectrum according to simulation tallies fit well with the target one.Through adding the calculated data of time interval to the finite element model of the cable truss supporting glass curtain wall to compute the transient state,and analyzing the displacement result,the wind vibration coefficient is finally obtained.
出处
《昆明理工大学学报（自然科学版）》
CAS
北大核心
2011年第2期26-31,37,共7页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金(50978094)
"十一.五"国家科技支撑计划项目(2006BAJ06B05-5)
梅州市自然科学基金项目(2009KJ24)
关键词
索桁式玻璃幕墙
风压时程序列
自回归法
风压功率谱
风振系数
cable truss supporting glass curtain
wind pressure time series
Autoregression method
wind pressure power spectrum
wind vibration coefficient
