球面网壳结构风振响应时程分析  

Time-History Analyses of Wind Vibration Response of Spherical Latticed Shell Structures

作　　者：魏德敏[1] 边建烽 

机构地区：[1]华南理工大学建筑学院,广东广州510640 [2]广州珠江外资建筑设计院,广东广州510060

出　　处：《华南理工大学学报（自然科学版）》2007年第11期1-7,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(020940)

摘　　要：利用线性自回归滤波器法(AR法),编制了大跨空间结构的风速时程模拟程序,通过算例验证了该方法对大跨空间结构具有的良好适用性.将模拟出的风荷载作用于单层球面网壳,用有限元程序ANSYS进行了网壳结构的风振响应时程分析.通过时程分析结果与频域法的相应计算结果的对比,发现时程分析法与频域法的计算结果基本吻合,时程响应的峰值远大于静风响应,频域法的风振系数略大于时程法的结果.In this paper, according to the principle of linear auto-regressive model （AR Model）, a time-history simulation program of wind velocity is proposed for large-span spatial structures, and the feasibility of the proposed program is verified by a practical example. The simulated wind vibration loads are then applied to the time-history analysis of wind vibration response of single-layer spherical latticed shells by the finite-element program ANSYS. Through comparing the results obtained by the time-history analysis with the computational ones obtained by the frequency-domain method, it is found that the results of the time-history analysis are agreement with ones of the frequency-domain analysis on the whole. But the peak values of the time-history response are far exceed those of the static-wind response, and the wind-vibration coefficient of the frequency-domain method is bigger slightly that of the time-domain method.

关 键 词：球面网壳 风振响应 时程分析 频域法 

分 类 号：TU352.2[建筑科学—结构工程]