考虑风脉动特性的隔震结构抗震抗风性能分析  

Seismic and Dynamic Wind Performance Analysis of Base-isolated Building

作　　者：贾立哲[1] 段忠东[2] 

机构地区：[1]哈尔滨工业大学(威海)土木工程系,山东威海264209 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《工程抗震与加固改造》2012年第1期53-57,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：973计划项目子课题(2007CB714205);国家自然科学基金青年基金项目(51008100);中国博士后科学基金(201000471039);哈尔滨工业大学(威海)科学研究基金(IMJQ10090012)

摘　　要：采用隔震技术的结构虽可以减少结构在地震作用下的响应,但却使其进入了风荷载敏感区。在强气流作用下,隔震层的位移和结构加速度可能会远远超过其限值。本文以我国荷载规范所选用的Davenport谱为目标,运用基于三角级数的谐波叠加法模拟脉动风速时程,针对我国东南沿海某市一幢5层钢筋混凝土框架住宅,对其在强风荷载和8度地震作用下的性能进行了对比分析。结果表明,8度常遇地震作用下隔震层的位移与50m/s风速作用下的位移相当,而8度罕遇地震作用下隔震层的位移则略大于风速70m/s时的位移。地震作用下结构顶层的加速度远大于风荷载作用下的加速度,但当风速达到30m/s时,其加速度就已超过我国荷载规范所规定的人体舒适度限值。The seismic response of base-isolated buildings is effectively reduced,but the buildings are entered the sensitive area of wind load.The displacement of base isolators and the acceleration can reach the limits with the strong wind.In this study,the dynamic wind load is simulated with spectral presentation,and the seismic and wind performance of a five storey RC frame in China coastal city is analyzed.The results show that the displacement of base isolators of 8 degree design earthquake is comparative with 50m/s wind velocity,and the displacement of 70m/s wind velocity is little than those of 8 degree rare earthquake.The acceleration of earthquake action is greater than that of dynamic wind load,and the acceleration exceeds the limits of load code when the wind velocity is 30m/s.

关 键 词：隔震结构 脉动风模拟 抗震性能 抗风性能 

分 类 号：TU352.1[建筑科学—结构工程]