结构高位连桥支座位移分析及控制研究  

Displacement analysis and control study on support of high-rise structures connected with high corridor

作　　者：李永双[1] 肖从真[1] 金林飞[1] 张春俊[2] 

机构地区：[1]中国建筑科学研究院,北京100013 [2]中国中元国际工程公司,北京100089

出　　处：《土木工程学报》2013年第12期1-8,共8页China Civil Engineering Journal

基　　金："十二五"国家科技支撑计划课题(2012BAJ07B01)

摘　　要：阐述高位连体结构弱连接支座位移过大产生的原因及危害,提出支座位移设计及控制的理念与原则,给出布置阻尼器控制支座位移的方法。采用关节式圆盘形FPB隔震支座,布置黏滞阻尼器单元,通过非线性动力时程分析方法,对比分析控制措施前后的支座位移结果。对地震作用下高位连桥支座位移进行解析,明确了支座位移分量与主体结构间相对变形的内在联系,得到通过提高连桥与主体结构之间的协同变形能力,实现支座位移控制方法的理论依据。算例分析给出采用控制措施前后弱连接支座轨迹曲线、支座位移幅值时域对比曲线、阻尼器耗能滞回环曲线、结果表明合理布置阻尼器是控制支座位移的有效方法,可以降低峰值响应50%以上。The causes and detriments of excessive displacement for the support of weak-connected structures with high corridor were elaborated, the idea for displacement control and design of support was then proposed, and furthermore, the support displacement control method was given by installing damper between the main structures and corridor. By employing articulated disc FPB vibration-isolated support as well as viscous damper, a contrastive analysis on the support displacement results was conducted for the cases before and after taking control measures based on the nonlinear dynamic and time-history analyzing method. Through the analyses of support displacement under earthquake, the internal connection between support displacement and relative deformation of main structures as well as the coordinated deformation ability were achieved, so that the theoretical foundation of this method was established. Based on the support locus curve, the time-domain correlation curve of support displacement amplitude and the hysteretic loop curve of damper, it was found that the proposed method by appropriately installing damper is effective and sometimes the support displacement response may be reduced by more than 50%.

关 键 词：高层建筑 连体 弱连接支座 位移控制 

分 类 号：TU318.1[建筑科学—结构工程] TU973.31