超长连体结构地震行波效应影响研究  

Study on the influence of traveling wave effect for ultra-long connected structure

作　　者：杨律磊 孙意斌 龚敏锋 杨栋 YANG Lülei;SUN Yibin;GONG Minfeng;YANG Dong(ARTS Group Co.,Ltd.,Suzhou 215123,China)

机构地区：[1]中衡设计集团股份有限公司,苏州215123

出　　处：《建筑结构》2022年第20期22-28,共7页Building Structure

基　　金：中衡设计集团科研项目(2020-S1):建筑结构抗震性能化设计技术研究与应用。

摘　　要：对于空间跨度较大的结构,行波效应对其地震响应的影响不可忽略,但目前对于超长连体结构的行波效应研究较少。苏州国际会议酒店为结构总长度333m的超长连体结构,连廊与塔楼之间采用铅芯橡胶支座与黏滞阻尼器实现柔性连接。以该项目为背景,研究行波效应对该类结构地震响应的影响。首先应用了行波效应视波速的简化计算方法,给出了国内场地视波速的参考取值范围。考虑不同视波速对苏州国际会议酒店进行多点激励地震弹塑性时程分析,重点研究一致激励与多点激励下的地震剪力、位移、加速度与支座性能差异性。结果表明:多点激励下结构楼层剪力小于一致激励,其差距随视波速的降低而增大,多点激励下基底剪力最大减小15%;结构层间位移角可满足规范要求,底部楼层多点激励层间位移角大于一致激励,其差异随视波速的降低而增大;考虑行波效应时连廊扭转效应显著提高,而连廊加速度有所降低;铅芯橡胶支座侧向位移可满足设计变形需求,其在多点激励下的侧向位移大于一致激励;行波效应亦对黏滞阻尼器附加给结构的阻尼比有一定影响。For structures with large spatial span,the influence of traveling wave effect on its seismic response cannot be ignored,but there are few studies on traveling wave effect of ultra-long connected structures at present.Suzhou International Conference Hotel is an ultra-long connected structure with a total length of 333 m,where lead rubber bearings and viscous dampers are used for flexible connection between the corridor and towers.Taking this project as the background,the influence of traveling wave effect on the seismic response of such structures were studied.Firstly,a simplified calculation method for apparent wave velocity of traveling wave effect was applied,and a reference range of apparent wave velocity for domestic sites was provided.Then elastoplastic seismic time history analysis of Suzhou International Conference Hotel under multi-point excitation with different apparent wave velocities was carried out,which focuses on the difference of seismic shear force,displacement,acceleration and performance of the bearing supports under uniform excitation and multi-point excitation.The results show that the storey shear force under multi-point excitation is less than that under uniform excitation,and the difference increases with the decrease of apparent wave velocity.The maximum reduction of base shear is 15%.The interlayer displacement angles can meet the specification requirements.The interlayer displacement angles of the bottom floors under uniform excitation are greater than those under multi-point excitation,and the differences increase with the decrease of apparent wave velocity.The torsional effect of corridor increases remarkably when considering traveling wave effect,while the acceleration of corridor decreases.The lateral displacements of lead rubber bearings can meet the requirements of design deformations,and the lateral displacements under multi-point excitation are greater than those under uniform excitation.As well,the damping ratio that viscous dampers append to the structure is influenced by trav

关 键 词：超长连体结构 行波效应 视波速 多点激励 铅芯橡胶支座 地震响应 

分 类 号：TU318.1[建筑科学—结构工程]