地铁上盖超高层结构竖向振动台模型试验——不同振动控制方案影响研究  

Study on vertical shaking table model test of super high-rise structure over subway: the influence of different vibration control schemes

作　　者：柯小波 汪大洋[1] 周云[1] 梁秋河 李钧睿 凌海媚 丁超 KE Xiaobo;WANG Dayang;ZHOU Yun;LIANG Qiuhe;LI Junrui;LING Haimei;DING Chao(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《建筑结构》2022年第5期9-14,35,共7页Building Structure

基　　金：广州市科技计划项目(202032866、202102010459);广东省科技创新战略专项资金(pdjh2020a0452)。

摘　　要：通过对十种不同振动控制方案的1∶30缩尺比振动台试验模型进行竖向白噪声扫频,根据动力特性分析确定叠层橡胶支座合理的布置位置,并对具有合理的叠层橡胶支座布置位置的四支座模型和六支座模型以及传统结构设计模型共进行了84组工况的竖向地铁激励振动台试验,研究振动控制层竖向刚度对上部结构的竖向加速度响应和竖向振动控制效果的影响。结果表明:不同叠层橡胶支座布置位置对振动台模型竖向动力特性具有显著的影响,应根据其与原型结构动力特性的吻合度优化调整振动台模型支座布置方案;在满足竖向承载力的前提下,适当减小振动控制层竖向刚度,可降低竖向自振频率,使其进一步远离地铁场地波的卓越频带,竖向峰值加速度和竖向均方根加速度均有显著减小,竖向振动控制效果趋优。Through the vertical white noise frequency sweeping of the shaking table test models with 1∶30 scale ratio of ten different vibration control schemes, the reasonable placements of the laminated rubber bearings were determined according to the analysis of the dynamic characteristics. A total of 84 groups of vertical metro excitation shaking table tests were carried out on the four bearing model and six bearing model with reasonable laminated rubber bearing placement and traditional structural design model, the effect of vertical acceleration response and vertical vibration control effect of the upper structure caused by the vertical stiffness of the vibration control layer were studied. The results show that the different placement schemes of laminated rubber bearings have significant impacts on the vertical dynamic characteristics of the shaking table model, and the placement schemes of shaking table model bearings should be optimized according to its consistency with the dynamic characteristics of the prototype structure. Under the premise of satisfying the vertical capacity, appropriately reducing the vertical stiffness of the vibration control layer can reduce the vertical natural vibration frequency and make it further away from the excellent frequency band of the subway site wave. The vertical peak acceleration and the vertical root mean square(RMS) acceleration are significantly reduced, and the vertical vibration control effect is better.

关 键 词：地铁上盖结构 超高层结构 振动控制方案 叠层橡胶支座 竖向刚度 竖向振动控制效果 

分 类 号：TU352.1[建筑科学—结构工程] TU317.1