地铁车辆段上盖高层全框支剪力墙结构模拟地震振动台试验研究  

Study on shaking table test of complete frame-supported shear wall structure for high-rise building above the depot under simulated earthquakes

作　　者：欧阳蓉 余良刚 曹薇 陈洋洋[2] 徐希 OUYANG Rong;YU Lianggang;CAO Wei;CHEN Yangyang;XU Xi(Shenzhen Municipal Design and Research Institute Co.,Ltd.,Shenzhen 518029,China;Engineering Seismic Research Center of Guangzhou University,Guangzhou 510405,China)

机构地区：[1]深圳市市政设计研究院有限公司,深圳518029 [2]广州大学工程抗震研究中心,广州510405

出　　处：《建筑结构》2022年第1期70-77,共8页Building Structure

摘　　要：采用一栋122m高的深圳地铁常用高层住宅楼作为地铁车辆段上盖全框支剪力墙结构的试验模型,对其缩尺比例为1/20的结构模型进行模拟地震振动台试验。介绍了模型制作、相似关系的确定方法,测试了模型结构在小震、中震和大震作用下的加速度、位移和应变,并分析了试验现象和实测数据。结果表明:小震作用下结构自振频率仅下降3%左右,构件未出现裂缝,模型结构处于弹性阶段;中震作用下,模型无肉眼可见裂缝,结构自振频率下降11%左右,结构基本处于弹性阶段;大震作用下,结构自振频率下降48%~60%,模型结构在4层(转换层上第2层)剪力墙首先出现裂缝,继而其他构件出现裂缝,但模型未发生倒塌,进入了弹塑性阶段,模型结构在各地震水准作用下能够满足规范的抗震性能要求;地震波的频谱特性对大震下结构弹塑性层间位移角影响较大;全部加载完成后模型结构转换梁和底部框支柱完好,全框支层结构抗震性能较好。Take a 122 m-high residential building commonly used in Shenzhen metro as the test model of the complete frame-supported shear wall structure model above the depot, its structure model with a scale of 1/20 was subjected to a shaking table test under the simulated earthquakes. The model making and the method of determining the similarity relationship were introduced. The acceleration, displacement and strain of the model structure under the action of frequent, fortification and rare earthquakes were tested, and the experimental phenomena and measured data were analyzed. The results show that the natural frequency of the structure only drops by about 3% under the action of frequent earthquakes, and there are no cracks in the components, and the model structure is in the elastic stage;under the action of fortification earthquakes, the model has no visible cracks, and the natural frequency of the structure drops by about 11%, and the structure is basically in the elastic stage;under the action of a rare earthquake, the natural frequency of the structure drops by 48%~60%, and the model structure has cracks in the shear wall of the 4 th floor(the second layer on the transfer floor), and then the other components have cracks, but the model does not collapse and enters the elasto-plastic stage, and the model structure can meet the seismic performance requirements of the code under the action of various seismic levels;the spectral characteristics of the seismic wave have a greater influence on the elasto-plastic interlayer displacement angle of the structure under the rare earthquakes;the model structure transfer beam after all loading is completed and the bottom transfer columns are intact, and the full frame-support structure has good seismic performance.

关 键 词：全框支剪力墙结构 振动台试验 自振频率 抗震性能 转换梁 框支柱 

分 类 号：TU375[建筑科学—结构工程]