土木工程学报  2020, Vol. 53 Issue (3): 19-27    
  结构工程 本期目录 | 过刊浏览 | 高级检索 |
高层隔震结构提离摇摆耦合理论模型及振动台试验验证
何文福1 李雪1许浩1刘文光1 冯德民2
1. 上海大学,上海 200240;2. 藤田技术中心,日本厚木 234-0125
Theoretical model and verification of shaking table test for high-rise isolated#br#  structures coupling with uplifting and rocking
He Wenfu1 Li Xue1 Xu Hao1 Liu Wenguang1 Feng Demin2
1. Shanghai University,Shanghai 200240,China; 2. Fujita Corp,Atsugi 234-0125,Japan
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摘要 基于受力及变形方程的微分求解给出高层隔震结构考虑支座水平及竖向刚度衰减规律和结构摇摆效应的耦合动力理论模型,并给出摇摆角、压应力及剪应变对隔震层水平及竖向的力学性质影响规律。对高宽比为5及25的隔震结构进行振动台试验研究,试验结果表明大高宽比隔震结构动力特性出现明显振型二阶效应,地震动作用下大高宽比结构隔震层摇摆角响应比小高宽比结构大,在输入地震动峰值06g时两者差值达到5倍以上,且大高宽比结构出现明显的支座受拉现象。对隔震层水平、竖向及摇摆响应的理论计算值和试验实测值进行对比,结果表明理论和试验结果较为一致。进一步分析4种高宽比隔震结构的摇摆角响应,得到摇摆角随高宽比增加而增大的结果。大高宽比隔震结构更易产生摇摆响应,隔震层的摇摆角不可忽视,因此高层结构在隔震设计中应考虑隔震层的摇摆响应和支座受拉的情况。
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何文福 李雪 许浩 刘文光 冯德民
关键词 高层隔震结构提离摇摆耦合理论模型振动台试验摇摆效应高宽比    
Abstract: Based on differential solutions of force and deformation equations,a simplified dynamic model for the high-rise isolated structure considering the attenuation law of the horizontal and vertical stiffness of the bearing and the structural rocking effect is proposed. The mechanical effects of rocking angle,compressive stress and shear strain on the horizontal and vertical isolation layers are shown. The shaking table tests were conducted on two isolated structures with the aspect ratio of 5 and 2.5,respectively. The test results show that the second-mode of the high-aspect ratio isolated structure is obvious. In addition,the rocking angle of the high-aspect ratio isolation layer is larger than that of the small-aspect ratio structure under ground motion. When the input ground motion peak is 0.6 g,the difference in rocking angle for the two types of structures is more than 5 times,and the rubber bearing of high-aspect ratio isolated structure shows tension. By comparing the theoretical calculation values of the horizontal,vertical and rocking responses of the isolation layer with the experimental measured values,it can be seen that the theoretical and experimental results are consistent. The rocking angle responses of isolated structures with four kinds of aspect ratio are analyzed by the theoretical model. The theoretical analysis shows that the rocking angle increases with the the aspect ratio. The isolated structure with large aspect ratio is more prone to rock,and the rocking angle of the isolation layer cannot be ignored. Therefore,the rocking response of the isolation layer and the tension of the bearing should be considered in the isolation design of high-rise structure.
Key wordshigh-rise isolated structure    uplifting and rocking theoretical model    shaking table test    rocking effect    aspect ratio
    
引用本文:   
何文福 李雪 许浩 刘文光 冯德民. 高层隔震结构提离摇摆耦合理论模型及振动台试验验证[J]. 土木工程学报, 2020, 53(3): 19-27.
He Wenfu Li Xue Xu Hao Liu Wenguang Feng Demin. Theoretical model and verification of shaking table test for high-rise isolated#br#  structures coupling with uplifting and rocking. 土木工程学报, 2020, 53(3): 19-27.
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