摘要
地下结构-土-地表结构相互作用(USSI)对周边场地及结构产生不可忽略的影响,为此,文章提出了一种考虑USSI的滑板隔震结构性能评估框架。该框架通过一系列振动台试验与数值模拟研究为目标隔震结构提供了性能评估参考模型数据库。以隔震结构参数设计与性能评估为目标,研究开展了地下结构-土-地表隔震结构动力相互作用系列振动台模型试验,基于试验结果建立了考虑USSI的隔震结构动力分析模型,对隔震结构在地震作用下的响应指标进行了分析与评估。研究表明:地下结构对地表及周边结构地震响应影响较大,其中以层间位移最为显著。本案例中的隔震结构不仅在控制加速度、层间位移以及层间剪力等方面效果显著,而且可有效削弱地铁车站对地表结构抗震安全的不利影响。所提性能评估框架可靠有效,可作为基准框架为此类重要隔震建筑进行评估与分析。
Underground structure-soil-aboveground structure interaction(USSI)plays a non-negligible impact on surrounding field and structures.Given that,a performance evaluation framework for isolated structures considering USSI is proposed to establish a reference database of the isolated structures by a series of shaking table tests and numerical simulation.For the purpose of parametric design and performance evaluation for isolated structure,a set of shaking table tests for subway station-soil-aboveground isolated structure interaction system were studied and performed.After that,the dynamic analysis model of isolated structure considering USSI was established based on the test results,and the seismic response indexes of target structure under seismic effect were analyzed and evaluated.The results show that the subway station has a strong influence on the seismic response of the surrounding structures with the inter-story displacement of the most significant.The isolated structure in this case not only significantly improves the multiple seismic responses in terms of acceleration,layer drift and shear force but also performs adequately in weakening the negative effect from the underground station.Finally,the proposed framework is reliable and effective,which can be used as benchmark model to perform evaluation and analysis for such important isolated structure.
作者
洪娜
陈清军
杜永峰
赵志鹏
Hong Na;Chen Qingjun;Du Yongfeng;Zhao Zhipeng(Tongji University,Shanghai 200092,China;Lanzhou University of Technology,Lanzhou 730050,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2022年第S01期160-167,共8页
China Civil Engineering Journal
基金
国家自然科学基金(51778489)
作者简介
洪娜(1988—),女,博士,讲师。主要从事结构-土-结构相互作用、结构减震控制方面的研究;通讯作者:陈清军(1963—),男,博士,教授。主要从事结构-土-结构相互作用、地面运动方面的研究;杜永峰(1962—),男,博士,教授。主要从事结构减震控制、装配式结构方面的研究;赵志鹏(1994—),男,博士。主要从事结构-土-结构相互作用、地面运动方面的研究。
