既有上部结构向下增建地下结构抗震性能研究  

Seismic performance of existing superstructures downwardly adding underground structures

作　　者：邬泽 卢广 庄海洋[2,3] 唐柏赞 WU Ze;LU Guang;ZHUANG Haiyang;TANG Baizan(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China;Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 210009,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055 [2]南京工业大学岩土工程研究所,南京210009 [3]华东交通大学土木建筑学院,南昌330013

出　　处：《振动与冲击》2025年第2期245-253,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(52378397,52368072,52478518);江西省双千计划(JXSQ2023101017);江西省自然科学基金(20224BAB204073)。

摘　　要：基于深圳北站广场向下增建城际铁路地下车站结构的实际工程背景,场地土中地下车站附带上部已建结构的地震反应特征、相互作用机理及其破坏机制成为结构抗震性能评价的关键问题。鉴于此,采用整体动力时程分析方法建立了土-地下结构-上部结构静、动力耦合非线性动力相互作用的三维精细化数值模型,系统地研究了地下车站附带上部结构、单建地下车站结构、单建地上结构的地震响应规律及其损伤演变过程。结果表明:相比单建地下车站结构,由于受上部结构影响,增建地下车站结构的水平侧向力及其层间位移角均显著增大,且顶、底板地震损伤面积及程度明显加剧;相比单建地上结构,由于受地下车站结构影响,增建地下车站结构的上部结构的变形协调性显著降低,其地震损伤较单建地上结构严重,尤其在中柱与二层楼板连接处。研究成果可为既有上部结构向下增层拓建的科学设计、防震减灾提供支撑和借鉴。Based on the practical engineering background of the construction of the subway underground station structure under the Shenzhen North Station Square,the seismic response,dynamic interaction and failure mechanism of the underground station with the existing superstructure in the site soil have become the key issues in the seismic performance evaluation of the structure.In view of this,a 3D refined numerical model was established for studying the static and dynamic coupling nonlinear dynamic interaction of soil-underground structure-superstructure by the method of global dynamic time history analysis.The seismic response and damage evolution process of the underground station added with the superstructure,single underground station structure and single superstructure are systematically investigated respectively.The results show that compared with the single underground station structure,the horizontal lateral force and the inter-story displacement angle of the additional underground station structure are significantly increased due to the influence of the superstructure,and the seismic damage area and the damage degree of the roof and floor are obviously aggravated.Compared with the single superstructure,due to the influence of the underground station structure,the deformation coordination of the superstructure of the additional underground station structure is significantly reduced,and the seismic damage is more serious than that of the single superstructure,especially at the connection between the column and the second slab.The research results provide a support and reference for the scientific design,earthquake prevention and disaster reduction of the existing superstructure downwardly adding underground structures.

关 键 词：土-地下结构-上部结构动力相互作用 增建地下结构 抗震性能 地震损伤 时程分析法 

分 类 号：TU354[建筑科学—结构工程] TU375