既有上部结构向下增建地下结构抗震性能研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (2) : 245-253.

地震科学与结构抗震

既有上部结构向下增建地下结构抗震性能研究

邬泽1，卢广2，庄海洋*2,3，唐柏赞3

作者信息 +

Seismic performance of existing superstructures downwardly adding underground structures

WU Ze1, LU Guang2, ZHUANG Haiyang*2,3, TANG Baizan3

Author information +

文章历史 +

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，本文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，系统的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。

Abstract

Based on the practical engineering background of 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. Given this, this paper establishes a 3D refined numerical model of static and dynamic coupling nonlinear dynamic interaction of soil-underground structure-superstructure with the method of global dynamic time history analysis. The seismic response and damage evolution process of underground station with superstructure, single underground station structure and single superstructure are systematically investigated. 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 its 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 can provide support and reference for the scientific design, earthquake prevention and disaster reduction of the existing superstructure downwardly adding underground structures.

导出引用

邬泽1, 卢广2, 庄海洋2, 3, 唐柏赞3. 既有上部结构向下增建地下结构抗震性能研究[J]. 振动与冲击, 2025, 44(2): 245-253

WU Ze1, LU Guang2, ZHUANG Haiyang2, 3, TANG Baizan3. Seismic performance of existing superstructures downwardly adding underground structures[J]. Journal of Vibration and Shock, 2025, 44(2): 245-253

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