竖向地震动对地铁车站共构结构体系地震响应的影响研究
马晓明1,2苗晗1,3,4蒋录珍1,3,4安军海1,3,4
Influence of Vertical Ground Motion on Seismic Response of Subway Station Co-structure System
MA Xiaoming1,2MIAO Han1,3,4JIANG Luzhen1,3,4AN Junhai1,3,4
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作者信息:1.河北科技大学建筑工程学院，050018，石家庄
2.华能国际工程技术有限公司，100010，北京
3.河北省岩土与结构体系防灾减灾技术创新中心(筹)，050018，石家庄
4.智能低碳装配式建筑技术研究中心，050018，石家庄
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Affiliation:1.School of Civil Engineering, Hebei University of Science and Technology, 050018, Shijiazhuang, China
2.Huaneng International Engineering Technology Co. ,Ltd., 100010, Beijing, China
3.Innovation Center of Disaster Prevention and Mitigation Technology for Geotechnical and Structural Systems of Hebei Province (Preparation), 050018, Shijiazhuang, China
4.Engineering Technology Research Center for Intelligent & Low-carbon Assembled Building, 050018, Shijiazhuang, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.09.025
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中图分类号/CLCN:U231.4; TU93
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栏目/Col:研究报告
摘要:
［目的］地铁车站共构结构体系(以下简称“共构结构体系”)通过厚板实现箱形结构与箱形框架结构的连接转换。因共构结构体系的结构形式独特，其地震响应规律目前尚不明确，需进一步研究其地震响应特征。［方法］以某综合管廊与地铁车站共构结构体系为例，建立了土-共构结构体系相互作用的有限元仿真模型。考虑单向地震波和双向地震波(含水平向、竖向)作为输入，选取了3种工况，分析了共构结构体系在地震作用下的加速度响应特征、位移响应特征、受压受拉损伤情况及演变过程，并以共构结构体系左侧柱端为例，讨论了部分结构部位的内力响应特征。［结果及结论］双向耦合地震动对共构结构体系竖向加速度的影响较大，在侧墙与负一层底板连接处加速度的最大增幅达158%(与竖向地震动作用相比)。竖向地震动会加大共构结构体系顶底板的相对水平位移和相对竖向位移，加大柱子的内力响应。柱端、侧墙下部、底板两端、构件连接处、腋角等位置为共构结构体系地震损伤薄弱部位，应对这些部位进行加强处理。
Abstracts:
［Objective］ The co-structure system of subway station (hereinafter referred to as 'co-structure system') realizes the connection and conversion between the box structure and the box frame structure through thick plates. Due to the unique structural form of the co-structural system, its seismic response law is currently unclear, further study on the characteristics of its seismic response is needed. ［Method］ Taking the co-structure system of a comprehensive utility tunnel and subway station as an example, the finite element simulation model of soil-co-structure system interaction is established. Considering one-way and two-way seismic waves (both horizontal and vertical) as inputs, three working conditions are selected. The acceleration response characteristics, displacement response characteristics, compressive and tensile damage situations, and the evolution process of the co-structure system under seismic action are analyzed. Taking the left column end of the co-structure system as an example, the internal force response characteristics of some structural parts are discussed. ［Result & Conclusion］ The vertical acceleration of the co-structure system is greatly affected by the bidirectional coupling ground motion. The maximum increase in acceleration at the joint between the side wall and the negative first floor slab reaches 158 % (compared with the vertical ground motion). Vertical ground motion may increase the relative horizontal and relative vertical displacements in the roof and floor of the co-structure system, and the internal force response of the column as well. Locations of the co-structure system such as the column ends, the lower part of the side wall, both ends of the bottom plate, the connection of the components, and the axillary angle are vulnerable to seismic damage, and should be strengthened accordingly.
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