复杂地层中地铁交叠车站列车荷载作用下结构动力响应特性
陈志宁1赵红光1李逸涛2,3胡博韬2时乃琛2
Structural Dynamics Response Characteristics of Metro Overlapping Stations under Train Loads in Complex Strata
CHEN Zhining1ZHAO Hongguang1LI Yitao2,3HU Botao2SHI Naichen2
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作者信息:1.南京地铁建设有限责任公司， 210008， 南京
2.同济大学交通学院， 201804， 上海
3.中铁上海设计院集团有限公司， 200070， 上海
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Affiliation:1.Nanjing Metro Construction Co., Ltd., 210008, Nanjing, China
2.College of Transportation, Tongji University, 201804, Shanghai, China
3.China Railway Shanghai Design Institute Group Co., Ltd., 200070, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20253094
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中图分类号/CLCN:U231.4;TU311.3;TU93
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栏目/Col:土建工程
摘要:
［目的］交叠车站在列车荷载作用下的结构动力响应复杂，会导致局部的动力响应放大，以及结构不同位置处动力响应差异性较大的问题，应探究列车荷载作用下交叠车站结构的动力响应规律。［方法］以南京地铁7号线和10号线十字交叠换乘车站中胜站为研究对象，建立了复杂地层条件中的三维精细化有限元模型，并考虑列车进出站时的加减速作用，以及交叠车站列车不同进出站顺序。探究了列车荷载作用下交叠车站结构的动力响应规律，对车站结构变形、结构竖向动应力、既有车站竖向振动加速度进行了分析。选取了不同车站断面布置若干测点，通过实测数据对不同工况、不同运营时段下各测点的振动加速度进行比较。［结果及结论］无论是动位移、动加速度还是动应力，交叠段的动力响应均大于非交叠段。与非交叠段相比，交叠段中各测点的动位移放大系数最大值为4.57，动应力峰值增大了2.94倍，加速度放大系数最大值为4.00。
Abstracts:
［Objective］ The structural dynamics response of overlapping metro station under train loads is complex, often resulting in localized amplification of dynamics response and significant difference in dynamics behaviors across various structural locations. Therefore, it is essential to investigate the dynamics response law of overlapping station structures under train loading. ［Method］ Taking Zhongsheng Station, the cross-shaped intersect-overlapping interchange station on Nanjing Metro Line 7 and Line 10 as the research subject, a three-dimensional refined finite element model under complex stratum conditions is established. Considering the acceleration and deceleration effects of train entering/leaving station, as well as various sequences of train arrival/departure in the overlapping station，the dynamics response law of overlapping station structures under train loading are explored, the station structural deformation, vertical dynamic stress, and acceleration of existing station vertical vibration are analyzed. Multiple measuring points on different station cross-sections are selected, and vibration acceleration data at each measuring point under different working conditions and operating periods are compared through field measurements. ［Result & Conclusion］ Whether in terms of dynamics displacement and acceleration, or dynamics stress, the dynamics responses in overlapping sections are greater than those in non-overlapping sections. Compared to non-overlapping segments, the maximum dynamics displacement amplification factor at overlapping section measuring points is 4.57, the peak dynamics stress increases by a factor of 2.94, and the maximum amplification factor of vibration acceleration reaches 4.00.
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