上海软土场地地铁车站结构的横向地震响应分析
袁勇1,2王祺1
Transverse Seismic Response Analysis of Shanghai Soft Soil Site Metro Station Structure
YUAN YongWANG Qi
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作者信息:1.1.同济大学地下建筑与工程系， 200092， 上海；
2.2.同济大学土木工程防灾国家重点实验室， 200092， 上海
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Affiliation:Department of Geotechnical Engineering, Tongji University, 200092, 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.2022.08.043
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中图分类号/CLCN:TU435∶U231.4
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栏目/Col:其他
摘要:
以上海软土场地地铁车站结构为分析对象，通过二层三跨和三层三跨两种典型车站，与场地深度和底部边界类型组合成8组场地车站结构分析模型，研究车站结构地震响应分析的差异，探讨地铁车站结构横向地震响应分析模型选择边界范围和类型的合理方式。结果表明：当采用底部边界黏弹性透射边界时，不同深度模型响应基本一致；采用底部固定边界模拟刚性基岩时，基岩深度70 m的规范推荐模型计算结果较为保守，结构的地震响应会放大约55%。
Abstracts:
Taking Shanghai soft soil site metro station structure as analysis object, through two typical stations of two-storey-three-span and three-storey-three-span, with site depth and bottom boundary type, 8 groups of site-station structure analysis model are composed. The station structure seismic response analysis difference is investigated. Reasonable method of choosing boundary range and type for metro station structure transverse seismic response analysis model is discussed. Results show that when viscoelastic bottom boundary is adopted, the responses of different depth models are basically the same. When fixed bottom boundary is used to simulate the rigid bedrock, the calculation results of the 70 m depth model are conservative, and the seismic response of the structure will be amplified by about 55%.
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