采用分体柱的地铁地下车站地震反应仿真分析
毛念华
Seismic Response Simulation Analysis of Metro Station with Split Column Structure
MAO Nianhua
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作者信息:1.中铁第一勘察设计院集团有限公司，710043，西安;
2.陕西省铁道及地下交通工程重点实验室（中铁一院），710043，西安
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Affiliation:China Railway First Survey and Design Institute Group Co., Ltd., 710043, Xi′an, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.10.015
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中图分类号/CLCN:U231.4;TU311.3
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栏目/Col:研究报告
摘要:
以某地铁地下车站项目为工程背景，基于ABAQUS有限元软件，通过对模型建立中出现的数值积分方法、结构材料本构关系、边界条件的确定、地震波的选取与输入等关键问题的分析，建立合适的三维标准段地铁车站结构计算模型。对ABAQUS有限元软件进行动力时程分析中出现的地震波基线漂移现象，运用SeismoSignal软件对地震波进行基线校正。在理论分析的基础上，通过数值模拟，分别对采用框架柱和分体柱的地铁车站结构在双向耦合地震作用下进行动力时程分析。通过对采用框架柱和分体柱的地铁车站进行弹塑性时程分析发现，大震下分体柱的承载力比框架柱减小约16%，但是延性提高了约35%。分体柱可通过损失部分承载力，改变框架柱的受力特征，在很大程度上提高了柱子的延性。
Abstracts:
Taking an underground station project as the engineering background，ABAQUS finite element software is used to analyze the key issues in the modeling, such as the numerical integration method, the constitutive relation of structural materials, the determination of boundary conditions, the selection and input of seismic waves, finally an appropriate 3D standard metro station calculation model is established. According to the baseline drift of seismic waves occurred in dynamical time-history analysis of ABAQUS, SeismoSignal software is used to correct the baseline. Through theoretical analysis, the dynamical time-history analysis of metro station with split column and frame column structure under bidirectional coupling seismic action is conducted respectively. The results show that under strong earthquake, the load capacity of split column structure is 16% less than that of frame columns, but the ductility of the former increases about 35%. In other words, the split column structure can change the force characteristics of the frame columns by losing some bearing capacity, thus greatly improves the ductility of the column.
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