• ISSN 1673-5722
  • CN 11-5429/P

多地震动作用下地下结构Pushover分析法研究

蒋家卫 荀郑 赵凯 许紫刚

蒋家卫,荀郑,赵凯,许紫刚,2023. 多地震动作用下地下结构Pushover分析法研究. 震灾防御技术,18(1):20−26. doi:10.11899/zzfy20230103. doi: 10.11899/zzfy20230103
引用本文: 蒋家卫,荀郑,赵凯,许紫刚,2023. 多地震动作用下地下结构Pushover分析法研究. 震灾防御技术,18(1):20−26. doi:10.11899/zzfy20230103. doi: 10.11899/zzfy20230103
Jiang Jiawei, Xun Zheng, Zhao Kai, Xu Zigang. Pushover Analysis Method of Underground Structures Subjected to Multiple Earthquake Records[J]. Technology for Earthquake Disaster Prevention, 2023, 18(1): 20-26. doi: 10.11899/zzfy20230103
Citation: Jiang Jiawei, Xun Zheng, Zhao Kai, Xu Zigang. Pushover Analysis Method of Underground Structures Subjected to Multiple Earthquake Records[J]. Technology for Earthquake Disaster Prevention, 2023, 18(1): 20-26. doi: 10.11899/zzfy20230103

多地震动作用下地下结构Pushover分析法研究

doi: 10.11899/zzfy20230103
基金项目: 中国地震局工程力学研究所基本科研业务费专项(2019D05);中国博士后科学基金(2022M711606);国家自然科学基金面上项目(51978335)
详细信息
    作者简介:

    蒋家卫,男,生于1992年。博士后。主要从事地下结构抗震研究。E-mail:jjian224@njtech.edu.cn

    通讯作者:

    赵凯,男,生于1982年。教授,博士。主要从事土动力学与岩土地震工程方面的研究。E-mail:zhaokai@njtech.edu.cn

Pushover Analysis Method of Underground Structures Subjected to Multiple Earthquake Records

  • 摘要: 求解多地震动作用下结构响应均值与标准差是地震易损性分析的基础工作。在地下结构Pushover分析法的基础上,提出间接计算结构在多地震动作用下均值响应的求解方法,即间接求解法(Indirectly Solution Average,ISA )。该方法以多地震动作用下自由场响应均值为目标位移,采用倒三角荷载分布模式,经1次Pushover分析得到结构响应均值。采用ISA计算得到不同地震动强度(调幅12个强度等级)下地铁车站结构层间位移响应均值与标准差。将ISA计算结果与先进行地下结构Pushover分析,然后求取响应均值与标准差的直接求解法计算结果进行比较,可知2种方法得到的结构层间位移响应均值误差<2%,标准差误差基本<10%,验证了ISA计算精度,可为地下结构基于性能的抗震设计概率地震需求模型计算提供快速分析方法。
  • 图  1  地下结构Pushover力学模型

    Figure  1.  Pushover Mechanical Model of Underground Structure

    图  2  DSA与ISA计算多地震动作用下结构均值基本流程

    Figure  2.  The basic process of calculating the average value of structure subjected to multiple ground motions by DSA and ISA methods

    图  3  地铁车站断面尺寸(单位:米)

    Figure  3.  Subway station cross-section size(Unit:m)

    图  4  土-结构相互作用几何模型

    Figure  4.  Geometric model of soil-structure interaction

    图  5  自由场峰值地表位移

    Figure  5.  Peaks ground displacement of free field

    图  6  基于DSA计算的结构层间位移

    Figure  6.  Structural Inter-story displacement calculated by DSA method

    图  7  基于DSA得到的结构层间位移均值

    Figure  7.  The average inter-story displacement of the structure based on the DSA method

    图  8  基于DSA得到的层间位移标准差

    Figure  8.  The standard deviation of inter-story displacement of the structure based on the DSA method

    图  9  不同地震动强度下自由场反应均值

    Figure  9.  Average value of free field response subjected to different level ground motion intensity

    图  10  基于ISA得到的结构层间位移响应均值

    Figure  10.  The average inter-story displacement of the structure based on the ISA method

    图  11  基于ISA得到的结构层间位移标准差

    Figure  11.  The standard deviation of inter-story displacement of the structure based on the ISA method

    图  12  ISA计算误差

    Figure  12.  Calculation error of ISA method

    表  1  车站场地基本信息

    Table  1.   The basic site information of caofang subway station

    编号类型厚度/m密度/(kg·m−3剪切波速/(m·s−1泊松比
    1回填土21 7001470.35
    2粉土62 0201900.35
    3黏土72 0001930.36
    4砂土22 0502740.33
    5黏土102 0203000.36
    6砂土32 0503280.33
    7黏土21 9903310.36
    8砂土62 0503680.33
    9粉土72 0003820.35
    10基岩2 500
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出版历程
  • 收稿日期:  2022-10-15
  • 刊出日期:  2023-03-31

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