摘要
为进一步研究饱和砂土场地‑地铁车站结构体系地震动响应的参数敏感性问题,以某单层双跨地铁车站为研究对象,采用u-p格式饱和两相介质有效应力动力求解方法,建立了饱和砂土场地‑地铁车站结构体系耦合动力数值分析模型,选取土体剪切模量、渗透系数、内摩擦角和地震动强度作为敏感性影响参数,在基准值误差分析的基础上进一步开展灰色关联分析,得到了地震动响应影响因素的灰色关联度序列。计算分析结果表明:近场特征点动孔压比峰值对地震动强度和土体剪切模量的变化更为敏感,而加速度峰值对地震动强度和内摩擦角变化更为敏感,中柱上下端动剪力与动弯矩对内摩擦角和地震动强度的变化更为敏感。此参数敏感性分析流程方法,可为地铁车站抗震设计和减灾预测评估提供参考。
In order to analyze the parameter sensitivity for the seismic response of subway station structures embedded in saturated sand layers,a numerical model of a one-story subway station with double spans in saturated sand layers is established based on the u-p effective stress formulations of two-phase media.The shear modulus,permeability coefficient,internal friction angle,and ground motion intensity of surrounding soils are selected as sensitivity influential parameters.Moreover,combined with the fi‑ducial error analysis method,a grey correlation analysis is also carried out to obtain the grey correlation degree sequence of the corresponding seismic response.The computational results show that the peak excess pore pressure ratios at typical points of the near field are more sensitive to the ground motion intensity and the shear modulus of the surrounding soil,while the peak acceleration is more sensitive to the ground motion intensity and the internal friction angle of the surrounding soil.Besides,the dynamic bending moment and shear force of the middle pillar are more sensitive to the ground motion intensity and the internal friction angle of the surrounding soil.This presented procedure of the parameter sensitivity analysis for the seismic response of subway stations embedded in saturated sand layers can provide a reference for seismic design of subway station structure as well as a prediction for disaster prevention.
作者
许民泽
崔春义
王广兵
王启福
苏健
高凌霞
XU Minze;CUI Chunyi;WANG Guangbin;WANG Qifu;SU Jian;GAO Lingxia(Department of Civil Engineering,Dalian Maritime University,Dalian 116026,China;Department of Safety Engineering,Dalian Maritime University,Dalian 116026,China;Department of Ocean and Civil Engineering,Dalian Ocean University,Dalian 116023,China;School of Civil Engineering,Dalian Minzu University,Dalian 116600,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2022年第3期499-506,共8页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金面上项目(51578100,51722801)
中央高校基本科研业务费专项资金(3132019601)
近海与海岸工程国家重点实验室开放基金项目(LP1904)
“双一流”建设专项(CXXM2019BS008,SSCXXM017)资助。
关键词
饱和砂土
地铁车站结构
地震响应
灰色关联分析
saturated sand
subway station structure
seismic response
grey correlation analysis
