摘要
影响地铁车站动力响应的地震动强度参数有多种,研究地震动强度参数和结构地震响应指标的关联性对地下结构抗震设计具有重要的现实意义。为了研究近场地震动作用下适用于评价地铁地下车站的地震动强度参数,以大开地铁车站为原型,基于非线性时程分析结果,通过对22个地震动强度参数与结构地震响应指标进行双对数线性回归分析,从有效性、实用性和效益性对地震动强度参数与结构地震响应指标进行分析评价。研究结果表明:以地表峰值加速度PGA为代表的加速度型地震动参数以和加速度谱强度ASI为代表的谱相关型地震动参数更适合用于研究单层地铁车站结构,适合用于预测结构在地震作用下的动力响应;顶底板层间位移角、中柱底部剪力和中柱底部弯矩适合作为预测地铁地下结构的动力响应指标。
There are many kinds of ground motion intensity measures that affect the dynamic response of metro stations. It is of great practical significance to study the correlation between the ground motion intensity measures and the structural seismic response indexes for seismic design of underground structures. In order to study the ground motion intensity measures suitable for evaluating subway underground stations under the near-field ground motion, the Daikai metro station is taken as the prototype. Based on the results of nonlinear time-history analysis, through the bilinear logarithmic regression analysis of 22 seismic intensity measures and structural seismic response indexes, the ground motion intensity measures and structural seismic response indexes are analyzed and evaluated in terms of efficiency, practicality and proficiency. The results show that the acceleration ground motion intensity measure represented by PGA and the spectral correlation ground motion intensity measure represented by ASI are more suitable for studying one-story subway station structures, which are suitable for predicting the dynamic response of structures under ground motion. The drift ratio between the top slab and the bottom slab, the shear force at the bottom of the middle column and the bending moment at the bottom of the middle column are suitable as the dynamic response indexes for predicting the underground subway structures.
作者
钟紫蓝
申轶尧
甄立斌
张成明
赵密
杜修力
ZHONG Zi-lan;SHEN Yi-yao;ZHEN Li-bin;ZHANG Cheng-ming;ZHAO Mi;DU Xiu-li(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2020年第3期486-494,共9页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金面上项目(51978020)
国家自然科学基金联合基金项目(U1839201)
广东省地震工程与应用技术重点实验室开放基金项目(2017B030314068)。
关键词
地震动
强度参数
非线性动力分析
地震响应指标
有效性
ground motion
intensity measure
nonlinear dynamic analysis
seismic response index
efficiency