摘要
为了解有柱与无柱地铁地下车站结构地震响应特性的异同,采用ABAQUS软件对2种地铁车站结构进行了水平向的非线性地震响应数值模拟,对比分析了在3种地震波不同峰值加速度作用下2种结构的响应特性。结果表明:1)2种车站结构的地震响应规律基本相似,在强震作用下均会受到严重的损伤,除侧墙与顶底板的连接处外,有柱车站的中柱与无柱车站的底板均为抗震的薄弱点,应注重加强其抗震性能;2)顶底板间最大的相对水平位移与输入波峰值加速度近似呈线性增大关系,且与波的频谱特性密切相关;3)在地震作用过程中产生的单向累积残余变形沿侧墙高度的变化曲线呈波浪状,最终摆向与最大摆幅的摆向一致;4)2种车站结构的加速度时程曲线形状相似,且相对基岩输入波有明显的放大。
In order to evaluate the similarities and differences of seismic response characteristics between conventional and column-free Metro station structures,finite element software ABAQUS is applied to simulate the horizontal nonlinear seismic responses of these two types of structures; and then the response characteristics of these two types of structures under three seismic waves with diverse peak ground acceleration（ PGAs） are compared and analyzed. The results indicate that： 1） These two types of station structures have similar seismic response patterns and both will be severely damaged under strong earthquake. Besides the connections between lateral wall and top/base plate,the central column of conventional station and the base slab of column-free station are the weak areas during vibration as well; and the aseismic performance of these components should be improved. 2） The maximum relative horizontal displacement between roof and base slab has a linear increasing relationship with PGA of input seismic wave,and closely depends on its spectrum characteristics. 3） In the process of ground motion,unidirectional residual deformation is accumulated. The deformation along the height of lateral wall after earthquake is wavelike and its ultimate swing direction is consistent with that of the maximum amplitude. 4） The acceleration time-histories of these two types of structures have analogous forms and show amplification effect significantly to input seismic waves of bedrock.
作者
刘庭金
郑月昱
林伟波
唐欣薇
LIU Tingjin ZHENG Yueyu LIN Weibo TANG Xinwei(School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong , China)
出处
《隧道建设》
北大核心
2017年第4期421-427,共7页
Tunnel Construction
基金
华南理工大学亚热带建筑科学国家重点实验室自主研究课题(2016KB16
2017KB15)
国家自然科学基金项目(51678248)
关键词
地铁车站
地震响应
无柱
残余变形
Metro station
seismic response
column-free
residual deformation
