摘要
为探究箱型框架地铁车站结构的地震响应与破坏机制,利用单向振动台,在名山波、什邡波、凤翔波三种水平地震波作用下开展可液化地基中箱型框架地铁车站结构的地震响应实验,分析地基土水平位移、加速度及车站结构动土压力、应变的变化规律。结果表明,地基土位移峰值在左摆与右摆时呈现明显的不对称性,凤翔波作用下地基土反应更为强烈。小震时,地基土未发生液化;中震及大震时,地基土发生不同程度液化。液化后土体传播剪切波的能力减弱,加速度放大效应逐渐消失。车站侧墙动土压力随结构高度的增加而增大。大震时,车站侧墙与顶板的连接处,中柱与中板、顶板的连接处容易遭到破坏。该研究为箱型框架地铁车站抗震设计提供了理论依据。
This paper seeks an insight into the seismic response and destruction the box-frame subway station structures. The targeted research involves using a one-way shaking table to perform seismic response experiments on the box-frame subway station structure in the when subjected to the action of the three horizontal seismic waves, such and Fengxiang; and subsequent analysis of the horizontal displacement and acceleration of the soil foundation, the dynamic earth pressure of the side wall, and the strains of structure of demonstrate that an obvious displacement peak asymmetry occurs as a result of the soil foundation swinging left and right and this is particularly so in the case of Fengxiang wave which produces a more in tense reaction in foundation soils; a small earthquake does not induce a liquefaction of ground soils; a moderate or strong earthquake leaves ground soils subjected to different degrees of liquefaction, followed by a weakened ability of soil to propagate shear wave and a gradually disappearing acceleration effect,along with a consequent increase in the dynamic earth pressure of the side wall due to the increased structure height; and a strong earthquake comes with a destruction in the side wall and the roof,and between the middle column and the roof, and the middle plate. The study could provide a theoretical basis for the seismic design of box-frame subway stations.
作者
陶连金
王忠
安军海
王焕杰
Tao Lianjin;Wang Zhong;An Junhai;Wang Huanjie(Key Laboratory of Urban Security ＆ Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《黑龙江科技大学学报》
CAS
2018年第4期449-453,477,共6页
Journal of Heilongjiang University of Science And Technology
基金
国家重点研发计划项目(2017YFC0805403)
国家自然科学基金项目(41572276)
关键词
地铁车站
箱型框架
地震响应
可液化地基
振动台实验
subway station
box-frame type
seismic response
liquefiable ground
shaking table experiments
