摘要
随着沉管隧道修建越来越多及近年来全球地震活动频发,沉管隧道及其接头在地震作用下的抗震性能成为目前研究的一大热点。文章立足于广州洲头咀沉管隧道工程的实际背景,基于ABAQUS软件有限元-无限元相结合的方法建立了沉管隧道-接头-场地土的三维实体模型,并通过在模型基底输入El Centro地震动时程,研究了不同接头连接刚度条件下沉管隧道不同接头处的动力响应特性。计算结果表明:隧道反应基本上呈对称分布,接头连接刚度越大,接头的内力(轴力、弯矩)也越大。在进行沉管隧道设计时,可以通过采用适当的接头刚度来控制接头的内力。
With the construction of a growing number of immersed tunnels and the frequent occurrence of globalseismic activities, seismic performance of immersed tunnels and their joints has become a focus in the current re-search. Using the Zhoutouzui immersed tunnel in Guangzhou as an example, a 3 D numerical model of the immersedtunnel-joint-soil is established by ABAQUS software using finite element/infinite element method. The dynamic re-sponse characteristics of different joints are studied by inputting the time history of El Centro ground motion at themodel base. The calculation results show that the tunnel reaction is basically a symmetrical distribution, and thehigher the joint connection stiffness the higher the internal force of the joints（axial force and bending moment）.When an immersed tunnel is designed, the appropriate joint stiffness can be considered to control the internal forceof the joint.
作者
陈红娟
闫维明
陈适才
张学明
CHEN Hongjuan;YAN Weiming;CHEN Shicai;ZHANG Xueming(Institute of Geophysics, China Earthquake Administration, Beijing 100081;Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124)
出处
《现代隧道技术》
EI
CSCD
北大核心
2018年第3期106-111,共6页
Modern Tunnelling Technology
基金
国家自然科学基金项目(51708519)
北京市自然科学基金项目(8164067)
关键词
地震动
沉管隧道
接头
有限元
无限元
动力响应
Ground motion
Immersed tunnel
Joint
Finite element
Infinite element
Dynamic response
