地下十字交叉预制管廊的纵向抗震分析  

Longitudinal seismic analysis of underground cross precast utility tunnels

作　　者：梁建文[1] 周莹莹 李东桥 赵华 LIANG Jianwen;ZHOU Yingying;LI Dongqiao;ZHAO Hua(School of Civil Engineering,Tianjin University,Tianjin 300350,China;Tianjin Architecture Design Institute Co.,Ltd.,Tianjin 300074,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]天津市建筑设计研究院有限公司,天津300074

出　　处：《地震工程与工程振动》2023年第4期182-189,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51978462)。

摘　　要：提出了地下十字交叉管廊纵向抗震分析的一个反应位移法。采用周期性地层位移施加方式,研究十字交叉管廊的周期性地震响应,并确定了交叉节点处变形和内力峰值响应的最不利模式。以某地下十字交叉综合管廊为例,在ABAQUS有限元平台建立交叉管廊的壳-弹簧计算模型,采用壳单元模拟管廊结构,地基弹簧单元模拟土-结构相互作用,非线性弹簧单元模拟预制接头力学行为,研究了管廊交叉节点处最不利模式下的内力和变形。研究表明,方法适用于交叉型地下管廊的纵向抗震分析,相关建模及研究方法可为交叉型地下管廊抗震设计提供参考。A longitudinal response deformation method for longitudinal seismic analysis of cross precast utility tunnel was proposed in this paper.By applying periodic ground deformation,the periodic seismic response of the cross utility tunnel was calculated,to determine the most unfavorable modes of deformation and peak internal force response at the cross nodes.Taking a planned cross utility tunnels for example,the finite element model was established on ABAQUS finite element platform.Shell element was used to simulate the utility tunnel structure,while foundation spring element was used to simulate the soil-structure interaction.In addition,nonlinear spring element was used to simulate the mechanical behavior of precast joint.The internal force and deformation of the cross utility tunnels in the most unfavorable modes were studied.The results show that the proposed method is suitable for longitudinal seismic analysis of cross underground utility tunnel,and the modeling and calculating method may be a crucial for seismic design of cross underground structure.

关 键 词：十字交叉管廊 预制管廊 纵向抗震分析 最不利模式 反应位移法 

分 类 号：TU452[建筑科学—岩土工程]