变形缝对T型交叉管廊地震响应的影响  

Influence of deformation joints on seismic response of T-type utility tunnels

作　　者：王长祥 闫启超 梁建文[2] WANG Changxiang;YAN Qichao;LIANG Jianwen(North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300074,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074 [2]天津大学建筑工程学院,天津300350

出　　处：《世界地震工程》2022年第1期37-45,共9页World Earthquake Engineering

基　　金：国家重点研发项目(2017YFC0805000)。

摘　　要：整体现浇式地下综合管廊通常设置变形缝,以使管廊结构有效增强抵抗土体不均匀沉降的能力。本文以某拟建的整体现浇式T型交叉管廊为例,采用时程分析法计算了其在地震作用下的动力响应,研究了在地震作用下变形缝对管廊内力的影响,以及变形缝的相对变位。研究表明:在地震作用下,变形缝可以显著降低T型交叉管廊节点内力,但变形缝相对变位也会随之增大,最大张开量、压缩量和错位量分别可达5 mm、6 mm和3.2 mm。研究对整体现浇式T型交叉管廊的抗震设计具有一定的参考价值。The integral cast-in-place underground utility tunnels are usually equipped with deformation joints to enhance effectively their resistance to the uneven settlement of the soils.This paper made seismic analysis of T-type utility tunnels with deformation joints by the time-history analysis method,and studied the influence of the deformation joints on the seismic internal forces and the deformations at the deformation joints of the T-type utility tunnels.The results show that the deformation joints can effectively reduce the seismic internal forces at the junction sections of T-type utility tunnels,but the deformations at the deformation joints increase,and the maximum opening,compression and drift of the deformation joints may be up to 5 mm,6 mm and 3.2 mm,respectively.The results may be a reference for the design of the deformation joints of T-type utility tunnels.

关 键 词：T型交叉管廊 整体现浇式 变形缝 抗震分析 时程分析法 地震内力 

分 类 号：TU93[建筑科学—结构工程]