不同分块形式下拼装式综合管廊地震响应分析

Seismic Response Analysis of Assembled Utility Tunnel Under Different Block Forms

随着城市地下综合管廊高速发展,拼装式管廊因其独特优势被广泛应用。我国关于地下综合管廊地震响应文献较少,相关抗震设计规范也不够成熟,开展综合管廊地震动力响应研究十分必要。本文基于有限元理论和时程分析法,以北京某地下综合管廊为工程背景,结合实际地质资料,对8 m埋深下的预制拼装综合管廊在不同分块形式下地震响应进行研究;建立综合管廊三维模型,针对现浇管廊、预制管廊两种工况分别采用人工合成地震波和EL-centro波两种地震波作用下的动力响应规律进行探讨分析,旨在为工程设计施工提供参考依据。

With the rapid development of urban underground utility tunnel,assembled utility tunnel has been widely used due to its unique advantages.There are few seismic response documents on underground utility tunnel in China,and the relevant seismic design specifications are not mature enough,so it is necessary to carry out the seismic dynamic response research of utility tunnel.Based on finite element theory and time history analysis,taking an underground utility tunnel in Beijing as engineering background,combined with actual geological data,seismic response analysis was carried out for different block forms of prefabricated assembled utility tunnel at 8 m buried depth,and the 3 D model of assembled utility tunnel was established.The dynamic response law of cast-in-place pipe gallery and prefabricated pipe gallery under two conditions of artificial seismic wave and EL-centro wave was expounded,in order to provide reference for engineering design and construction.