基于反应位移法的分片预制装配式综合管廊抗震性能分析

Seismic Performance Analysis of Split-Prefabricated Utility Tunnel based on Response Displacement Method

为探讨分片预制装配式综合管廊的抗震性能,在总结国内外综合管廊抗震分析方法的基础上,以山东某实际工程背景,基于反应位移法采用有限元软件SAP2000建立相应的数值模型,对该综合管廊进行抗震设计分析与验算,并分析多种荷载组合工况对该结构内力大小及其分布的影响规律。结果表明:多种荷载工况条件下,最不利弯矩、剪力主要集中分布在侧墙与顶板之间位置;管廊通常可直接按照荷载标准组合进行抗震设计,但对于高烈度地区,地震作用组合可能起控制作用;分片预制装配式综合管廊在设计拼接截面处受力较小,有利于预应力筋的连接布置,而角部控制截面承载能力经验算亦满足设计要求。

In order to discuss the seismic performance of the split-prefabricated utility tunnel,the seismic analysis methods of the utility tunnel are firstly summarized.Then,based on the response displacement method,the numerical model is established by using the finite element software SAP2000,and the analysis of the seismic resistance design and recalculation of the utility tunnel are conducted.In addition,the effects of various load cases on the internal forces of the structure are analyzed.The results show that the maximum bending moment and shear force are mainly distributed between the side wall and the roof.Moreover,the seismic design of utility tunnel can be directly carried out according to the load standard combination,but for those areas with high-intensity earthquake design,the seismic resistance combination may play a key role.The split sections of the prefabricated utility tunnel show relatively small mechanical responses,which is beneficial to the connection approach of the pre-stressed bars,and also,the bearing capacity of the structure’s corner meets the design requirements after the corresponding re-calculation in accordance with codes.