基于不同抗震方法的砂土地区单舱管廊地震反应分析

Seismic response analysis of underground utility tunnel in sandy area using three methods

利用三种不同的抗震分析方法——反应加速度法、反应位移法、时程分析法,基于有限元计算方法对砂土地区单舱管廊结构进行横向地震作用计算,分析了在三种不同分析方法下单舱管廊的受力响应特征,比较了三种方法在同种工况下的响应规律。分析结果表明,在单舱管廊结构抗震分析中三种方法具有相似又呈现不同特点的内力分布规律。同时可以得出,单舱管廊结构的受力敏感位置为结构侧墙与底板角点一定范围内,设计时应重点关注。

In this paper,three different seismic analysis methods-response acceleration method,response displacement method and time history analysis method,are used to calculate the lateral seismic resistance of the single-chamber tunnel in the sandy area based on finite element method.This paper analyzes the force response characteristics of the single-chamber tunnel under three different analysis methods,and compares the applicability of the three methods under the same working conditions.The analysis results show that the three methods have different calculation result in the seismic analysis of the single-chamber tunnel.At the same time,it can be concluded that the sensitive force position of the single-chamber tunnel is during the structural side wall and the bottom plate.