预制地下综合管廊地震响应有限元分析

为揭示预制综合管廊在地震荷载工况下的薄弱部位及其受力、变形情况，以自卡式全预制地下连续墙综合管廊为研究对象，进行了地震响应三维有限元分析。结果表明：地震作用下，结构位移主要受土体影响，结构边角点动力响应强烈，顶板、底板动力响应强于侧墙；结构位移从下往上呈递增趋势，应力集中于边角、接头，凸墙纵筋受力明显，两侧墙纵筋轴力呈反对称趋势；加速度传播受介质影响，结构中加速度放大系数低于土体。

Finite Element Analysis of Seismic Response of Prefabricated Underground Utility Tunnel

In order to reveal the weak parts, stress and deformation of prefabricated utility tunnel under seismic load, the seismic response of self-made underground continuous wall utility tunnel is studied in this paper. The results show that: under the earthquake action, the structural displacement is mainly affected by the soil, the dynamic response of the structural corner points is strong, the dynamic response of the roof and floor is stronger than that of the side wall; the structural displacement increases gradually from the bottom to the top, and the stress is concentrated in the corner and joint; the longitudinal reinforcement of the convex wall is stressed obviously, and the axial force of the longitudinal reinforcement of the two walls shows an antisymmetric trend; the acceleration propagation is affected by the medium, and the acceleration in the structure is amplified The coefficient is lower than that of soil.