地震作用下盾构法隧道的弹塑性受力分析

Elasto plastic stress analysis of shield tunnels under earthquake actions

摘要: 分析了地震时盾构法隧道发生震害的主要原因，利用可考虑盾构法隧道衬砌接头协同受力的等效连续化计算模型，建立了在地震行波和地震引起不均匀沉降作用下隧道弹塑性受力分析的简化方法，并举例介绍在上述两种地震作用下隧道内力的分析结果。

Abstract: This paper presents a practical method to evaluate the longitudinal elasto plastic stiffness of shield tunnel,and proposes a calculation procedure to estimate the seismic stress caused by the seismic ground displacement and earthquake induced settlement.As an numerical example,the procedure is applied to analyze the seismic stress of the Shanghai Yanan East Road tunnels across the Huangpu River.