地下闭合框架结构地震反应影响因素分析

Analysis on Seismic Response Factors of the Underground Closed-Frame Structure

城市地下道路工程在近几年得到了快速发展。反应位移法是地下结构抗震中最常用的方法。本文依据《地下结构抗震设计标准》反应位移法I的计算方法,采用Midas-Gen有限元分析软件,对地下闭合框架结构进行了多种模型的抗震分析。通过研究地震动峰值加速度、覆土厚度、基床系数、设计基准面深度几个变量因素,得出闭合框架结构地震反应的趋势和规律,为设计人员对类似工程抗震设计提供了直观的认识和参考。

The urban underground road engineering has been developing rapidly in recent years. Seismic displacement method is the most commonly used method for seismic of underground structures. According to the seismic displacement method I in Standard for Seismic Design of Underground Structure, the seismic analysis of the underground closed frame structure is carried out with various models using Midas-Gen.Through the study of several variable factors, such as the peak ground acceleration, the thickness of cover soil, the coefficient of subgrade reaction and the depth of design datum, the tendency and law of seismic response of closed frame structure are obtained. It provides the designers with an intuitive understanding and reference for the seismic design of similar projects.