典型单建式人防工程地震反应分析

Analysis on Seismic Response of Typical Single Building Type Civil Defense Engineering

以北京市某典型单建式人防工程为研究对象,利用MIDAS GTS NX有限元建模,开展土-结构相互作用三维非线性地震反应分析。结果表明:随着输入地震动幅值的增大,结构峰值加速度随墙高逐渐增大;结构的层间相对位移随地震动强度的增大而进一步增大,最大层间位移角在规范要求范围内;对于典型单建式人防工程结构而言,中柱的内力反应最大,是结构抗震的薄弱环节。分析内容揭示了单建式人防工程在地震作用下的反应规律,研究结果为工程的抗震性能评估和抗震设计提供参考。

Taking a typical single building type civil defense engineering in Beijing as the research object,we analyzed the three-dimensional nonlinear seismic response of soil-structure interaction by using MIDAS GTS NX finite element modeling.The results show that with the increase of the input earthquake ground motion amplitude,the peak acceleration of the structure increases gradually with the wall height.The relative displacement of the interlayer of the structure increased with the increase of earthquake ground motion,and the maximum interlayer displacement angle is within the range of specification requirements.For the typical single building type civil defense engineering structure,the center column is the weak link of structural seismic resistance since it has the biggest internal force response.The analysis results in this paper illustrates the response law of single building type civil defense engineering under earthquake,and the research results could provide reference for the seismic performance evaluation and seismic design of single building type civil defense engineering.