装配式单舱地下管廊的地震响应有限元分析

Finite Element Analysis of Seismic Response of Prefabricated Single Compartment Underground Pipe Gallery

装配式单舱地下管廊具有良好的经济性和实用性,符合中小型城市特定管线的建设需求。地震是造成地下管廊破坏的主要因素,为探讨装配式单舱地下管廊的地震响应,基于有限元软件建立了管廊-土体的有限元模型,选取了三组不同峰值加速度的天然地震波输入,综合考虑材料的非线性以及结构和土体间的接触非线性因素,从界面位移、应力分布、材料损伤三个方面进行了模拟分析。结果表明,在横向方向,管廊整体并未发生扩展至整个截面的破坏,在纵向方向,管廊破坏并不连续,管廊侧壁与顶板交接处以及承插口位置是易受损部位,在抗震设计时应给予更多关注。

The prefabricated single compartment underground pipe gallery has good economy and practicality,which meets the construction needs of specific pipelines in small and medium-sized cities.Earthquake is the main factor causing damage to underground pipe galleries.In order to explore the seismic response of prefabricated single compartment underground pipe galleries,a finite element model of pipe gallery and soil was established based on finite element software.Three sets of natural seismic wave inputs with different peak accelerations were selected,and the nonlinear factors of materials and contact between structure and soil were comprehensively considered.Simulation analysis was conducted from three aspects:interface displacement,stress distribution,and material damage.The results indicate that in the horizontal direction,the overall damage of the pipe gallery did not extend to the entire section.In the vertical direction,the damage of the pipe gallery is not continuous.The junction between the side wall and the top plate of the pipe gallery,as well as the position of the socket and spigot,are vulnerable areas,and more attention should be paid in seismic design.