装配式地下综合管廊抗震性能影响因素分析

The Factors Affect Seismic Performance Analysis of Underground Integrated Pipe Gallery

地震作为影响城市地下构筑物安全的关键因素,研究地下综合管廊的抗震性能,提前采取抗震减灾措施,对提高当前地下综合管廊抵抗地震的性能具有重要的意义。通过采用线弹性单元简化管廊模型,对不同回填土体、管廊连接节点刚度及地震波方向等因素作用下管廊的地震响应进行研究。结果表明:(1)管廊周边回填土体对管廊的地震响应性能影响较大,且管廊两侧及顶部的土体基床系数对管廊地震响应不一致;(2)管廊节点刚度对结构地震响应影响较小,为确保节点处抗渗性能,建议采用柔性材料以承受管廊节点处位移。结合对不同因素对管廊地震响应的影响,提出了管廊结构的抗震减灾措施,为今后综合管廊抗震设计提供一定的参考。

Earthquake is a key factor affecting the safety of urban underground structures. It is of great significance to study the seismic performance of underground comprehensive pipe corridors and take seismic mitigation measures in advance to improve the seismic performance of current underground comprehensive pipe corridors. Pipe gallery simplified model by using linear elastic unit, for different backfill soil stiffness and seismic wave direction, utility tunnel connecting nodes under the influence of factors such as seismic response of the utility tunnel was studied, the results show these follows. The utility tunnel backfill soil surrounding the influence on the seismic response properties of the pipe rack, and the coefficient of soil pipe gallery on both sides and the top of the bed do not match the seismic responses of the pipe rack. The stiffness of pipe gallery joints has little influence on the seismic response of the structure. In order to ensure the impermeability of the joints, it is suggested to adopt flexible materials to withstand the displacement of pipe gallery joints. Combined with the influence of different factors on seismic response of pipe gallery, the seismic mitigation measures of pipe gallery structure are put forward, which can provide some reference for seismic design of comprehensive pipe gallery in the future.