基于反应位移法地下综合管廊抗震性能分析

Analysis of Seismic Performance of Underground Comprehensive Pipe Gallery Based on Response Displacement Method

随着地下综合管廊建设的大力推广,地下综合管廊的抗震设计也越来越重视。本文对江苏徐州地区某地下综合管廊采用反应位移法进行地震反应分析。根据考虑地震作用和不考虑地震作用两种工况下的弯矩值及轴力值的变化得出,管廊侧壁底部及底板跨中部位在考虑地震作用时弯矩增大较明显,其余位置考虑地震作用时弯矩均减小。当覆盖层厚度一定时,基床系数在一定范围变化对管廊地震作用下的弯矩变化影响较小。

More and more attention has been paid to the seismic design of underground comprehensive pipe gallery with the popularization of the construction of underground comprehensive pipe gallery.Seismic response analysis has been carried out for an underground comprehensive pipe gallery in Xuzhou,Jiangsu Province by using the response displacement method.Based on the change in bending moment and axial force subject to seismic action or not,significant increase of bending moment can be found at the bottom of side wall and the mid-span of bottom slab of the pipe gallery by considering seismic action,however,decreased bending moment occurs at other locations under seismic action.The change in subgrade coefficient within a certain range has little effect on the change in bending moment of pipe gallery under seismic action subject to a constant thickness of overburden.