城市地下综合管廊节点地震响应的影响因素分析

Influencing factors analysis for node seismic response of underground utility tunnel in urban area

建立城市地下综合管廊典型节点二维有限元模型,分析在不同地震波不同峰值加速度、不同地震波相同峰值加速度,以及是否考虑土-结构接触面的接触作用下的地震响应。结果表明:①在不同地震波不同峰值加速度作用下,随地震波峰值的增大管廊节点的侧向位移、峰值加速度、峰值应力随之增大;②在不同地震波相同峰值加速度作用下,地震波的频谱特性对节点地震响应有显著影响;③是否考虑土-结构接触面的接触作用对管廊节点地震响应有较大影响。

A two-dimensional finite element model for typical nodes of a underground utility tunnel in the urban area was established,and seismic response analysis were carried out for different seismic waves with different peak accelerations,different seismic waves with the same peak acceleration,and with or without the consideration of contact effect between soil and structure,respectively.The results show that:(1)under the action of different seismic waves with different acceleration peak values,the lateral displacement,peak acceleration and peak stress of node increased with the increase of peak value in earthquake wave;(2)under the action of different seismic waves with the same acceleration peak value,the spectral characteristics of seismic waves influenced the seismic response of node significantly;and(3)contact effect between soil and structure influenced the seismic response of node significantly.