基于SV波斜入射水平非一致场管廊动力响应研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (24) : 190-203.

论文

基于SV波斜入射水平非一致场管廊动力响应研究

黄德龙1，王惠跃1，岑航1，宗钟凌1，刘强2，汤爱平3，陶夏新3

作者信息 +

A study on dynamic response of a utility tunnel in horizontal non-homogeneous site based on SV wave oblique incidence

HUANG Delong1,WANG Huiyue1,CEN Hang1,ZONG Zhongling1,LIU Qiang2,TANG Aiping3,TAO Xiaxin3

Author information +

文章历史 +

摘要

水平非均匀场会对管廊抗震产生不利影响，并且斜入射地震波对地下结构的破坏更为严重。为了解决这些问题，本文基于粘弹性人工边界，推导并验证了水平非一致场等效结点公式。然后，建立管廊及周围土体三维有限元模型，获得了管廊在地震作用下的加速度、土压力增量、位移和应变响应。探究了水平非均匀场垂直剪切波（SV波）作用下不同入射角度对管廊响应的影响规律，包括加速度、土压力增量、管廊-土体相对滑移和管廊应变。研究发现PGA(peak ground acceleration)从0.1g到0.4g，相同入射角度下，PGA为0.1g与0.4g管廊峰值加速度响应差值接近50%，说明入射角度对较大PGA敏感；最大管廊-土体相对位移与入射角度的关系不受PGA的影响；粘土区相对位移与应变围合的面积更大，总体平均耗能比砂土区大63.2%。本文的研究结果可为水平非均匀场管廊抗震设计提供参考。

Abstract

Horizontal non-homogeneous site will adversely affect the seismic resistance of the utility tunnel, and the damage of obliquely incident seismic waves to the underground structure is more serious. In order to solve these problems, this paper derives and verifies the horizontal non-homogeneous site equivalent node formula based on the viscous-spring artificial boundary. Then, a three-dimensional finite element model of the utility tunnel and the surrounding soil body is established, and the acceleration, soil pressure increment, displacement and strain responses of the utility tunnel under seismic action are obtained. The influence laws of different incident angles on the response of the utility tunnel under the action of horizontal non-homogeneous site vertical shear wave (SV wave), including acceleration, soil pressure increment, relative slip of the utility tunnel-soil body, and strain of the utility tunnel, are investigated. It is found that the PGA ranges from 0.1g to 0.4g, and the difference between the maximum acceleration response of the utility tunnel with a PGA of 0.1g and 0.4g under the same incidence angle is close to 50%, which indicates that the incidence angle is sensitive to the larger PGA; the relationship between the maximum utility tunnel-soil relative displacement and the incidence angle is not affected by the PGA; the relative displacement and strain enclosing the clay zone is larger, and the overall average energy dissipation is larger than that of the sand zone by 63.2%. The results of this paper can provide a reference for the seismic design of horizontal non-homogeneous site utility tunnels.

导出引用

黄德龙1, 王惠跃1, 岑航1, 宗钟凌1, 刘强2, 汤爱平3, 陶夏新3. 基于SV波斜入射水平非一致场管廊动力响应研究[J]. 振动与冲击, 2024, 43(24): 190-203

HUANG Delong1, WANG Huiyue1, CEN Hang1, ZONG Zhongling1, LIU Qiang2, TANG Aiping3, TAO Xiaxin3. A study on dynamic response of a utility tunnel in horizontal non-homogeneous site based on SV wave oblique incidence[J]. Journal of Vibration and Shock, 2024, 43(24): 190-203

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