铁道标准设计2024，Vol.68Issue(7)：162-170,9.DOI:10.13238/j.issn.1004-2954.202211070003
高速列车振动荷载作用下桥隧交叠结构动力响应特性研究
Dynamic Response of Bridge-tunnel Structure Under Vibration Load of High-speed Train
摘要
Abstract
In order to study the dynamic response characteristics of bridge and tunnel overlapping structure under the vibration load of high-speed trains,the dynamic response law of bridge and tunnel structures under the vibration load of a single point is analyzed by using frequency response function and peak acceleration as the evaluation index through the combination of numerical simulation and model test.Based on the foundation project of Datong-Xi'an High-speed Railway Bridge on Xi'an Metro Line 14,a numerical model is established by using finite element software to study the dynamic response characteristics of the bridge and tunnel overlapping structure under the moving load of high-speed trains.The result of research shows that:Under the full frequency domain single point sweep vibration load,the dynamic response of bridge and tunnel overlaps increases with the increase of frequency,and the dynamic responses at different positions of the tunnel are significantly different.The dynamic response of the arch near the pile foundation is significantly greater than that of the arch and the arch bottom with an average difference of 2.48 dB and 4.15 dB,respectively.Considering that the moving effect of train vibration load will increase the dynamic response of bridge and tunnel overlapping structure,the peak accelerations at the arch,near the pile foundation side and away from the pile foundation side increases about 358%,280%,and 206% respectively under moving load.In addition,the study founds that the dynamic response of the tunnel structure starts to increase rapidly at about 10 m away from the bridge and tunnel overlapping structure,and the dynamic response changes tend to be stable within 10 m,so the monitoring and measurement within 10 m near the bridge and tunnel overlapping structure should be strengthened.关键词
高速列车/振动荷载/桥隧交叠结构/动力响应/模型试验/数值模拟Key words
high-speed train/vibration load/bridge and tunnel overlapping structure/dynamic response/model test/numerical simulation分类
交通工程引用本文复制引用
路啸,相旭,徐硕,徐强,陈嘉琦,赵明建,李勇..高速列车振动荷载作用下桥隧交叠结构动力响应特性研究[J].铁道标准设计,2024,68(7):162-170,9.基金项目
河北省重点研发计划项目(21375403D,20375410D) （21375403D,20375410D）
河北省自然科学基金面上项目(E2020210017) （E2020210017）
中铁第一勘察设计院集团有限公司科研项目(院科研19-55) （院科研19-55）
