[1]雷虎军,李书斌,黄炳坤.非一致地震激励下大跨铁路斜拉桥车桥耦合振动研究[J].地震工程与工程振动,2022,42(06):213-221.[doi:10.13197/j.eeed.2022.0623]
 LEI Hujun,LI Shubin,HUANG Bingkun.Train-bridge coupling vibration of long-span railway cable-stayed bridge under non-uniform seismic excitation[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2022,42(06):213-221.[doi:10.13197/j.eeed.2022.0623]
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非一致地震激励下大跨铁路斜拉桥车桥耦合振动研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
42
期数:
2022年06期
页码:
213-221
栏目:
研究论文
出版日期:
2022-12-31

文章信息/Info

Title:
Train-bridge coupling vibration of long-span railway cable-stayed bridge under non-uniform seismic excitation
作者:
雷虎军 李书斌 黄炳坤
福建工程学院 土木工程学院, 福建 福州 350118
Author(s):
LEI Hujun LI Shubin HUANG Bingkun
College of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China
关键词:
高速铁路斜拉桥行车安全性行波效应场地效应失相干效应
Keywords:
high-speed railway cable-stayed bridgerunning safetytraveling wave effectsite effectde-coherence effect
分类号:
U24TB123
DOI:
10.13197/j.eeed.2022.0623
摘要:
为研究地震空间变异性对大跨铁路斜拉桥车桥系统动力响应的影响,以某主跨432m的钢桁梁斜拉桥为工程背景,通过梁格法简化正交异性钢桥面板构建全桥梁格模型,并基于谱方法人工合成空间相关地震动输入自编程序进行仿真计算,系统研究了行波效应、场地效应、失相干效应对该桥车桥系统动力响应的影响。计算结果表明:地震动的3种空间变异性对该桥车桥系统动力响应的影响显著。其中,列车行车安全性指标随行波速度的增大而减小,其最不利行波速度为250m/s;车桥系统的动力响应均随桥塔场地类型的增加急剧增大;失相干效应会降低车桥系统的动力响应,且对车体质心加速度的影响最大;综合考虑3种空间变异性后,列车的脱轨系数、轮重减载率和轮轴横向力会分别增大13.4%、13.9%和8.3%。文中的研究成果可为大跨铁路钢桁梁斜拉桥的设计提供理论支持。
Abstract:
To study the influence of seismic spatial variability on the dynamic response of train-bridge system(TBS) of long-span railway cable-stayed bridge(LRCB), a LRCB with steel truss girder with a main span of 432 m was taking as the engineering background. The full bridge lattice model was constructed by simplifying orthotropic steel bridge deck by grillage method, and the simulation calculation was carried out by artificial synthesis of space-related ground motion input self-compiled program based on the spectral method. The effects of traveling wave, site and incoherence on the dynamic response of TBS were studied systematically. The calculation shows that the three kinds of spatial variability of ground motion have significant influence on the dynamic response of TBS. Among them, the train safety index decreases with the increase of traveling wave speed, and the most disadvantageous traveling wave speed is 250 m/s. The dynamic response of TBS increases sharply with the increase of the site type of the bridge tower. The de-coherence effect will reduce the dynamic response of the car-bridge system, and has the greatest influence on the centroid acceleration of the car body. After considering the three kinds of spatial variability, the derailment coefficient, wheel unloading rate and wheel axle lateral force will increase by 13.4%, 13.9% and 8.3%, respectively. The research achievements of this paper can provide theoretical support for the design of LRCB with steel truss girder.

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备注/Memo

备注/Memo:
收稿日期:2021-11-29;改回日期:2022-02-18。
基金项目:国家自然科学基金项目(51878173);福建省自然科学基金项目(2020J01883)
作者简介:雷虎军(1986-),男,副教授,博士,主要从事车-桥耦合振动及桥梁抗震研究.E-mail:leihujun@yeah.net
更新日期/Last Update: 1900-01-01