单索面曲线人行桥人致振动及减振控制
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作者单位:

(1. 长沙理工大学 土木工程学院,湖南 长沙,410114;2. 湖南省高速公路集团有限公司,湖南长沙 410022;3. 四川公路桥梁建设集团有限公司大桥分公司,四川 成都,610041)

作者简介:

通讯作者:

胡绵远(1995—),男,长沙理工大学硕士生。E-mail:799271599@qq.com

中图分类号:

U448.11

基金项目:

国家自然科学基金面上项目(52078057);湖南省自然科学基金创新研究群体项目(2020JJ1006)


Study on vibration damping control of a single-cable curved footbridge induced by pedestrian
Author:
Affiliation:

(1.College of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, China;2.Hunan Provincial Expressway Group Co., Ltd., Changsha 410022,China;3.Sichuan Highway and Bridge Construction Group Co., Ltd., Chengdu 610041,China)

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    摘要:

    单索面曲线人行桥自振频率若处在行人步频范围,则人与桥梁容易发生共振。依据德国人行桥设计指南EN03规范,考虑人群驻足效应,对某人行桥进行人致振动及舒适度分析。研究结果表明:人群驻足效应会使桥梁结构的自振频率减小,该桥模态5与模态6的竖向频率为1.25 ~2.30 Hz,需进行竖向人致振动加速度响应分析;考虑人群驻足效应前,模态5与模态6对应的行人舒适度级别分别为CL4和CL3,需进行减振控制;在设置TMD装置后,模态5与模态6在各工况下的行人舒适度均满足能达到德国人行桥设计指南EN03规范舒适度CL1等级要求。

    Abstract:

    The natural frequency of the single cable plane curved footbridge tends to be in the pedestrian step frequency range, and the resonance phenomenon between people and the bridge is prone to occur. According to the German Pedestrian Bridge Design Guide EN03, the pedestrian induced vibration and comfort analysis of a footbridge is carried out considering the stopping effect of the crowd. The results show that the crowd stopping effect will reduce the natural frequency of the bridge structure; The vertical frequencies of the bridge mode 5 and mode 6 are between 1.25 Hz and 2.30 Hz, so the vertical pedestrian induced vibration acceleration response analysis is required; Before and after considering the crowd stopping effect, the pedestrian comfort levels corresponding to mode 5 and mode 6 are CL4 and CL3 respectively, so vibration damping control is required; After the TMD device is installed, the comfort level requirements of CL1 are met under each working condition of mode 5 and mode 6.

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引用本文

胡绵远,董新梅,明德江,等.单索面曲线人行桥人致振动及减振控制[J].交通科学与工程,2024,40(1):68-78.
HU Mianyuan, DONG Xinmei, MING Dejiang, et al. Study on vibration damping control of a single-cable curved footbridge induced by pedestrian[J]. Journal of Transport Science and Engineering,2024,40(1):68-78.

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  • 收稿日期:2021-12-19
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  • 在线发布日期: 2024-03-19
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