• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mathematical Problems in Engineering >Dynamic Analysis for Lateral Vibrations of Footbridges under Crowd Based on a Two-Degrees-of-Freedom Model
【24h】

Dynamic Analysis for Lateral Vibrations of Footbridges under Crowd Based on a Two-Degrees-of-Freedom Model

机译：基于两自由度模型的人群下人行天桥横向振动的动力分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Nakamura's model is widely used to describe lateral vibrations of a footbridge induced by crowd. The predicted responses of Nakamura's model were compared with measured data of T-bridge and M-bridge in Japan to demonstrate the validity. However, the predicted responses based on Nakamura's model almost always were stronger than measured data. Considering that both T-bridge and M-bridge are cable-stayed bridges, it seems to be not precise enough to simplify a cable-stayed bridge as a single degree of freedom system in Nakamura's model. In this paper, we establish a two-degrees-of-freedom model to describe lateral vibrations of a cable-stayed bridge. The cables have one degree, and the bridge deck has the other. Additionally, in this model we introduce a time delay in interaction between the bridge and pedestrians. By employing the center manifold theory, we find that a subcritical Hopf bifurcation occurs in the two-degrees-of-freedom model. We theoretically and numerically illustrate that the cables and time delay have significant influence on the lateral vibration amplitude of a footbridge under crowd. The appropriate increases of tension in the cables and time delay both can decrease the lateral vibration amplitude. The analysis for the proposed two-degrees-of-freedom model shows that the predicted responses of Nakamura's model can better agree with the measured date if we take the influence of cables and time delay into account.
机译：中村模型被广泛用于描述人群引起的人行天桥的横向振动。将中村模型的预测响应与日本T桥和M桥的测量数据进行比较，以证明其有效性。但是，基于Nakamura模型的预测响应几乎总是比实测数据强。考虑到T桥和M桥都是斜拉桥，在中村模型中将斜拉桥简化为单自由度系统似乎不够精确。在本文中，我们建立了一个两自由度模型来描述斜拉桥的横向振动。电缆具有一度，而桥面具有另一度。此外，在此模型中，我们引入了桥梁与行人之间互动的时间延迟。通过使用中心流形理论，我们发现在二自由度模型中发生了亚临界霍普夫分叉。我们从理论上和数值上说明，电缆和时间延迟对人群下人行天桥的横向振动幅度有显着影响。电缆中张力的适当增加和延时都会降低横向振动幅度。对所提出的两自由度模型的分析表明，如果考虑电缆和时延的影响，Nakamura模型的预测响应可以更好地与测量日期一致。

著录项

  • 来源
    《Mathematical Problems in Engineering》 |2019年第4期|7452573.1-7452573.11|共11页
  • 作者

    Zhen Bin; Qi Wenbang; Chang Liang;

  • 作者单位

    Univ Shanghai Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Univ Shanghai Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Nanchang Hangkong Univ, Sch Civil Engn & Architecture, Nanchang 330063, Jiangxi, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号