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首页> 外文期刊>Applied Mathematical Modelling >The interactive vibration behavior in a suspension bridge system under moving vehicle loads and vertical seismic excitations
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The interactive vibration behavior in a suspension bridge system under moving vehicle loads and vertical seismic excitations

机译：车辆运动和垂直地震激励下悬索桥系统的相互作用振动行为

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摘要

In this paper, the vibration behavior of a suspension bridge due to moving vehicle loads with vertical support motions caused by earthquake is studied. The suspension bridge system is presented here by two coupled nonlinear cable-beam equations aiming to describe both the dynamic characteristics for the supporting cable and the roadbed, respectively. The dynamic effect of traffic vehicles are modeled as a row of equidistant moving forces, while the earthquake movement is simulated as the vertical oscillation of boundary supports. The governing integro-differential equations are transferred into a set of ordinary differential equations, which can be solved analytically in the present study. Furthermore, the world's largest designed suspended bridge - Messina Bridge - is examined (central span of length 3.3 km) and the modified Kobe earthquake records is applied to the calculations in order to validate the present study and the proposed methodology. As a result, the deformation of the cable produces more oscillations than that of the beam since the material property of the cable is more flexible. It is shown that the interaction of both the moving loads and the seismic forces can substantially amplify the response of long-span suspension bridge system especially in the vicinity of the end supports.
机译：本文研究了由于地震引起的具有垂直支撑运动的车辆荷载引起的悬索桥的振动行为。悬索桥系统通过两个耦合的非线性电缆-梁方程式呈现，旨在分别描述支撑电缆和路基的动力特性。交通车辆的动力效应被建模为一排等距的移动力，而地震运动被模拟为边界支撑的垂直振动。控制积分微分方程被转换为一组常微分方程，在本研究中可以通过解析来解决。此外，检查了世界上最大的设计的悬索桥-墨西拿桥-（中心跨度为3.3 km），并将修改后的神户地震记录应用于计算，以验证本研究和提出的方法。结果，电缆的变形比梁的变形产生更多的振动，这是因为电缆的材料特性更柔韧。结果表明，运动载荷和地震力的相互作用可以显着放大大跨度悬索桥系统的响应，尤其是在端部支撑附近。

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  • 来源
    《Applied Mathematical Modelling》 |2011年第1期|p.398-411|共14页
  • 作者

    M.-F. Liu; T.-P. Chang; D.-Y. Zeng;

  • 作者单位

    Department of Applied Mathematics, I-Shou University, Kaohsiung, Taiwan, ROC;

    Department of Construction Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan, ROC;

    Department of Construction Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan, ROC;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    suspension bridge; coupled nonlinear cable-beam equations; moving vehicle loads; earthquake;

    机译：悬索桥;耦合非线性索梁方程;移动车辆载荷;地震;

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