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MDOF extension of the Modified Bridge System method for vehicle–bridge interaction
Nonlinear Dynamics ( IF 5.2 ) Pub Date : 2020-11-20 , DOI: 10.1007/s11071-020-06022-6
Charikleia D. Stoura , Elias G. Dimitrakopoulos

This study examines the effect of vehicle–bridge interaction (VBI) on the vibration of coupled train–bridge systems and proposes a consistent approach to decouple the VBI problem; the Extended Modified Bridge System (EMBS) method. This constitutes an extension of the formerly developed, for simply supported bridges, Modified Bridge System method. The analysis considers a generic, multi-degree of freedom (MDOF) vehicle–MDOF bridge configuration, representative of a wide class of practical train–bridge systems. This approach enables the MDOF representation of the constituent VBI mechanisms on the mechanical system of the bridge. Based on an asymptotic expansion analysis of the coupled system response, the study brings forward the dominant coupling parameters and their relative importance on the bridge response. The proposed decoupling EMBS method solves the bridge independently of the vehicle by changing its mechanical system via additional damping, stiffness and loading terms. The MDOF description of these terms makes the proposed scheme appropriate for involved bridge configurations, such as continuous and arch bridges. In addition, it allows the accurate estimation of the deck acceleration of bridges, which is an important serviceability limit state. Numerical examples demonstrate the accuracy and efficiency of the EMBS method compared with the solution of the fully coupled system and other decoupling methodologies. Lastly, the proposed approach is simpler than the coupled analysis, which can be of particular importance in bridge design practice.



中文翻译:

车桥相互作用的修正桥梁系统方法的MDOF扩展

这项研究研究了车桥相互作用(VBI)对耦合的车桥系统振动的影响,并提出了一种一致的方法来解决VBI问题。扩展的修改桥梁系统(EMBS)方法。这构成了以前开发的,用于简单支撑桥梁的改进桥梁系统方法的扩展。该分析考虑了通用的多自由度(MDOF)车辆-MDOF桥梁配置,代表了一系列实用的火车-桥梁系统。这种方法使MDOF可以代表桥梁机械系统上的VBI机构。在耦合系统响应的渐近展开分析的基础上,提出了主导耦合参数及其在桥梁响应中的相对重要性。所提出的解耦EMBS方法通过附加的阻尼,刚度和载荷项来更改其机械系统,从而独立于车辆解决了桥梁问题。这些术语的MDOF描述使建议的方案适用于所涉及的桥梁配置,例如连续和拱形桥梁。另外,它允许准确估计桥梁的甲板加速度,这是重要的使用寿命极限状态。数值算例说明了与完全耦合系统和其他解耦方法相比,EMBS方法的准确性和效率。最后,所提出的方法比耦合分析更简单,这在桥梁设计实践中尤其重要。刚度和载荷条件。这些术语的MDOF描述使所提出的方案适用于所涉及的桥梁配置,例如连续和拱形桥梁。另外,它允许准确估计桥梁的甲板加速度,这是重要的使用寿命极限状态。数值算例说明了与完全耦合系统和其他解耦方法相比,EMBS方法的准确性和效率。最后,所提出的方法比耦合分析更简单,这在桥梁设计实践中尤其重要。刚度和载荷条件。这些术语的MDOF描述使建议的方案适用于所涉及的桥梁配置,例如连续和拱形桥梁。另外,它允许准确估计桥梁的甲板加速度,这是重要的使用寿命极限状态。数值算例说明了与完全耦合系统和其他解耦方法相比,EMBS方法的准确性和效率。最后,所提出的方法比耦合分析更简单,这在桥梁设计实践中尤其重要。它可以准确估计桥梁的甲板加速度,这是重要的使用寿命极限状态。数值算例说明了与完全耦合系统和其他解耦方法相比,EMBS方法的准确性和效率。最后,所提出的方法比耦合分析更简单,这在桥梁设计实践中尤其重要。它可以准确估计桥梁的甲板加速度,这是重要的使用寿命极限状态。数值算例说明了与完全耦合系统和其他解耦方法相比,EMBS方法的准确性和效率。最后,所提出的方法比耦合分析更简单,这在桥梁设计实践中尤其重要。

更新日期:2020-11-21
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