A model for investigating vehicle-bridge interaction under high moving speed

IF 2.2 4区工程技术 Q2 ENGINEERING, CIVIL

Structural Engineering and Mechanics Pub Date : 2021-03-01 DOI:10.12989/SEM.2021.77.5.627

Li Hanyun, Yu Zhiwu, W. Guo, Yan Han

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引用次数: 3

Abstract

The speed of rail vehicles become higher and higher over two decades, and China has unveiled a prototype highspeed train in October 2020 that has been able to reach 400 km/h. At such high speeds, wheel-rail force items that had previously been ignored in common computational model should be reevaluated and reconsidered. Aiming at this problem, a new model for investigating the vehicle-bridge interaction at high moving speed is proposed. Comparing with the common model, the new model was more accurate and applicable, because it additionally considers the second-order pseudo-inertia forces effect and its modeling equilibrium position was based on the initial deformed curve of bridge, which could include the influences of temperature, pre-camber, shrinkage and creep deformation, and pier uneven settlement, etc. Taking 5 km/h as the speed interval, the dynamic responses of the classical vehicle-bridge system in the speed range of 5 km/h to 400 km/h are studied. The results show that ignoring the second-order pseudo-inertia force will underestimate the dynamic response of vehicle-bridge system and make the high-speed railway bridge structure design unsafe.

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高速行驶条件下车桥相互作用的研究模型

20年来，轨道车辆的速度越来越高，中国于2020年10月推出了一款时速可达400公里的高速列车原型。在如此高的速度下，以前在通用计算模型中被忽略的轮轨力项目应该重新评估和考虑。针对这一问题，提出了一种研究高速行驶时车桥相互作用的新模型。与普通模型相比，新模型更加准确和适用，因为它额外考虑了二阶拟惯性力效应，其建模平衡位置基于桥梁的初始变形曲线，其中可以包括温度、预拱、收缩和蠕变变形以及桥墩不均匀沉降等的影响。以5km/h为速度区间，研究了经典车桥系统在5km/h至400km/h速度范围内的动力响应。结果表明，忽略二阶拟惯性力会低估车桥系统的动力响应，使高速铁路桥梁结构设计变得不安全。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structural Engineering and Mechanics 工程技术-工程：机械

CiteScore

3.80

自引率

18.20%

发文量

审稿时长

11 months

期刊介绍： The STRUCTURAL ENGINEERING AND MECHANICS, An International Journal, aims at: providing a major publication channel for structural engineering, wider distribution at more affordable subscription rates; faster reviewing and publication for manuscripts submitted; and a broad scope for wider participation. The main subject of the Journal is structural engineering concerned with aspects of mechanics. Areas covered by the Journal include: - Structural Mechanics - Design of Civil, Building and Mechanical Structures - Structural Optimization and Controls - Structural Safety and Reliability - New Structural Materials and Applications - Effects of Wind, Earthquake and Wave Loadings on Structures - Fluid-Structure and Soil-Structure Interactions - AI Application and Expert Systems in Structural Engineering. Submission of papers from practicing engineers is particularly encouraged.