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Fatigue damage of steel bridge girders due to dynamic vehicle loads.

机译：动态车辆载荷会导致钢桥梁的疲劳损伤。

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摘要

This study focuses on the amount of fatigue damage caused in steel bridge girders from dynamic tire forces caused during the crossing of heavy transport vehicles.; The fatigue lives of a bridge designed to illustrate the 3rd edition of the Ontario Highway Bridge Design Code (OHBDC) and an Australian bridge tested in the OECD DIVINE project are evaluated. The bridges considered in this study are particularly susceptible to dynamic loads and should be critical for fatigue damage.; The bridges are modelled as beams to obtain their modal properties, and non-linear air-sprung and steel-sprung vehicle models are used. Bridge responses are predicted using a convolution method by combining bridge modal properties with vehicle wheel forces. Vehicle speeds in the range of 10 to 25 m/s and three different surface profiles are considered. A Linear Elastic Fracture Mechanics (LEFM) model is used to predict crack growth at the mid-span of the bridge girders. Changes in bridge modal properties from crack development in the girders are studied. Fatigue life is also computed using a stress-life method, and is compared to results from the linear elastic fracture mechanics model. (Abstract shortened by UMI.)
机译：这项研究的重点是在重型运输车辆横穿时由动态轮胎力引起的钢制桥梁大梁的疲劳损伤量。评估了用来说明《安大略省公路桥梁设计规范》（OHBDC）第三版的桥梁的疲劳寿命，以及在经合组织DIVINE项目中测试的澳大利亚桥梁的疲劳寿命。本研究中考虑的桥梁特别容易受到动态载荷的影响，因此对于疲劳损伤至关重要。将桥梁建模为梁以获得其模态特性，并使用非线性空气弹簧和钢弹簧车辆模型。通过将桥梁模态特性与车轮力相结合，使用卷积方法来预测桥梁响应。车速在10至25 m / s的范围内，并考虑了三种不同的表面轮廓。线性弹性断裂力学（LEFM）模型用于预测桥梁大梁中跨处的裂纹扩展。研究了由于大梁裂缝发展而引起的桥梁模态特性的变化。疲劳寿命也可以使用应力寿命方法进行计算，并与线性弹性断裂力学模型的结果进行比较。 （摘要由UMI缩短。）

著录项

  • 作者

    Shillinglaw, Scott Glenn.;

  • 作者单位

    Queen's University at Kingston (Canada).;

  • 授予单位 Queen's University at Kingston (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.Sc.(Eng)
  • 年度 2003
  • 页码 157 p.
  • 总页数 157
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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