...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of bridge engineering >Fatigue Design of Steel Bridges Considering the Effect of Dynamic Vehicle Loading and Overloaded Trucks
【24h】

Fatigue Design of Steel Bridges Considering the Effect of Dynamic Vehicle Loading and Overloaded Trucks

机译：考虑车辆动态载荷和超载卡车影响的钢桥疲劳设计

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

The current practice for bridge-fatigue design may have underestimated the effect of dynamic vehicle loading and truck overloading on the fatigue life of steel bridges. In this study, a new approach for fatigue design of steel bridges was proposed that considers the effect of these two factors more rationally. A three-dimensional vehicle-bridge coupled model was developed to simulate the interaction between the bridge and vehicle. A simply supported steel I-girder bridge was used as an example for illustration of the proposed approach. The fatigue vehicle model was adopted from the AASHTO LRFD code, and overloading was considered by increasing the gross weight of the truck model. Numerical simulations were conducted to study the influence of three important parametersroad surface condition (RSC), vehicle speed, and truck gross weighton the fatigue damage of the bridge considered. The results show that the RSC and truck gross weight both have a significant impact on the bridge-fatigue damage. By considering the cumulative fatigue damage caused by each truck passage under different RSCs and the deterioration process of the RSC during its whole lifecycle, a simple and reasonable expression was proposed for bridge-fatigue design. The proposed approach improves the current bridge-fatigue design method in that it rationally considers the vehicle dynamic effect, the influence of overloaded trucks, and the deterioration of RSC, which have a large influence on bridges' fatigue life.
机译：桥梁疲劳设计的当前实践可能低估了动态车辆装载和卡车超载对钢桥疲劳寿命的影响。在这项研究中，提出了一种新的钢桥疲劳设计方法，该方法更加合理地考虑了这两个因素的影响。建立了三维车桥耦合模型，以模拟桥和车辆之间的相互作用。以简单支撑的钢工字梁桥为例来说明所提出的方法。从AASHTO LRFD代码采用疲劳车辆模型，并通过增加卡车模型的总重来考虑超载。进行了数值模拟，以研究三个重要参数路面状况（RSC），车速和卡车总重对所考虑桥梁的疲劳损伤的影响。结果表明，RSC和卡车的毛重均对桥梁疲劳损伤有重大影响。考虑到每个卡车通道在不同的RSC下造成的累积疲劳损伤以及RSC在其整个生命周期中的退化过程，提出了一种简单合理的桥梁疲劳设计表达式。所提出的方法改进了当前的桥梁疲劳设计方法，因为它合理地考虑了车辆动力效应，超载卡车的影响以及RSC的恶化，这对桥梁的疲劳寿命有很大的影响。

著录项

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