...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Water >A New Practical Method to Simulate Flood-Induced Bridge Pier Scour—A Case Study of Mingchu Bridge Piers on the Cho-Shui River
【24h】

A New Practical Method to Simulate Flood-Induced Bridge Pier Scour—A Case Study of Mingchu Bridge Piers on the Cho-Shui River

机译：模拟洪水引起的桥墩冲刷的一种实用新方法-以长水河明初桥墩为例

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The evolution of bridge pier scour is very important for bridge safety warning and assessment. During typhoon seasons in Taiwan, the torrential river flow often causes scour monitoring instruments to fail in their attempt to measure the temporal variations of pier scour depths. To better understand the scouring phenomenon during a large flood event, this study proposes a fast and reliable method for bridge pier scour simulation. The proposed method consists of two main components: (1) a robust finite-volume hydraulic model that simulates the flow depth and velocities; and (2) two scour depth computation algorithms that predict the temporal development of the general and local scour depths. The greatest advantage of this method is that it is very straight-forward and reliable, giving bridge managers sufficient time to make an informed decision for bridge safety warning. Only a few hydraulic flow conditions near the bridge are necessary to simulate the scour depth evolution. Moreover, the method can be applied for both general and local scour simulations. To demonstrate the accuracy of the proposed method, field data collected using the “numbered-brick” method were performed at the Mingchu Bridge, which is located along an incised channel reach of the Cho-Shui River in Taiwan. The simulated water levels and total scour depths are in good agreements with the field data. Finally, to help bridge authorities responsible for making a decision towards bridge scour warning, a bridge safety curve (scoured bed level-discharge relationship) is proposed. Based on the results of two flood events, the study shows that the proposed method can quickly and accurately simulate the bridge pier scour.
机译：桥墩冲刷的演变对桥梁安全预警和评估非常重要。在台湾台风季节，洪流经常导致冲刷监测仪器无法测量码头冲刷深度的时间变化。为了更好地理解大洪水事件中的冲刷现象，本研究提出了一种快速可靠的桥墩冲刷模拟方法。所提出的方法包括两个主要部分：（1）鲁棒的有限体积水力模型，模拟水深和​​流速。 （2）两种冲刷深度计算算法，可预测一般冲刷深度和局部冲刷深度的时间变化。这种方法的最大优点是它非常简单和可靠，使桥梁管理员有足够的时间做出明智的桥梁安全警告决策。为了模拟冲刷深度的演变，仅需在桥梁附近的几个液压流动条件即可。此外，该方法可以应用于一般和局部冲刷模拟。为了证明所提方法的准确性，在台湾楚水河切入河道沿明渠桥的明初桥进行了使用“数字砖”法收集的现场数据。模拟的水位和总冲刷深度与现场数据吻合良好。最后，为帮助负责桥梁冲刷警告决策的桥梁主管部门提出桥梁安全曲线（冲刷床层水位与流量的关系）。根据两次洪水事件的结果，研究表明，该方法可以快速，准确地模拟桥墩冲刷。

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