Saving up to 100 Million Dollars Per Year by Mitigating Bridge Flood Damage

通过减轻桥梁洪水损失每年节省高达 1 亿美元

• 批准号: 9360793
• 负责人: Alan Bilanin
• 金额: $ 6.48万
• 依托单位: Continuum Dynamics, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9360793&HistoricalAwards=false
• 关键词: Saving; up; 100; Million; Dollars

9360793 Bilanin The erosion of the river bed around bridge piers is commonly known as local scour and is induced by the recalculating juncture flow at the intersection of the pier and the river bed. Bridge failure caused by this phenomenon has long been an important issue with respect to both public safety and maintenance costs. Average total losses from the resulting damage can run up to a hundred million dollars annually. Nearly half a million bridges nationwide are potentially affected by local scour. A robust protective system is needed that can be retrofitted to existing bridge piers to mitigate the sediment transport. Recently, Continuum Dynamics, Inc. has made considerable progress in designing large-scale flow modification devices based on the successful in-house development of vortex control technology. The proposed effort will adapt these techniques together with the appropriate application of scaling and boundary layer analyses of the vortical flow near the river bed to the development of vortex alleviation systems for local scour mitigation. Various designs will be tested experimentally with sub-scale models to demonstrate the potential of the proposed vortex alleviation techniques in mitigating local scour and to identify a feasible design for Phase II. ***

桥墩周围河床的侵蚀通常被称为局部冲刷，它是由桥墩与河床交点处重新计算的节理水流引起的。由这种现象引起的桥梁破坏长期以来一直是关系到公共安全和维护成本的重要问题。由此造成的损失平均每年可达1亿美元。全国近50万座桥梁可能受到当地冲刷的影响。需要一个强大的保护系统，可以对现有的桥墩进行改造，以减轻沉积物的运输。最近，Continuum Dynamics, Inc.在成功开发旋涡控制技术的基础上，在设计大型流动调节装置方面取得了长足的进展。建议的工作将使这些技术与河床附近涡流的标度和边界层分析的适当应用相结合，以开发用于局部冲刷缓解的涡缓解系统。不同的设计将用亚尺度模型进行实验测试，以证明所提出的缓解涡旋技术在减轻局部冲刷方面的潜力，并为第二阶段确定可行的设计。＊＊＊