Collaborative Research: Fundamental Mechanics and Conditional Probabilities for Prediction of Hurricane Surge and Wave Loads on Elevated Coastal Structures

合作研究：预测飓风潮和高架海岸结构波浪载荷的基本力学和条件概率

• 批准号: 1301016
• 负责人: Daniel Cox
• 金额: $ 21万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-06-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1301016&HistoricalAwards=false
• 关键词: Collaborative; Research; Fundamental; Mechanics; Conditional

Damage to coastal structures as a result of combined surge and wave loading has been significant in recent events such as Hurricane Ivan (2004), Katrina (2005) and Ike (2008) and most recently Sandy (2012). There is over $3T in built infrastructure along the US East and Gulf coasts, and elevated structures along coastal areas are becoming more commonplace as building stakeholders seek to mitigate damage and risk of property and structure loss. Currently, there are no accurate mechanics equations to compute the forces for combined surge and wave on these types of elevated structures and no comprehensive method to consistently account for the variability (uncertainty) in the random nature of the incoming waves. This project will pursue research that focuses on the impact of hurricane surge and wave loads on elevated coastal structures. The ultimate goal is to understand and quantify surge and wave loads on buildings and structures that can be used to mitigate damage to the coastal structures. A theoretical approach based on physics will be used to model the interaction between the water and coastal structure. The analytical formulation will be validated through small scale experimental testing in a wave tank. Storm surge and wave impacts will be formulated on a probabilistic basis. The results of the research can lead to performance based requirements in building standards.This collaborative project between research teams at Oregon State University and Colorado State University will combine expertise in coastal engineering and structural engineering to develop a fundamental understanding and modeling of hurricane surge and wave loads on elevated structures. The goal is to mitigate damages to shoreline infrastructures from extreme coastal storms. The analytical formulation will be built on Goda's method for calculating surge forces on elevated coastal structures and will be extended to incorporate wave forces. A probabilistic approach will be taken to combine surge and wave loads. Hydrodynamic hurricane wave and structure interaction will be used to formulate loading on these types of structures. The formulation will be validated with experiments on small scale structure models using a wave tank. The collaborative project will contribute to understanding of wave and surge loads and develop predictive equations for uplift, impact and overturning loads on elevated structures.

在最近发生的飓风伊万（2004 年）、卡特里娜飓风（2005 年）和艾克飓风（2008 年）以及最近的桑迪飓风（2012 年）等事件中，浪涌和波浪载荷联合对沿海结构造成的损害非常严重。 美国东部和墨西哥湾沿岸的已建基础设施价值超过 3T，随着建筑利益相关者寻求减轻损害以及财产和结构损失的风险，沿海地区的高架结构变得越来越普遍。 目前，没有精确的力学方程来计算这些类型的高架结构上的浪涌和波浪的组合力，也没有综合的方法来一致地解释传入波浪的随机性质的变化（不确定性）。该项目将重点研究飓风潮和波浪载荷对高架沿海结构的影响。 最终目标是了解和量化建筑物和结构上的浪涌和波浪载荷，可用于减轻对沿海结构的损害。基于物理学的理论方法将用于模拟水与海岸结构之间的相互作用。分析配方将通过波浪池中的小规模实验测试进行验证。风暴潮和波浪影响将在概率的基础上制定。研究结果可能会导致建筑标准中基于性能的要求。俄勒冈州立大学和科罗拉多州立大学的研究团队之间的这个合作项目将结合海岸工程和结构工程的专业知识，对高架结构上的飓风涌动和波浪荷载有基本的了解和建模。目标是减轻极端沿海风暴对海岸线基础设施的损害。 分析公式将建立在 Goda 计算高架沿海结构浪涌力的方法基础上，并将扩展到包含波浪力。将采用概率方法来结合浪涌和波浪载荷。水动力飓风波和结构相互作用将用于制定这些类型结构的载荷。该配方将通过使用波浪池的小规模结构模型实验进行验证。该合作项目将有助于理解波浪和浪涌载荷，并开发高架结构上的提升、冲击和倾覆载荷的预测方程。