International Travel Grant for Survey of Structural Damage from the September 2009 Samoan Islands Tsunami

2009年9月29日，地震引发的海啸对美属萨摩亚和西萨摩亚群岛的沿海建筑造成了广泛的破坏。来自这些岛屿的现场数据可能会为校准实验和数值模型以及设计指南提供宝贵的证据，这些模型和设计指南是在目前由美国国家科学基金会资助的题为“NEESR-SG：基于性能的海啸工程的发展”(NEESR-SG：基于性能的海啸工程的发展)项目(授予CMMI-0530759)下制定的。为了补充PbTe项目下正在进行的研究，一个七人小组将实地调查受影响的萨摩亚群岛的结构破坏以及空中和海底冲刷影响。实地考察团队由4名PbTe研究人员、1名实习结构工程师、1名本科生和1名研究生组成。实地调查将在2009年11月的第一周进行。这一时间表允许收集对时间敏感的数据，并从海啸淹没和空中冲刷和山体滑坡勘测员那里学习，而不会干扰目前正在进行的救济和恢复工作。与卡特里娜飓风后现场小组成员进行的调查类似，这项调查打算收集和保存数据，以(1)与数值模拟进行比较，(2)更新风险模型数据库，(3)制定改造和设计建议，以及(4)提高对流体、结构和沉积物相互作用的动力学的了解，这对堤坝和广泛的沿海结构的总体设计和改造至关重要。实地调查的结果将记录在一份侦察报告中。此外，该小组将对萨摩亚海啸和卡特里娜飓风调查的数据和分析结果进行比较，并将调查结果记录在期刊论文中。

The September 29, 2009, earthquake-induced tsunami caused extensive damage to coastal structures on the American Samoan and the Western Samoan islands. Field data from these islands may provide invaluable evidence for calibration of the experimental and numerical models and design guidelines being developed under the current NSF-supported NEES research (NEESR) project entitled "NEESR-SG: Development of Performance Based Tsunami Engineering, (PBTE)," (award CMMI-0530759). To supplement the on-going research under the PBTE project, a seven-member team will field survey the structural damage and aerial and submarine scour effects of the affected Samoan islands. The field survey team consists of four PBTE researchers, a practicing structural engineer, and one undergraduate and one graduate student. The field survey will be performed during the first week of November 2009. This schedule allows for collection of time-sensitive data and learning from tsunami inundation and aerial scour and landslide surveyors without interfering with the relief and recovery efforts currently underway. Similar to a survey conducted by members of the field team after Hurricane Katrina, this survey intends to collect and preserve data to (1) compare against numerical simulations, (2) update the database for risk models, (3) develop retrofit and design recommendations, and (4) improve the understanding of the dynamics of fluid, structure, and sediment interactions, which is critical to the general design and retrofit of levees, dams, and a wide range of coastal structures. The results of the field survey will be documented in a reconnaissance report. In addition, the team will perform a comparison of the data and analysis results obtained from the Samoan tsunami with those from the Hurricane Katrina survey and document the findings in a journal paper.