Experimental and numerical investigation on tsunami run-up flow around coastal buildings
Experimental and numerical investigation on tsunami run-up flow around coastal buildings
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沿海建筑物周围海啸上升流的实验和数值研究
DOI：
10.1080/21664250.2021.1949920
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发表时间：
2021
影响因子：
2.4
通讯作者：
Shibayama Tomoya
中科院分区：
文献类型：
--
作者：
Ishii Hidenori;Takabatake Tomoyuki;Esteban Miguel;Stolle Jacob;Shibayama Tomoya
沿海建筑物的存在会对内陆海啸流产生很大影响。本研究通过实验和数值研究了九种不同建筑布局对 1）海啸淹没过程和空间速度分布、2）特定点的水流深度和速度以及 3）发生屏蔽效应的区域范围的影响。高速视频片段、PIV 分析以及水流深度、表面速度和动量通量的时间历史表明，所考虑的不同建筑布局之间的海啸助跑行为存在显着差异。然而，研究还表明，无论建筑物的布局如何，表面流速的降低总是出现在建筑物的前面和后面。 OpenFOAM 模拟显示，建筑物的背风处出现了显着的屏蔽效应。这些发现可用于考虑在何处放置疏散建筑，因为将它们直接建造在另一个研究结构后面可以降低建筑成本并提高其稳定性。获得的结果还用于部分验证 ASCE 7-16 中提供的计算海啸载荷沟道效应的方法。
Inland tsunami flows can be greatly affected by the presence of coastal buildings. The present study experimentally and numerically investigated the effects of nine different building layouts on 1) the tsunami inundation process and spatial velocity distribution, 2) the flow depth and velocity at a specific point, and 3) the extent of the area where shielding effects take place. High-speed video footage, PIV analysis, and the time history of flow depth, surface velocity and momentum flux demonstrated significant differences in the tsunami run-up behavior among the different building layouts considered. However, it was also shown that a decrease in the surface velocity of flow always appears in front of and immediately behind the building(s), regardless of their layouts. The OpenFOAM simulations performed revealed that significant shielding effects appear in the leeside of the building. These findings can be used when considering where to place evacuation buildings, as constructing them directly behind another study structure could reduce construction costs and increase their stability. The obtained results were also applied to partially validate the method for calculating the channeling effects of tsunami loads provided in ASCE 7–16.