Development of Estimation Method of Tsunami Wave Pressure Exerting on Land Structure Using Depth-Integrated Flow Model

Arimitsu, Tsuyoshi; Kawasaki, Koji

doi:10.1142/s0578563416400210

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…As one could observe, with the increase in the height of the wall, the pressure profile changes from near-linear variation to parabolic shape, similar to the theoretical pressure profile shape of Cumberbatch [77] and Kihara et al [74]. For Wall 7, one could observe a localized high pressure at the bottom level of the structure, which results in a reduced moment on the structure, similar to observations by Arimitsu and Kawasaki [38]. The change in the pressure profile shape also brings down the location of the lever arm.…”

Section: Effect Of H Ssupporting

confidence: 85%

“…Interestingly, the overturning moment on the inland structure decreases exponentially with the increase in hs/hf,wall. The variation in the trend between force and moment can be related to the reduction in overtopping depth and the increase in the Fr with the increases in hs, which result in localized high pressure at the structure bottom level, as pointed out by Arimitsu and Kawasaki [38]. This phenomenon brings down the lever arm (LA) and hence the reduced moment.…”

Section: Effect Of H Smentioning

confidence: 91%

“…A high-rise mitigation wall induces local high pressure at the structure bottom, thereby reducing the lever arm and hence the moment. This is closely related to the reduced overtopped surge depth and increased Fr of the overtopping surge [38].…”

mentioning

confidence: 85%

“…Herein, the impact moment is not appreciable as an impact force, indicating the high-pressure impact at the structure bottom level as observed in Figure 12c for the LRC (i.e., the lever arm, L A is very small). Furthermore, the pressure distribution indicates that the pressure is no longer hydrostatic at the structure front (Figure 12c) due to the high Fr of the overtopped bore [38].…”

Section: Flow Overtopping and Force Characteristicsmentioning

confidence: 99%

“…Arimitsu and Kawasaki [38] varied the seawall height and location of the inland structure to understand the flow and pressure characteristics at the structure front. With the increase in the h s , the overtopped inundation depth decreased, whereas the Froude number (Fr) of the overtopped flow increased.…”

Section: Introductionmentioning

confidence: 99%

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Tsunami-like Flow-Induced Forces on the Landward Structure behind a Vertical Seawall with and without Recurve Using OpenFOAM

Harish

Sriram

Schüttrumpf

et al. 2022

Water

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It is more common to introduce the parapet/recurve/wave return wall over the existing structure, such as a vertical seawall or composite structure, to reduce the overtopping efficiently. The advantage of a recurve wall on top of the sea wall has been studied in the past in regards to wave interaction and overtopping. However, their efficiency in protecting the inland structure during extreme events such as flooding during a tsunami is unexplored. The present study addresses the effect of a vertical seawall with recurve in reducing the dam break surge simulating tsunami-induced forces on an inland structure. The study compares the momentum transferred on the landward structure behind a Vertical seaWall (VW) and a vertical wall with the Large ReCurve on the top (LRC) during overtopped conditions. The outcome from the numerical simulation shows an insignificant contribution due to the LRC in reducing the force on the inland structure compared to the VW, albeit delaying the impact time. However, the LRC performed slightly better in the case of a low-rise wall located near the inland structure than the VW. Furthermore, a low-rise VW increases the force and overturning moment on the inland structure compared to no-wall conditions. Both the LRC and the VW reduced the horizontal force on the structure linearly with the increase in height. An exponential decrease in the overturning moment was observed on the landward structure with the increase in the height of the VW or the LRC. Design equations are proposed for the forces and overturning moment reduction based on the height of the VW or the LRC.

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Section: Effect Of H Ssupporting

confidence: 85%

Section: Effect Of H Smentioning

confidence: 91%

mentioning

confidence: 85%

Section: Flow Overtopping and Force Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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