SPH modeling of dynamic impact of tsunami bore on bridge piers

Wei, Zhangping; Dalrymple, Robert A.; Hérault, Alexis; Bilotta, Giuseppe; Rustico, Eugenio; Yeh, Harry

doi:10.1016/j.coastaleng.2015.06.008

Cited by 115 publications

(46 citation statements)

References 29 publications

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“…As one type of Lagrangian meshless method, the smoothed particle hydrodynamics (SPH) method has various advantages when considering large deformations and breaking flows [10,11]. To date, different SPH models have been widely studied and applied in the field of fluid mechanics.…”

Section: Smooth Particle Hydrodynamics Methodsmentioning

confidence: 99%

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

Wan

Gualtieri

et al. 2017

Water

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Aerated flows are characterized by complex hydrodynamics and mass-transfer processes. As a Lagrangian method, smoothed particle hydrodynamics (SPH) has a significant advantage in tracking the air-water interface in turbulent flows. This paper presents the application of an SPH method to investigate hydrodynamics and reaeration over stepped spillways. In the SPH method, the entrainment of dissolved oxygen (DO) is studied using a multiphase mass transfer SPH method for reaeration. The numerical results are compared with the hydrodynamics data from Chanson and DO data from Cheng. The simulation results show that velocity distribution and the location of free-surface aeration inception agree with the experimental results. Compared with the experimental results, the distribution of DO concentration over the stepped spillway is consistent with the measurement results. The study shows that the two-phase DO mass transfer SPH model is reliable and reasonable for simulating the hydrodynamics characteristics and reaeration process.

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Section: Smooth Particle Hydrodynamics Methodsmentioning

confidence: 99%

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

Wan

Gualtieri

et al. 2017

Water

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“…Figure 2(a) shows the overhead view of free surface profile, and Figure 2(b) shows the sideview of the wave basin. The free surface profile is detected by a method presented by , and the method is able to resolve realistic 3D breaking waves due to wave-structure interaction (Wei et al (2015), ). First, the theoretical angular deviation determined by Eq.…”

Section: Model Validationmentioning

confidence: 99%

SPH Modeling of Vorticity Generation by Short-Crested Wave Breaking

Wei

Dalrymple

2017

Int. Conf. Coastal. Eng.

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This study investigates vorticity generation by short-crested wave breaking by using the mesh-free Smoothed Particle Hydrodynamics model, GPUSPH. The short-crested waves are created by generating intersecting wave trains in a numerical wave basin with a beach. The capability of GPUSPH to simulate short-crested waves is first validated by laboratory measurements. Then we examine short-crested wave breaking with two incident wave heights H = 0.2 m and 0.3 m. The larger incident wave breaks at the toe of the planar beach, while the smaller incident wave breaks above the planar beach. The breaking wave profile, current field, nearshore circulation pattern, and vertical vorticity field due to short-crested wave breaking are carefully compared between two incident waves.

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“…On one hand, damage can be estimated deterministically based on the forces acting on a single structure (Nandasena et al 2012;Nistor et al 2009;Shimozono & Sato, 2016;Wei et al, 2015). However, this analysis could be extremely time consuming and impractical for a whole city due to the high-resolution numerical simulations (~2 m) that are required.…”

Section: Introductionmentioning

confidence: 99%

Tsunami fragility curve using field data and numerical simulation of the 2015 tsunami in Coquimbo, Chile

Aránguiz

Urra

Okuwaki

et al. 2017

Preprint

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Abstract.The last earthquake which affected Coquimbo city took place in September 2015, with localized damage observed in low areas of the city. In addition, another seismic gap north of the 2015 earthquake rupture area has been identified; therefore, a significant earthquake and tsunami could occur in the near future. The present paper develops the tsunami fragility curve for the city of Coquimbo based on field survey data and tsunami numerical simulations. The inundation depth of the 2015 Chile tsunami in Coquimbo was estimated by means of numerical simulation with the NEOWAVE model and 5 nested grids with a 15 maximum grid resolution of 10 m. The fragility curve exhibited behavior similar to that of other curves in plain areas in Japan, where low damage was observed at relatively high inundation depths. The new fragility curve was used to estimate the damage by possible future tsunamis in the area. The damage assessment showed that ~50% of the structures in the lower area of Coquimbo have a high probability of damage in case of a tsunami generated off the coast of the study area if the city is rebuilt with the same type of structures. 20

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SPH modeling of dynamic impact of tsunami bore on bridge piers

Cited by 115 publications

References 29 publications

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

SPH Modeling of Vorticity Generation by Short-Crested Wave Breaking

Tsunami fragility curve using field data and numerical simulation of the 2015 tsunami in Coquimbo, Chile

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