... random wave causes greater agitation within the harbor basin comparing to the regular wave. The effect of cross-anisotropic soil behavior on the seabed response is significant and the conventional models for the isotropic seabed overestimates the maximum liquefaction depth. INTRODUCTION Breakwaters...

..., the soil response induced by the action of breaking waves around a monopile is discussed, and then the potential of instantaneous seabed liquefaction near the pile foundation is further evaluated. Numerical examples demonstrate the free surface water elevation and the distribution of seabed liquefaction...

...., propagate forward from the inlet boundary. The numerical simulation consequences manifested that the maximum value of the pore pressure and soil liquefaction depth became greater in the irregular wave system, compared with the cases with regular waves. Furthermore, the random distribution of the fluid...

... will be addressed in this paper. This will include geotechnical aspects like determination of the seismic loading, damping and liquefaction. Another focus area will be the seismic load calculation and the details of combining the earthquake impact with wind and wave loads acting on the wind turbine...

... Abstract A numerical study has been carried out to investigate the effects of the wave nonlinearity on the seabed instantaneous response and liquefaction. One analytical formula considering the nonlinear wave skewness and asymmetry, is adopted to provide the wave pressure on the seabed surface...

... earthquakeproof berth, but we propose that fishing ports also be used as disaster prevention bases. In this study, we investigated the liquefaction countermeasures for fishing port quay using sheet piles. As a result, ①It finds out that the construction method using sheet piles is not enough for liquefaction...

... Valley Silt, which is a dominate soil type throughout the Willamette Valley, is prone to liquefaction or strength loss during earthquake motion, because it is a relatively low-plasticity silt. Many of Oregon's transportation lifelines, bridges, and emergency roadways are founded on Willamette Valley Silt...

... was backfilled inside and outside of the geogrid was effective for reducing the displacement rate of the pipe. KEYWORDS: Shaking table test; buried pipe bend; thrust force; geogrid; gravel; liquefaction INTRODUCTION Large earthquakes have occurred frequently in Japan, for example, the 2018 Hokkaido Eastern Iburi...

... seabed has seldom been investigated. By combining standing waves, the Biot s consolidation theory and the sand constitutive model for post-liquefaction behavior by Zhang s research group, an elasto-plastic method was proposed. This method is capable of simulating oscillatory and residual pore pressures...

... on the distribution of excess pore-water pressure near the pipeline, which further affects the occurrence of seabed liquefaction. Based on the proposed model, four different engineering options for offshore pipeline protection are examined through numerical simulation. INTRODUCTION Many offshore structures have...

... =0.04mm). Results show that the buried soil reduces the excess pore pressure around pipeline and provides a degree of resistance to seabed liquefaction, and the excess pore pressure around the circumference of pipeline or beneath the pipeline is larger in the coarser backfill sand, and decreases...

.... However, the soil liquefaction occurs and the lateral subgrade stiffness drastically reduces during the significant earthquake. The superstructure's overturning moment is also caused by the building's inertia force and the slender steel pile may experience the higher axial compression force. Thus...

... ABSTRACT The damage to retaining walls due to liquefaction of the backfill can be effectively reduced by the distributive installation of piles into the backfill. In this study, the author focused on the effect of rigidity of the piles on the effectiveness of this countermeasure. Through the 3...

... of coastal and offshore engineering systems. Geotechnical considerations are particularly important in identifying the conditions leading to instability of such seabed-structure systems under cyclic excitations. Among those, liquefaction, shear failure and excessive deformations are the most common causes...

... ABSTRACT In the present paper, the liquefaction potential and the change in effective stress associated with the gap between the water pressure on the ground surface and the pore water pressure in the ground induced by tsunami inundation have been numerically studied. From the numerical...

... installed in liquefiable soil. A monopile is modelled in the 3D finite element software package PLAXIS 3D, where a soil model able to capture liquefied soil behavior is applied. The numerical results are used to extract relevant data to assess liquefaction in the soil. Based on this information, p - y...

... ABSTRACT In order to reduce the liquefaction damage to detached house during earthquakes, it is essential to predict the damage using inexpensive and simple methods. Therefore, in this study, authors proposed numerical method and some ground survey methods. From the reproduction analysis using...

... trench seabed surface clay content experiment wave height pore water pressure clayey soil interaction mixed bed accumulation reservoir characterization pore pressure wave-seabed interaction engineering liquefaction net upward pressure gradient upstream oil & gas...

... ABSTRACT A simple numerical method has been proposed to predict tilting and settlement of detached house due to ground liquefaction. SPH ( S moothed P article H ydrodynamics) scheme was used for this object. In order to confirm the validity of the proposed numerical tool, we carried...

.... Pipelines placed on an erodible seabed may undergo several kinds of destroys when exposed to sufficiently strong waves/currents. One potential danger is the wave-induced liquefaction in a porous seabed, which may cause damaging instability of buried pipelines, like sinking or floatation (Dunlap et al., 1979...