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Keywords: liquefaction
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Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-1206
... 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...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2152
... 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...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2229
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-530
... to liquefaction. Ariyoshi et al. (2012) and Mohri et al. (2014) investigated seismic damage of agricultural facilities such as agricultural pipeline caused by the 2011 Tohoku earthquake and reported that liquefaction of the backfill material around buried pipes led damage of pipeline including uplifting of pipes...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-495
... ABSTRACT Standing wave-induced interaction of seabed-pipeline in the elasto-plastic saturated sandy 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-055
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-095
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-155
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-727
... Numerical study on pile countermeasure against liquefaction behind retaining wall Kakuta Fujiwara Dept. of Engineering, Tokai University Hiratsuka-city, Kanagawa prefecture, Japan ABSTRACT The damage to retaining walls due to liquefaction of the backfill can be effectively reduced...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-708
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-695
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-157
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-138
... water pressure inside the bed. INTRODUCTION The interaction between waves and seabed soils has been considered as an important field of coastal engineering. Wave induced liquefaction of seabed soils may reduce the effective stress between the individual grains and will cause the damage to structures...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-574
... 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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-413
... =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...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-409
.... 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...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-628
... ABSTRACT Assessment of soil liquefaction potential has been widely investigated; however, no integrated method has compared the factors of vulnerability to soil liquefaction and resilience capacity between regions to assess the risk of soil liquefaction. This study selects Yunlin and Chiayi...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-211
...Liquefaction Potential Of The Liquefied Site After Dynamic Compaction Improvement Chih-Sheng Ku Guan-Lin Huang Shun-Jie Huang and Wei-Hsin Chen Department of Civil and Ecological Engineering, I-Shou University. Kaohsuing City, Taiwan China ABSTRACT This paper examines the liquefaction potential...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-132
.... 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...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-295
... was proposed by combining linear wave theory, the Biot s consolidation theory and the sand constitutive model by Zhang s research group, which is capable of reproducing the pre- and post-liquefaction behaviors of soil. This method was first validated by Miyamoto et al. s experiment. Then, numerical simulations...

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