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Keywords: soil 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-21-4114
... Abstract The lateral spreading due to the soil liquefaction induced by an earthquake causes a large deformation of buried pipelines and leads to axial pipe strain, which may result in failure. This paper proposes a simplified formula for the tensile strain of a buried pipeline subjected...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-495
..., the developing process of soil liquefaction around the pipeline and differences of dynamic responses in the three models were investigated. INTRODUCTION Flotation of buried pipeline caused by the occurrence of soil liquefaction under severe wave motions has been reported and investigated by Christian et al...
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-18-295
... the wave- and earthquake- induced excess pore pressures accumulate and fluctuate but with different rates and amplitudes. INTRODUCTION In the ocean environment, the interaction of pipeline and seabed as well as the occurrence of soil liquefaction around the pipeline under dynamic loadings like...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-628
...The Study of Risk Assessment of Soil Liquefaction on Land Development and Utilization in Taiwan Jing-Ping Wu, Lien-Kwei Chien Coastal Disaster Prevention Research Center, National Taiwan Ocean University Keelung, TAIWAN Wen-Chien Tseng National Center for Research on Earthquake Engineering...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-193
... pressure generation model pore pressure generation model normalized pore water-pressure ratio liquefaction experimental condition soil liquefaction loading pore pressure generation process equation seabed soil reservoir characterization forecasting curve wave loading experiment A New Model...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-204
... on liquefaction potential of undisturbed high fines content non-plastic silty sand. Laboratory tests on the liquefaction resistance of non-plastic silty sand that emphasized on the influence of fines content percentages are conducted. It concludes that soil liquefaction would occur in non-plastic silty sand...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-252
... on. The phenomenon is usually occurred in saturated loose sandy soils which are more vulnerable to liquefaction damage. If it is possible to presume undrained cyclic strength by means of ground investigation, risks of liquefaction could be predictable. In this paper, a simple estimation method of soil liquefaction...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-278
.... Compared with the Artificial Neural Network (ANN)–based method, the SVM-based method has the advantage of increased accuracy and simpler operation. The experimental results show that an SVM can increase the classification accuracy rate to a standard of 98.7%. INTRODUCTION Soil liquefaction is a vital...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-449
... ABSTRACT: Soil liquefaction is a common type of ground failure, such as sand boiling, settlement and lateral spreading, during an earthquake. Susceptibility evaluation of liquefaction is thus an important issue for earthquake disaster prevention. The establishment of liquefaction fragility...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-100
... A simplified procedure is developed to evaluate dynamic behavior of buried pipe during earthquake. In the procedure, an empirical method developed by Seed, Tokimatsu et al. (1985, 1987) is used to evaluate soil liquefaction with Iwasaki et al. (1982). Pressure on the pipe is calculated by Iimura...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-441
... pipeline deformation strength line pipe wall thickness displacement strain capacity diameter hot bend ground movement ground displacement proceedings soil liquefaction piping design strain demand midstream oil & gas piping simulation lateral reservoir characterization...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-413
... Both the model and parameter uncertainties should be taken into consideration for evaluation of soil liquefaction potential during earthquake. The paper aims to develop a new method to quantify the model uncertainty of the simplified method. The proposed method is constructed by the random...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-438
... to simulate the complicated conditions. The revetment of a sea levee which found on a thick deposit with saturated loose sand may collapse or slide soil liquefaction as deposit subjected by earthquake force. The results also revealed that the hazards caused by a earthquake are not damage of the levee itself...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-439
... Isolation and Pre-dewatering, to increase performance of DC method. INTRODUCTION In the past decade since 1995 Hyogoken-Nanbu Earthquake in Japan and 1999 Chi-Chi Earthquake in Taiwan, the soil liquefaction became a very hot issue among the field of seismic design of the buildings or facilities. Many...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-296
... ABSTRACT For providing more convenient analysis method of soil liquefaction evaluation, the local soil parameters with the liquefied case in 921 Chi- Chi earthquake was discussed. The earthquake force considered in this study was the active fault of Taiwan and the data processing in large...
Proceedings Papers

Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-232
... in the upward direction); and finally Ripples form on the surface of the bed after the compaction process is completed. upward direction soil liquefaction liquefaction mud line buildup fredsøe soil behaviour jørgen fredsøe ripple time series pressure begin pore pressure sequence reservoir...
Proceedings Papers

Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-233
... problem and obtain the global optimal solution (Goldberg, 1989). In this research, the influence of various parameters in evaluation model is quantified by genetic algorithm and safety factor of soil liquefaction is approximated. machine learning optimization problem fuzzy logic coefficient...

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