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Earthquake response of wrap faced embankment on soft clay soil in Bangladesh
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作者 Ripon Hore Sudipta Chakraborty +2 位作者 Kamruzzaman Kamrul Ayaz Mahmud Shuvon Mehedi AAnsary 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2023年第3期703-718,共16页
A wrap-faced embankment model on soft clay soil subjected to earthquake motion was investigated in this study.The study was conducted both experimentally using a shaking table and numerically using PLAXIS 3D software.... A wrap-faced embankment model on soft clay soil subjected to earthquake motion was investigated in this study.The study was conducted both experimentally using a shaking table and numerically using PLAXIS 3D software.The amplification of acceleration,displacement,pore water pressure,and strain response were measured while varying input accelerations and surcharge pressures.Time histories of the Kobe record of the 1995 Hanshin earthquake were used as the input seismic motion.The input acceleration was 0.05 g,0.1 g,0.15 g,and 0.2 g,and different surcharge pressures were 0.70 kPa,1.12 kPa,and 1.72 kPa with relative density of Sylhet sand fixed to 48%.The output data from the shaking table tests and the numerical analysis performed through the PLAXIS 3D software were compared,and these findings were also compared with some earlier similar studies.The acceleration amplification,displacement,pore water pressure,and strain(%)changed along the elevation of the embankment and acceleration response increased with the increase in base acceleration.The increase was more noticeable at higher elevations.These findings enrich the knowledge of predicting the dynamic behavior of wrap-faced embankments and enable the design parameters to be adjusted more accurately. 展开更多
关键词 shaking table test soft clayey soil kobe earthquake seismic wave wrap-faced soil embankment
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Calibrating partial factors for Danish railway embankments using probabilistic analyses
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作者 Michael R.Lodahl Kristian T.Brdbk Carsten S.Srensen 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2014年第2期150-155,共6页
High costs are connected with upgrading railway embankments throughout Denmark using the partial factors for geotechnical design calibrated for general application. One way to reduce the costs is reliability-based cal... High costs are connected with upgrading railway embankments throughout Denmark using the partial factors for geotechnical design calibrated for general application. One way to reduce the costs is reliability-based calibration of the partial factors to a reasonable safety level taking into account the specific design situations and uncertainties relevant to railway embankments. A reliability-based design has been investigated, resulting in an optimal partial factor for the considered subsoil. With a stochastic soil model to simulate the undrained shear strength of soft soil deposits, the partial factor is calibrated using asymptotic sampling for the reliability assessment. The calibration shows that the partial factor can be reduced significantly compared to the value specified in the Danish National Annex to DS/EN 1997-1 (2007), Eurocode 7. 展开更多
关键词 Railway embankment Reliability index Partial factor Stochastic soil modelling
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