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Earthquake response of wrap faced embankment on soft clay soil in Bangladesh
Earthquake Engineering and Engineering Vibration ( IF 2.8 ) Pub Date : 2023-07-14 , DOI: 10.1007/s11803-023-2194-8
Ripon Hore , Sudipta Chakraborty , Kamruzzaman Kamrul , Ayaz Mahmud Shuvon , Mehedi A. Ansary

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.



中文翻译:

孟加拉国软土包覆路堤的地震响应

本研究对地震作用下软粘土上的包面路堤模型进行了研究。该研究使用振动台进行实验,并使用 PLAXIS 3D 软件进行数值研究。在改变输入加速度和附加压力时测量加速度、位移、孔隙水压力和应变响应的放大。1995 年阪神地震的神户记录的时程被用作输入地震运动。输入加速度分别为0.05 g、0.1 g、0.15 g、0.2 g,不同堆载压力分别为0.70 kPa、1.12 kPa、1.72 kPa,锡尔赫特砂相对密度固定为48%。比较了振动台测试的输出数据和通过 PLAXIS 3D 软件进行的数值分析,并且这些发现还与一些早期的类似研究进行了比较。加速度放大率、位移、孔隙水压力和应变(%)沿路堤高程变化,且加速度响应随基底加速度的增大而增大。在海拔较高的地区,这种增加更为明显。这些发现丰富了预测包面路堤动态行为的知识,并使设计参数的调整更加准确。

更新日期:2023-07-14
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