| Behavior of braced wall embedded in saturated liquefiable sand under seismic loading |
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| 作者姓名： | Sanku Konai Aniruddha Sengupta Kousik Deb |
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| 作者单位： | Department of Civil Engineering |
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| 基金项目： | Grant No.SR/S3/MERC-0029/2011 of SERB,Department of Science&Technology,New Delhi,India。 |
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| 摘 要： | It is well known that the generation of excess pore water pressure and/or liquefaction in foundation soils during an earthquake often cause structural failures.This paper describes the behavior of a small-scale braced wall embedded in saturated liquefiable sand under dynamic condition.Shake table tests are performed in the laboratory on embedded retaining walls with single bracing.The tests are conducted for different excavation depths and base motions.The influences of the peak magnitude of the ground motions and the excavation depth on the axial forces in the bracing,the lateral displacement and the bending moments in the braced walls are studied.The shake table tests are simulated numerically using FLAC 2D and the results are compared with the corresponding experimental results.The pore water pressures developed in the soil are found to influence the behavior of the braced wall structures during a dynamic event.It is found that the excess pore water pressure development in the soil below the excavation is higher compared to the soil beside the walls.Thus,the soil below the excavation level is more susceptible to the liquefaction compared to the soil beside the walls.
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| 关 键 词： | braced wall FLAC 2D LIQUEFACTION seismic analysis shake table test |
Behavior of braced wall embedded in saturated liquefiable sand under seismic loading |
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| Sanku Konai,Aniruddha Sengupta,Kousik Deb.Behavior of braced wall embedded in saturated liquefiable sand under seismic loading[J].Earthquake Engineering and Engineering Vibration,2021,20(2):361-375. |
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| Authors: | Konai Sanku Sengupta Aniruddha Deb Kousik |
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| Institution: | 1.Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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| Abstract: | It is well known that the generation of excess pore water pressure and/or liquefaction in foundation soils during an earthquake often cause structural failures. This paper describes the behavior of a small-scale braced wall embedded in saturated liquefiable sand under dynamic condition. Shake table tests are performed in the laboratory on embedded retaining walls with single bracing. The tests are conducted for different excavation depths and base motions. The influences of the peak magnitude of the ground motions and the excavation depth on the axial forces in the bracing, the lateral displacement and the bending moments in the braced walls are studied. The shake table tests are simulated numerically using FLAC 2D and the results are compared with the corresponding experimental results. The pore water pressures developed in the soil are found to influence the behavior of the braced wall structures during a dynamic event. It is found that the excess pore water pressure development in the soil below the excavation is higher compared to the soil beside the walls. Thus, the soil below the excavation level is more susceptible to the liquefaction compared to the soil beside the walls. |
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