| 波浪加速度不对称性对海床液化的影响 |
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| 引用本文： | 陈俊东,张弛,隋倜倜,郑金海. 波浪加速度不对称性对海床液化的影响[J]. 水利水电科技进展, 2016, 36(4): 20-24 |
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| 作者姓名： | 陈俊东 张弛 隋倜倜 郑金海 |
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| 作者单位： | 河海大学海岸灾害及防护教育部重点实验室, 江苏 南京 210098; 河海大学港口海岸与近海工程学院, 江苏 南京 210098,河海大学海岸灾害及防护教育部重点实验室, 江苏 南京 210098; 河海大学港口海岸与近海工程学院, 江苏 南京 210098,河海大学海岸灾害及防护教育部重点实验室, 江苏 南京 210098; 河海大学港口海岸与近海工程学院, 江苏 南京 210098,河海大学海岸灾害及防护教育部重点实验室, 江苏 南京 210098; 河海大学港口海岸与近海工程学院, 江苏 南京 210098 |
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| 基金项目： | 国家自然科学基金(51209082,51209083)；江苏省普通高校研究生科研创新计划(#CXLX11_0450) |
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| 摘 要： | 为研究加速度不对称波浪作用下的海床响应特征,基于Biot多孔弹性介质理论建立了波浪作用下海床响应数学模型,采用水槽实验数据对模型进行了验证。通过引入加速度不对称波浪压力边界条件的计算方法,模拟分析了波浪加速度不对称性对海床内部孔隙水压力、有效应力以及土体液化的影响。结果表明,波浪加速度不对称性会引起海床表层正向孔压幅值的显著衰减,使孔压的空间分布变得偏斜,减小了液化深度和宽度,使海床液化区域变得窄而浅。
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| 关 键 词： | 波浪；加速度不对称；海床响应；孔隙水压力；液化 |
| 收稿时间： | 2015-07-01 |
Effects of wave acceleration asymmetry on seabed liquefaction |
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| CHEN Jundong,ZHANG Chi,SUI Titi and ZHENG Jinhai. Effects of wave acceleration asymmetry on seabed liquefaction[J]. Advances in Science and Technology of Water Resources, 2016, 36(4): 20-24 |
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| Authors: | CHEN Jundong ZHANG Chi SUI Titi ZHENG Jinhai |
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| Affiliation: | Key Laboratory of Coastal Disaster and Defence(Hohai University), Ministry of Education, Nanjing 210098, China; College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,Key Laboratory of Coastal Disaster and Defence(Hohai University), Ministry of Education, Nanjing 210098, China; College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,Key Laboratory of Coastal Disaster and Defence(Hohai University), Ministry of Education, Nanjing 210098, China; College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China and Key Laboratory of Coastal Disaster and Defence(Hohai University), Ministry of Education, Nanjing 210098, China; College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | In order to study the influence of wave acceleration asymmetry on seabed response, a numerical model of wave-induced seabed response was developed based on the Biot theory of poroelasticity, and the model was validated against the measured data from flume experiments. A method of calculating wave pressure boundary conditions on the seabed surface, which considers wave acceleration asymmetry, is introduced. Effects of wave acceleration asymmetry on pore water pressures, effective stresses, and soil liquefaction of the seabed are discussed based on numerical simulation. Results show that wave acceleration asymmetry considerably reduces the peak value of the positive pore water pressure in the surface soil layer of the seabed, modifies the spatial distribution pattern of the pore water pressure, and eventually leads to decreases in both the depth and width of seabed liquefaction. |
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| Keywords: | wave acceleration asymmetry seabed response pore water pressure liquefaction |
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