| 深厚饱和软土场地中透镜体对上部结构地震响应的影响 |
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| 引用本文： | 韩冰,梁建文,朱俊.深厚饱和软土场地中透镜体对上部结构地震响应的影响[J].岩土力学,2018,39(6):2227-2236. |
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| 作者姓名： | 韩冰 梁建文 朱俊 |
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| 作者单位： | 1. 天津大学 水利工程仿真与安全国家重点实验室，天津 300350；2. 天津大学 土木工程系，天津 300350 |
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| 基金项目： | 国家自然科学基金项目（No.51578372） |
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| 摘 要： | 工程场地中透镜体对地震动具有明显的影响，且饱和场地与相应干土场地的地震响应具有明显的差别，而目前对于深厚饱和软土场地中透镜体对地震响应的影响还鲜有研究。采用有限元-间接边界元耦合法，建立饱和场地中非线性土-结构动力相互作用模型，对深厚饱和软土场地中透镜体的宽度、厚度和埋深对上部结构动力响应的影响进行了系统地分析，并着重讨论了土骨架-孔隙水耦合作用的影响。研究表明，深厚饱和软土场地中的透镜体可能会明显改变上部结构的动力响应；透镜体的宽度、厚度和埋深对上部结构动力响应有不同程度的影响，且与干土场地中规律存在明显差异；土骨架-孔隙水耦合作用对上部结构动力响应的影响显著。
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| 关 键 词： | 深厚饱和软土场地 有限元-间接边界元耦合法 透镜体 土-结构动力相互作用 地震响应 土骨架-孔隙水耦合作用 |
| 收稿时间： | 2016-10-10 |
Effect of lenticle on seismic response of structures in deep water-saturated poroelastic soft site |
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| HAN Bing,LIANG Jian-wen,ZHU Jun.Effect of lenticle on seismic response of structures in deep water-saturated poroelastic soft site[J].Rock and Soil Mechanics,2018,39(6):2227-2236. |
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| Authors: | HAN Bing LIANG Jian-wen ZHU Jun |
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| Institution: | 1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China; 2. Department of Civil Engineering, Tianjin University, Tianjin 300350, China |
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| Abstract: | A lenticle existing in engineering site affacts significantly on the earthquake ground motion. There exists obvious difference between the seismic response of water-saturated poroelastic site and the corresponding dry site. However, there are few studies in literature on influence of lenticle on seismic response in deep water-saturated poroelastic soft site up to now. Using finite element and indirect boundary element coupled method (FEM-IBEM), this paper investigates the effect of width, thickness and embedded depth of a lenticle on dynamic structural response by the nonlinear dynamic saturated soil-structure interaction model, and particularly analyzes the effect of dynamic coupling effect between solid frame and pore water. The lenticle width, thickness and embedded depth show different effects on the structural response, resulting in obvious difference with those of a lenticle in dry site. The dynamic coupling effect between solid frame and pore water has significant effect on seismic response of the structure. |
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| Keywords: | deep water-saturated poroelastic soft site FEM-IBEM coupled method lenticle dynamic soil-structure interaction seismic response dynamic coupling effect between solid frame and pore water |
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