| Numerical Analyses of Bearing Opacity of Deep-Embedded Large-Diameter Cylindrical Structure on Soft Ground Against Lateral Loads |
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| 引用本文： | 栾茂田 范庆来. Numerical Analyses of Bearing Opacity of Deep-Embedded Large-Diameter Cylindrical Structure on Soft Ground Against Lateral Loads[J]. 中国海洋工程, 2006, 20(4): 623-634 |
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| 作者姓名： | 栾茂田 范庆来 |
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| 作者单位： | [1]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China [2]Institute of C, eotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China |
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| 基金项目： | This project is supported by the National Natural Science Foundation of China （Grant Nos. 50579006, 50639010 and 50179006）Acknowledgements-The authors wish to express their gratitude to Professor Dahong QIU of Dalian University of Technology for his continuing support and invaluable advice for the investigation. |
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| 摘 要： | Presented in this paper is a three-dimensional plastic limit analysis method of bearing capacity of the deeply-embedded large-diameter cylindrical structure in the cross-anisotmpic soft ground. The most likely failure mechanism is assumed to be of a composite rupture surface which is composed of an individual wedge in the passive zone or two wedges in both active and passive zones near the mudline, depending on the separation or bonding state at the interface between the cylindrical structure and neighboring soils in the active wedge, and a truncated spherical slip surface at the base of the cylinder when the structure tends to overturn around a point located on the symmetry axis of the structure. The cylindrical structure and soil interaction system under consideration is also numerically analyzed by the finite element method by virtue of the general-purpose FEM software ABAQUS, in which the soil is assumed to obey tie Hill＇s criterion of yield. Both the failure mechanism assumed and the plastic limit analysis predictions are validated by numerical computations based on FEM. For the K0-consolidated ground of clays typically with anisotropic undrained strength property, it is indicated through a parametric study that limit analysis without consideration of anisotropy of soil overestimates the lateral ultimate bearing capacity of a deeply-embedded cylindrical structure in soft ground in a certain condition.
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| 关 键 词： | 软土地基 大直径圆柱结构 深埋 侧向负荷 支撑力 FEM 数值分析 |
| 收稿时间： | 2006-02-08 |
| 修稿时间： | 2006-09-20 |
Numerical Analyses of Bearing Opacity of Deep-Embedded Large-Diameter Cylindrical Structure on Soft Ground Against Lateral Loads |
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| LUAN Mao-tian, FAN Qing-lai. Numerical Analyses of Bearing Opacity of Deep-Embedded Large-Diameter Cylindrical Structure on Soft Ground Against Lateral Loads[J]. China Ocean Engineering, 2006, 20(4): 623-634 |
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| Authors: | LUAN Mao-tian FAN Qing-lai |
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| Abstract: | |
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| Keywords: | cylindrical structure limit analysis of plasticity soil anisotropy soft ground FEM |
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