| 倾斜与偏心荷载作用下裙板式基础破坏包络面研究 |
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| 引用本文： | 范庆来,宫秀滨,栾茂田.倾斜与偏心荷载作用下裙板式基础破坏包络面研究[J].岩土力学,2010,31(Z2):43-47. |
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| 作者姓名： | 范庆来 宫秀滨 栾茂田 |
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| 作者单位： | 1. 鲁东大学 岩土工程重点实验室，山东 烟台 264025；2. 大连理工大学 海岸和近海工程国家重点实验室，辽宁 大连 116024 |
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| 基金项目： | 国家自然科学基金资助项目（No.50909048, No.50639010）；鲁东大学博士科研启动项目(No.LY20075602, No.LZ20085604)。 |
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| 摘 要： | 联合采用Swipe加载模式与固定位移比加载模式,对裙板式浅基础在倾斜与偏心荷载两种加载条件下的承载性能进行了比较系统的平面应变有限元分析,主要探讨了裙板式基础埋深、地基土不排水强度的非均质性对基础在竖向荷载V与水平荷载H、竖向荷载V与弯矩M加载平面内的破坏包络面的影响,揭示了地基在不同荷载分量组合条件下的失稳破坏机制。结果表明,基础埋深与地基土强度的非均质性对于地基失稳模式有较大影响,但V-H和V-M平面内的破坏包络面形状具有较好的归一化特性,并分别建议了裙板式基础在倾斜和偏心荷载作用下的破坏包络面方程。
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| 关 键 词： | 裙板式基础 破坏包络面 倾斜荷载 偏心荷载 非均质 |
| 收稿时间： | 2010-07-29 |
Failure envelope of skirted foundation under inclined loading and eccentric loading |
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| FAN Qing-lai,GONG Xiu-bi,LUAN Mao-tian.Failure envelope of skirted foundation under inclined loading and eccentric loading[J].Rock and Soil Mechanics,2010,31(Z2):43-47. |
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| Authors: | FAN Qing-lai GONG Xiu-bi LUAN Mao-tian |
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| Institution: | 1. Key Laboratory of Geotechnical Engineering, Ludong University, Yantai, Shandong 264025, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China |
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| Abstract: | Combined with Swipe loading method and fixed displacement ratio method, the bearing capacity of shallow skirted foundations subjected to inclined loading and eccentric loading is explored through plane strain finite element numerical studies. The effect of embedment and soil strength profiles on the V-H and V-M failure envelope of skirted foundations is investigated; and the soil deformation mechanism under various combinations of load components is illustrated. The results show that the embedment ratios and soil strength profiles significantly affects the failure mechanisms, but normalization of the failure envelope on the V-H and V-M load plane by the pure bearing capacities allowed it to be generalized for other varying conditions. The equation of failure envelope on the V-H and V-M loading plane is proposed respectively. |
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| Keywords: | skirted foundation failure envelope inclined loading eccentric loading nonhomogeneity |
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