| Influences of nonassociated flow rules on seismic bearing capacity factors of strip footing on soil slope by energy dissipation method |
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| 作者姓名： | 杨小礼 郭乃正 赵炼恒 邹金锋 |
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| 作者单位： | School of Civil and Architectural Engineering Central South University，School of Civil and Architectural Engineering Central South University，School of Civil and Architectural Engineering Central South University，School of Civil and Architectural Engineering Central South University，Changsha 410075 China，Changsha 410075 China，Changsha 410075 China，Changsha 410075 China |
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| 基金项目： | 教育部全国优秀博士学位论文作者专项基金;教育部跨世纪优秀人才培养计划 |
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| 摘 要： | Seismic bearing capacity factors of a strip footing placed on soil slope were determined with both associated and nonassociated flow rules. Quasi-static representation of earthquake effects using a seismic coefficient concept was adopted for seismic bearing capacity calculations. A multi-wedge translational failure mechanism was used to obtain the seismic bearing capacity factors for different seismic coefficients and various inclined angles. Employing the associated flow rule, numerical results were compared with the published solutions. For bearing capacity factors related to cohesion and equivalent surcharge load, the maximum difference approximates 0.1%. However, the difference of bearing capacity factor related to unit weight is larger. With the two flow rules, the seismic bearing capacity factors were presented in the form of design charts for practical use. The results show that seismic bearing capacity factors related to the cohesion, the equivalent surcharge load and the unit weight increase greatly as the dilatancy angle increases, and that the nonassociated flow rule has important influences on the seismic bearing capacity.
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| 关 键 词： | 地震 方位 容量 能量消耗 |
| 收稿时间： | 12 May 2007 |
| 修稿时间： | 2007-05-12 |
Influences of nonassociated flow rules on seismic bearing capacity factors of strip footing on soil slope by energy dissipation method |
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| Yang Xiao-li , Guo Nai-zheng , Zhao Lian-heng and Zou Jin-feng.Influences of nonassociated flow rules on seismic bearing capacity factors of strip footing on soil slope by energy dissipation method[J].Journal of Central South University of Technology,2007,14(6):842-847. |
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| Authors: | Yang Xiao-li Guo Nai-zheng Zhao Lian-heng and Zou Jin-feng |
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| Affiliation: | School of Civil and Architectural Engineering, Central South University, Changsha 410075, China |
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| Abstract: | Seismic bearing capacity factors of a strip footing placed on soil slope were determined with both associated and nonassociated flow rules. Quasi-static representation of earthquake effects using a seismic coefficient concept was adopted for seismic bearing capacity calculations. A multi-wedge translational failure mechanism was used to obtain the seismic bearing capacity factors for different seismic coefficients and various inclined angles. Employing the associated flow rule, numerical results were compared with the published solutions. For bearing capacity factors related to cohesion and equivalent surcharge load, the maximum difference approximates 0.1%. However, the difference of bearing capacity factor related to unit weight is larger. With the two flow rules, the seismic bearing capacity factors were presented in the form of design charts for practical use. The results show that seismic bearing capacity factors related to the cohesion, the equivalent surcharge load and the unit weight increase greatly as the dilatancy angle increases, and that the nonassociated flow rule has important influences on the seismic bearing capacity. |
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| Keywords: | nonassociated flow rule seismic bearing capacity factor earthquake |
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