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圆形基础极限分析下限解探讨 被引量:3

Discussion about lower-bound analytical solution of circular foundation bearing capacity using limit analysis method
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摘要 下限分析中常用的应力柱是一种二维应力柱 ,本文提出三维应力柱概念以及圆形基础下限解的计算方法。根据应力叠加原理构造静力容许的应力场 ,求出不同应力柱数目下圆形基础的下限解。通过比较看出 ,本文计算结果与前人研究成果很接近 ,说明本文提出方法的有效性和正确性。 The objective of the research presented in this paper is to develop a computational method for limit analysis problems that involve the determination of lower-bound analytical solution of bearing capacity of circular foundation under external loads. In general, the lower-bound limit analysis is characterized by construction of two-dimensional stress field. However, the concept of three-dimensional stress leg is proposed to construct statically admissible stress fields according to the theory of stress field overlapping, and the lower-bound solutions of circular foundation are obtained under situations of different numbers of stress legs. The results is approximate to the previous achievements, which demonstrates the efficiency and correctness of computational method presented.
作者 杨小礼 李亮
出处 《铁道学报》 EI CAS CSCD 北大核心 2001年第6期77-80,共4页 Journal of the China Railway Society
关键词 三维应力柱 静力容许应力场 下限定理 圆形基础 极限荷载 极限分析法 计算 岩土结构物 circular foundation three-dimensional stress leg statically admissible stress field lower-bound theorem
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  • 1龚小南.土塑性力学[M].杭州:浙江大学出版社,1990..
  • 2赵彭年.散体介质力学[M].北京:地震出版社,1995..
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  • 5Chen W F,Limit Analysis and Soil Plasticity,1975年

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