偏心荷重下转动浅基承载力的严密解法

›› 2008, Vol. 29 ›› Issue (11): 2957-2961.

偏心荷重下转动浅基承载力的严密解法

姜朋明¹，陆长锋¹，梅国雄²，倪俊³，袁华荣³

1. 江苏科技大学土木工程系，江苏镇江 212003；2. 南京工业大学土木学院，南京 210019；3. 镇江市地质矿产研究所，江苏镇江212003

收稿日期:2007-09-21 出版日期:2008-11-10 发布日期:2013-08-07
作者简介:姜朋明，男，1970年生，博士研究生，副教授，主要从事土体极限分析和岩土力学数值计算
基金资助:
国家自然科学基金（No.50608038）；镇江市社会发展项目（No.SH2007074）。

Rigorous solution method for bearing capacity of rotating ground under eccentric loads

JIANG Peng-ming¹, LU Chang-feng¹, MEI Guo-xiong², NI Jun³, YUAN Hua-rong³

1. Department of Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China; 2. College of Civil Engineering, Nanjing University of Technology, Nanjing 210019, China, 3. Zhenjiang Institute of Geology for Mineral Resources, Zhenjiang 212003, China

Received:2007-09-21 Online:2008-11-10 Published:2013-08-07

摘要/Abstract

摘要： 根据偏心荷载作用下地基失稳的特征，构建了偏心荷重下地基极限状态时土体中不连续应力场和速度场，分析了土体中不连续应力场和速度场的特点。基于上、下限原理的推论，建立计算模型，构建求解地基极限承载力的算法，通过解三类边值问题，求得偏心荷重下转动浅基极限承载力的严密解，该解满足刚性基础转动的速度边界和其他已知的边界条件。算例表明解垂直偏心荷载下地基极限平衡问题的解法是可行的，且结论可靠。

关键词: 极限分析, 地基承载力, 滑移线, 上下限定理

Abstract: Based on the characters of ground failure under eccentric loads, the discontinuous stress fields and discontinuous velocity fields are constructed. The characters of discontinuous lines of stress and velocity are analyzed. By upper and lower bound theorems, the model of calculation and the method for bearing capacity are given. The stress fields and the corresponding mobile fields are obtained by the numerical calculation to solve three kinds of boundary value problems. The stress fields satisfied with all velocity boundaries are found. The rigorous solution of bearing capacity under eccentric loads is solved. The computation results show that the method proposed to solve the limit equilibrium problem is available.

Key words: limit analysis, bearing capacity, slip line, upper and lower bound theorems

中图分类号:

O 241

姜朋明，陆长锋，梅国雄，倪俊，袁华荣 . 偏心荷重下转动浅基承载力的严密解法[J]. , 2008, 29(11): 2957-2961.

JIANG Peng-ming , LU Chang-feng , MEI Guo-xiong , NI Jun , YUAN Hua-rong . Rigorous solution method for bearing capacity of rotating ground under eccentric loads[J]. , 2008, 29(11): 2957-2961.

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