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条形基础在水平力及弯矩作用下的稳定性突变分析
引用本文:吴艺,房营光.条形基础在水平力及弯矩作用下的稳定性突变分析[J].岩土力学,2006,27(12):2213-2218.
作者姓名:吴艺  房营光
作者单位:华南理工大学 土木工程系,广州 510640
摘    要:采用尖点突变模型理论,对考虑水平力及弯矩影响黏土地基上条形基础的稳定性进行分析,较好地解释了地基失稳时滑动位移突然增大而破坏的现象,讨论了水平力和弯矩、地基土容重和基础埋深、位移高阶效应、位移场随水平力的变化等对地基稳定性及其突变性质的影响。分析结果表明,当参数变化跨越分叉集时,地基滑动将会发生跳跃式突变而导致地基失稳破坏;不计水平力对位移场的影响时,可能会使分析结果不安全。

关 键 词:条形基础  稳定性  突变分析  
文章编号:1000-7598-(2006)12-2213-06
收稿时间:2005-03-08
修稿时间:2005年3月8日

Stability catastrophe analysis of strip foundation considering lateral force and moment effect
WU Yi,FANG Ying-guang.Stability catastrophe analysis of strip foundation considering lateral force and moment effect[J].Rock and Soil Mechanics,2006,27(12):2213-2218.
Authors:WU Yi  FANG Ying-guang
Institution:Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China
Abstract:The sudden increase of sliding displacement of base when losing stability and failing was well explained by analyzing the stability of trip foundation on clay considering lateral force and bending moment effect with cusp-catastrophe model theory. The effect of lateral force and bending moment, the density of soil and the depth of foundation, high order of displacement, the variation of displacement field with lateral force, etc. on the base’s stability and its catastrophe character was discussed. The analysis shows that when parameters go across bifurcation set, the foundation will get unstable and failed due to its sudden sliding change in a jumping style; when the variation of displacement field with lateral force is neglected, the analysis result might be unsafe.
Keywords:strip foundation  stability  catastrophe analysis
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