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有限填土体主动土压力的理论解析
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摘要
根据实际工况建立了有限填土体主动土压力分析模型,在填土体与结构物之间接触面为滑裂面的基础上,考虑有限填土体与结构物接触面具有应变硬化与应变软化力学性质的基础上,基于尖点突变理论推导了有限填土体主动土压力的计算公式。通过一个算例研究了主要参数对有限填土主动土压力强度分布的影响。算例结果表明:有限填土体主动土压力强度根据参数取值的不同可以呈线性分布也可以呈非线性分布。随参数G2、m、u0、α的增大"非线性"现象愈来愈明显。
According to the actual conditions, analysis model for Active Soil Pressure from Finite Soil Body has been designed. Soil-structure Inter face is considered to be slide plane in analysis model. Based on the catastrophetheory,a formula for calculating active Soil Pressure from Finite Soil Body is deduced with the consideration of Mechanical properties of Strain hardening and strain softening in Soil-structure Inter face. A numerical example is provided in which the effect of main parameters in this formula on distribution of active earth pressure strength is studied. The results indicate distribution of active earth pressure strength can be linear or nonlinear. The nonlinearity distribution of active earth pressure strength becomes more and more obvious with the increase of G2、m、u0 and α.
引文
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