【作者】 李晓俊；

【导师】 白晓红；

【作者基本信息】 太原理工大学 ， 岩土工程， 2005， 硕士

【摘要】 本文通过土工带加筋碎石大型三轴试验,分析了土工带加筋碎石的变形特性和比较了不同加筋层数对土工带加筋碎石的性能的影响。采用ANSYS软件建立加筋地基的计算模型,根据非线性计算的原理方法,利用APDL语言编制加筋地基非线性分析的二次开发程序,其中将加筋碎石土垫层看成宏观均匀的复合材料,碎石与土工带的作用表现为内力而不对其进行具体的应力分析,加筋碎石土的本构关系采用非线性弹性模型Ducan-Chang模型。 根据不同荷载工况,进行加筋地基的非线性静力分析,绘制相应于各级荷载下的竖向沉降、等效应力等图形。探讨加筋软土地基内应力分布规律,并进行有无加筋的对比分析,研究士工合成材料的加筋机理。 通过有限元计算和原位载荷试验结果比较表明,本文加筋垫层采用的Duncan-Chang模型来分析加筋复合地基是更多还原

【Abstract】 The deformation characteristics of geobelt reinforced cushion are analyzed through several groups of triaxial tests and the effect on properties of geobelt reinforced cushion with different reinforcement parameters are compared.The model of reinforced foundation is built by the software - ANSYS. According to the theory of nonlinear finite element,a program about reinforced foundation is designed by use of APDL language from ANSYS. In the program, the reinforced foundation is considered as a compound material, the interaction between geobelt and crushed gravel is ignored, the constitutive model of reinforced cushion is presented by nonlinear elastic model - DUCAN-CHANG model.According to different load levels, the curves of settlement and equivalent stress distribution are drawn through nonlinear static analysis of reinforced foundation. The reinforcementmechanism is analyzed. The calculation result shows that the simulate results are close to the results of in-situ test, the program is farely accurate .The width and height of the reinforced cushion is changed in order to forecast mechanic properties and reinforcement effect of the reinforced cushion in contrast to the different size. Some conclusions are drawn to provide the theorial basis for the engineering.更多还原