纵横向受荷基桩变形内力的矩阵传递解

发布时间：2018-06-16 11:44

本文选题：土体屈服 + 地基反力系数　；参考：《岩土力学》2014年11期

【摘要】：针对地基的土体屈服性状,将桩侧土体分为弹性变形区域与塑性变形区域两种情况。假定地基反力系数为3参数的一般形式,同时考虑桩身P??效应并计入桩身自重、桩侧摩阻力的影响,根据地基反力法分别建立桩身弹性段和塑性段挠曲线微分方程。在解微分方程的过程中,采用矩阵传递法结合Laplace正逆变换的方法解得桩顶作用轴向力、水平力、弯矩时桩身内力和变形的矩阵传递解,并用Fortran语言编制了相应计算程序。最后将试验数据对上述方法进行验证,结果表明计算值与模型试验的实测值吻合很好,采用文中3参数地基反力法反算所得的地基参数离散性很小,研究结果具有较高的应用价值。
[Abstract]:According to the soil yield behavior of the foundation, the soil around the pile is divided into elastic deformation region and plastic deformation region. Assuming that the reaction coefficient of the foundation is a general form of 3 parameters, and considering the pile body? According to the foundation reaction method, the differential equations of flexural curve of elastic section and plastic section of pile body are established according to the foundation reaction method. In the course of solving the differential equation, the matrix transfer solution of the axial force, horizontal force and bending moment of the pile is obtained by using the matrix transfer method combined with Laplace forward and inverse transformation. The corresponding calculation program is compiled with Fortran language. Finally, the experimental data are used to verify the above method. The results show that the calculated values are in good agreement with the measured values of the model test, and the dispersion of the foundation parameters obtained by the inverse calculation of the three parameters in the paper is very small. The results have high application value.
【作者单位】：东南大学土木工程学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;中交公路规划设计院有限公司;
【基金】：国家科技支撑计划项目(No.2011BAG07B01) 国家重点基础研究发展计划(No.2013CB036304)
【分类号】：TU473.1

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