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提出了一种半解析半数值方法 ,该方法可用于计算埋置于多层土中单桩的荷载位移非线性分析 ,在本文中 ,采用了两种理论模型来构造单桩的传递函数 ,第一种模型为双曲线模型 ,用于计算桩土界面处的剪应力与其相对位移的非线性关系 ,第二种模型为Randolph所提出的理论解 ,用于确定桩周土中的剪应力和位移场 .对现场试验结果和有限元分析结果进行了比较后说明 ,按本文所建议的方法所得的三种计算结果 (荷载位移曲线 ,荷载沿深度的荷载分布曲线 ,桩端土的荷载发挥曲线 )与实测值之间能达到相当满意的精度 ,证明了本文所提方法的可靠性和准确性 .此外 ,根据本文所提的构造传递函数的方法 ,考虑桩对桩 ,桩对土 ,承台对桩的相互影响 ,可以构造出考虑桩 土 台共同作用的传递函数 ,近而可以计算分析桩 土 台共同作用 .
A semi-analytical semi-numerical method is proposed, which can be used to calculate the nonlinear load-displacement analysis of single pile embedded in multi-layered soil. In this paper, two theoretical models are used to construct the transfer function of single pile. One model is a hyperbolic model that is used to calculate the nonlinear relationship between shear stress and its relative displacement at the pile-soil interface. The second model is the theoretical solution proposed by Randolph for determining the shear stress and displacement fields in the soil around the pile. After comparing the field test results with the finite element analysis results, it is shown that the three calculated results (load displacement curve, load distribution curve along load depth and load curve of pile tip soil) We can get quite satisfactory accuracy between the values and prove the reliability and accuracy of the proposed method.In addition, according to the method of constructing transfer function mentioned in this paper, considering the pile-to-pile, pile-to-soil, Interact with each other to construct a transfer function that takes into account the interaction between pile and soil, and then calculate and analyze the interaction between pile and soil.