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针对目前粘土地层中大直径单桩P-y曲线研究较少的现状,本文用自主开发数值软件DBLEAVES对粘土中单桩水平加载离心机试验的桩-土相互作用模型进行了三维有限元分析。有限元计算采用了非关联流动法则的Drucke-Prager。(简称D-P)弹塑性本构模型。同时用API规范方法进行了桩基受力变形分析。通过对比数值计算、API规范方法和离心机试验结果,证明了DBLEAVES计算方法能更好地描述试验结果,进一步比较不同深度下数值计算得到的P-y曲线和API规范的P-y曲线,探讨了本文所提出方法和API规范方法的差异。
In view of the current research on the P-y curve of single-pile with large diameter in clay, the finite element analysis of the pile-soil interaction model of single-pile horizontal loading centrifuge in clay is carried out by using the self-developed numerical software DBLEAVES. Finite element calculations using the Drucke-Prager non-associated flow rule. (D-P) elasto-plastic constitutive model. At the same time, the deformation analysis of pile foundation was carried out by API standard method. By comparing numerical calculation, API standard method and centrifuge test results, it is proved that DBLEAVES calculation method can better describe the experimental results, and further compare the Py curve calculated by the numerical calculation at different depths with the Py curve of the API specification. Differences in method and API specification methods.