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Improved Analytical Method for Pile Bent Structure based on Nonlinear Characteristics

机译：基于非线性特征的桩弯结构改进分析方法

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摘要

A fundamental study of pile bent structure subjected to combined loads in multi- layered soil isrnconducted using a load transfer approach. The emphasis is on quantifying an improved analyticalrnmethod developed by considering pile’s plastic hinge. An analytical method of pile bent structure isrndeveloped by taking into account the nonlinear behavior of materials and the geometric nonlinearityrn(P-Δ effect). A series of parametric studies is performed for different soil-pile conditions. It isrnshown that the developed analytical method is capable of predicting the behavior of a pile bentrnstructure under combined loading. Based on the results obtained, the optimized column-pilerndiameter ratio can be obtained through the relations between the column-pile diameter ratio andrnnormalized lateral cracking load. Through comparisons with field case histories, the limit depth onrnthe application of minimum steel ratio proportionally decreases as normalized pile length increases,rnand beyond that the limit depth converges to a constant value (
机译：使用荷载传递方法对多层土中组合荷载作用下的桩弯结构进行基础研究。重点是通过考虑桩的塑料铰链来量化改进的分析方法。考虑材料的非线性行为和几何非线性（P-Δ效应），提出了一种弯曲弯曲桩的分析方法。针对不同的土壤堆条件进行了一系列参数研究。结果表明，所开发的分析方法能够预测组合荷载作用下桩体弯曲结构的行为。根据得到的结果，可以通过柱桩直径比与规范化的横向裂化载荷之间的关系来获得最佳的柱墩直径比。通过与现场案例历史的比较，随着规范化桩长的增加，最小钢比率的应用极限深度成比例降低，超过极限深度会收敛到一个恒定值（

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