岩土工程学报Issue(8)：1526-1534,9.DOI:10.11779/CJGE201408020
考虑土抗力方向的p-y曲线法研究
A modifiedp-y curve method considering rotation of soil resistance
摘要
Abstract
The combined load of moments and horizontal forces which are not coplanar at pile top generally cause a complex pile deformation. Under this circumstance, analysis is often performed by using the three-dimensional finite element method, which is not convenient and practical. To simplify the procedure, a modifiedp-y curve method is proposed in 3D space under the assumption that soil resistance springs can be rotated on the horizontal plane. A corresponding mathematical programming (optimization) model is established for solving this method. Based on the principle of the minimum potential energy, the generalized potential energy equation is selected as the objective function in which the soil spring acting work is represented by the integrated p-ycurve functions, and the pile deformation compatibility conditions are selected as constraints, forming a nonlinear programming model. This model assumes five DOFs (degrees of freedom) per node, and thep-∆ effect is considered. The mathematical programming model is validated through three examples. The results show that the assumptions in the proposed method are reasonable, and the model is feasible. Analysis of the soil resistance rotation on the horizontal plane is carried out under bi-directional unevenness bending, and the coordination of displacement and force is presented effectively in the proposed model.关键词
p-y曲线法/水平荷载/p-∆/土抗力方向/数学规划Key words
p-y curve method/horizontal load/p-∆/direction of soil resistance/mathematical programming分类
建筑与水利引用本文复制引用
上官士青,刘红军,朴春德..考虑土抗力方向的p-y曲线法研究[J].岩土工程学报,2014,(8):1526-1534,9.基金项目
国家自然科学基金项目（41072216）；博士点基金项目 （）
