Simplified non-linear approaches for response of a single pile and pile groups considering progressive deformation of pile-soil system
Simplified non-linear approaches for response of a single pile and pile groups considering progressive deformation of pile-soil system
复制标题
考虑桩土系统渐进变形的单桩和群桩响应的简化非线性方法
DOI：
10.1016/j.sandf.2016.04.013
复制
发表时间：
2016
影响因子：
3.7
通讯作者：
Wang Kang
中科院分区：
文献类型：
--
作者：
Zhang Qian-qing;Liu Shan-wei;Zhang Shi-min;Zhang Jian;Wang Kang
本文提出了多层土中单桩和群桩荷载-位移响应非线性分析的一种简化方法。采用双曲模型描述沿桩-土界面发展的桩-土相对位移与摩阻力之间的关系。假定桩身位移由桩身周围扰动土体处发生的桩土相对位移和土体中发生的弹性竖向位移组成。然后给出了轴位移与表面摩擦力之间的关系。此外，还采用双曲模型来描述桩端阻力与桩端位移之间的关系。考虑桩与桩之间的相互作用，提出了群桩中单个桩的双曲模型。对于单桩和群桩的响应分析，考虑桩-土系统的渐进变形，利用所提出的双曲模型开发了高效的迭代计算程序。荷载-沉降响应的比较表明，所提出的方法与现场观测行为和其他方法的计算结果基本吻合。
This work presents a simplified approach for the nonlinear analysis of the load–displacement response of a single pile and pile groups embedded in multilayered soils. A hyperbolic model is used to capture the relationship between the skin friction and the pile–soil relative displacement developing along the pile–soil interface. The shaft displacement is assumed to be composed of the pile–soil relative displacement developing at the disturbed soil around the pile shaft and the elastic vertical soil displacement developing in the soil mass. The relationship between the shaft displacement and the skin friction is then presented. Moreover, a hyperbolic model is also used to capture the relationship between end resistance and pile end displacement. Considering the interactive effect among piles, hyperbolic models of an individual pile in pile groups are proposed. As to the analysis of the response of a single pile and pile groups, considering the progressive deformation of the pile–soil system, a highly effective iterative computer program is developed using the proposed hyperbolic models. Comparisons of the load–settlement responses demonstrate that the proposed method is generally in good agreement with the field-observed behavior and the calculated results derived from other approaches.