期刊论文

Elastic-plastic analysis of a torsional single pile in non-homogeneous subsoil based on energy principle

中文

水文地质工程地质

Hydrogeology and Engineering Geology

1000-3665

2016

37

2

54-61

10.16030/j.cnki.issn.1000-3665.2016.02.08

国家自然科学基金资助项目(51378197)；

本校为其他机构

为探讨非均质地基中单桩受扭的非线性特性,假定桩侧地表处地基土剪切模量为非零值（已有方法多假定为零）且随深度呈幂函数分布,引入虚土桩法建立出桩土体系的总能量方程后,基于最小势能原理由变分法分别导得桩身及土体的受扭控制方程,进而采用有限差分法获得桩身扭转角的差分方程式。然后,将桩周土体视为理想弹塑性材料,给出了塑性状态下的单桩受扭分析方法,并基于MATLAB编制了计算程序,再将计算结果与已有方法及实验结果进行了对比验证。最后,通过参数分析获得了桩体参数G_p和r_0以及土体参数α_g和n的取值对桩身扭转响应的影响规律：随桩体剪切模量G_p的增大,桩顶扭转角减小;桩径r_0增大一倍...

To discuss the nonlinear torsional response of a single pile in non-homogeneous subsoil,the modulus profile was taken as a power function varying with depth with a nonzero value on the land surface（ usually treated as zero）. The virtual pile was introduced to establish the total energy function of the pile-soil system,from which the differential government equations for the pile shaft and subsoil were derived by the principle of the minimum potential energy and variational methods,respectively. The finite difference method was adopted to obta...