粘弹塑性地基中的竖直受力桩分析

Vertical Loaded Pile on Viscoelastoplastic Soil Analysis

从地基土的流变特性出发分析桩土体系的共同作用 .地基土体采用粘弹塑性流变本构模型 ,为适应地基实际的层状结构 ,采用有限层法分析 ;桩采用弹性杆有限元分析 .根据位移协调原则 ,得到体系平衡方程 ,应用“时步 -初应变法”获得了不同时刻的桩土位移解 .通过分析得到了地基参数对竖直受力桩达到沉降相对稳定所需时间 T及桩顶始末位移变化比

This dissertation is devoted to the study of pile soil interaction.Soil is modeled as visco elasto plastic material with layered feature and analyzed by finite layer method in practice.Pile is modeled as elastic bar.Using the equilibrium theory of pile soil system for harmony condition of displacement,the calculation result of pile soil system can be got at any time by use of time step initial strain method.Computer program is established in order to analyze time dependent properties of soil system.Some conclusions which benefit the design of pile foundation are obtained.