扩底桩抗拔承载力的有限元分析  

Finite Element Analysis on Pullout Resistance Capacity of Piles with Enlarged Base

作　　者：蒯行成[1] 王维金[1] 刘伟纲[1] 董国庆[1] 

机构地区：[1]湖南大学力学与航空航天学院,湖南长沙410082

出　　处：《公路工程》2010年第1期33-36,50,共5页Highway Engineering

摘　　要：以某典型扩底桩为具体分析对象建立有限元模型,模型中土体采用弹塑性模型,桩土界面设置接触单元,对扩底桩上拔荷载传递特性以及抗拔承载力进行分析,讨论了桩侧摩阻力分布、土体塑性区的发展以及桩长和土的性质对抗拔承载力的影响等问题。The finite element model for a typical pile with enlarged base is established, in which the elastic-plastic material model is used for soil and the contact elements are defined on the interface be- tween the pile and the soil. The analysis on the characteristic of uplift load transmitting and the pullout resistance capacity of the pile with enlarged base is performed. The distribution of the friction on the side of pile, the development of the plastic region of soil and the effect of the pile length and the soil properties on the pullout resistance capacity are discussed.

关 键 词：扩底桩 抗拔承载力 有限元分析 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]