摘要
利用有限元方法,探求长期反复堆卸载过程中桩土相互作用的应力应变情况.研究堆卸载过程中被动桩与土体不同时刻的水平位移、变形、沉降、孔隙水压力变化,以及桩身弯矩等对反复荷载下桩土相互作用的规律,通过改变不同的条件来判断影响桩土相互作用的因素.结果表明:土体在反复堆卸载下不同于静力荷载的应力应变表现,在每个堆卸载过程后,都有不可恢复的残余应变,中间还伴随着超孔隙水压力的累积与消散,桩对土体侧移有很好的遮拦效果.
The soil-pile interaction behavior subjected to long-term repeated surcharge load is analyzed by the finite element method. The various indexes-time during the load were presented, such as horizontal displacement, deformation, settlement, pore water pressure and pile bending moments. The effect factors under different conditions were studied. It is concluded that the soil behavior of stress and strain performance under repeated surcharge load is different from that under the static load. There is an unrecoverable residual strain after each process of surcharge load, accompanied by the accumulation of excess pore water pressure and dissipation. The settlements and displacements decrease because of the pile resistance.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2011年第5期569-578,共10页
Journal of Huaqiao University(Natural Science)
基金
国务院侨办科研基金资助项目(09QZR03)
福州大学引进人才科研启动项目(XRC-0637)
关键词
被动桩
反复堆卸载
有限元法
超孔隙水压力
残余应变
passive pile
repeated surcharge load
finite element method
excess pore water pressure
residual strain
作者简介
通信作者：陈福全（1971-），男，教授，主要从事岩土工程数值分析．E-mail：phdchen@fzu.edu.cn
