铁道标准设计Issue(10)：62-65,66,5.DOI:10.13238/j.issn.1004-2954.2014.10.015
铁路桥梁桩基础抗震性能拟静力试验研究
Study on the Static Test of Anti-earthquake Performance of Rai1way Bridge Pi1e Foundation
摘要
Abstract
In order to study the change process of internal forces and distribution rule of stress of pile considering nonlinear behaviors of pile shaft and subsoil under lateral loads, the pseudo-static test on scale model are carried out to study failure mechanism, bearing capacity and stress distribution of pile. A nonlinear static calculation model of pile group foundations is put forward to conduct Pushover analysis on pile-pile cap-pier structure, in which the elastoplasticity of pier shafts is simulated by M plastic hinge, pile shafts in variable axial loads issimulated by distributed PMM plastic hinge and nonlinearity of subsoil is simulated by the method given in Japan Railway Code. The results show that:(1) Under lateral loads, piles are not loaded uniformly,and the stress of outer row of pile is greater than the inside row of pile. (2)The maximum stress point of tall platform pileis located at the depth of about 2 ~ 4 radius.关键词
铁路桥梁/群桩基础/非线性/模型试验/拟静力试验Key words
nonlinearity/group pile foundation/model test/pseudo-static test/railway bridge分类
交通工程引用本文复制引用
李天宝,陈兴冲,丁明波..铁路桥梁桩基础抗震性能拟静力试验研究[J].铁道标准设计,2014,(10):62-65,66,5.基金项目
国家自然科学基金(51068017) （51068017）
