土层液化条件下桩土相互作用p-y关系分析  

Analysis on p-y curves of soil-pile interaction in liquefied soils

作　　者：王成雷[1] 王建华[1] 冯士伦[1] 

机构地区：[1]天津大学岩土工程研究所,天津300072

出　　处：《岩土工程学报》2007年第10期1500-1505,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50579050)

摘　　要：依据加权余量法原理,建立了确定桩与液化土层相互作用振动台模型试验动力p–y曲线的方法。分析了具有不同初始相对密度的土层在液化过程中动力p–y曲线的弱化以及桩土相互作用阻尼的变化,对动力p–y曲线和拟静力弱化p–y曲线进行了比较。结果表明:依据静力p–y曲线、按折减系数法确定拟静力弱化p–y曲线时,折减系数的取值不仅取决于土层初始相对密度,还与土层的埋深有关。Based on the weighted residual principle, a method to determine cyclic p -y curves of shaking table model test results of soil-pile interaction was developed. The degradation of cyclic p - y curves and the damping of soil-pile interaction were analyzed for strata with different initial relative densities. The cyclic p - y curves were compared with the pseudo static degradation p - y curves. It was shown that the p - multiplier depended not only on the initial relative density, but also on the depth of strata if the pseudo static degradation p - y curve was determined using the p - multiplier method.

关 键 词：桩土相互作用 振动台模型试验 桩的p–y曲线 桩的承载力 

分 类 号：TU435[建筑科学—岩土工程]