土层液化过程中桩土相互作用的动力p-y曲线研究  

Study on Dynamic p-y Curves of Soil-pile Interaction during Liquefaction

作　　者：王成雷[1] 王建华[1] 

机构地区：[1]天津大学岩土工程研究所,天津300072

出　　处：《中国港湾建设》2007年第2期9-12,26,共5页China Harbour 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,推导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。A method to determine cyclic p-y curves of pile-soil interaction by shaking table model tests is developed using the weighted residual principle. The degradation of cyclic p-y curves and the soil-pile interaction damping were analyzed for strata with different initial relative density. The cyclic p-y curves were compared with the pseudo static degraded p-y curves. The results show that the p-multiplier depends not only on the initial relative density but also the depth of strata if the pseudo static degradation p-y curve is 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]