微型桩动力p-y曲线影响因素参数分析  

Parameter analysis of influence factors of micro-pile dynamic p-y curve

作　　者：庄一舟[1,2] 王静杰 陈云[1,3] 黄福云 ZHUANG Yizhou;WANG Jingjie;CHEN Yun;HUANG Fuyun(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;School of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou 310014,China;Shanghai LANKE Building Damping Technology Co.,Ltd,Shanghai 200000,China)

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]浙江工业大学建筑工程学院,浙江杭州310014 [3]上海蓝科建筑减震科技股份有限公司,上海200000

出　　处：《地震工程与工程振动》2018年第4期29-33,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51778147;51578161);浙江省自然科学基金项目(LY17E080022)~~

摘　　要：本文通过微型桩振动台试验分析了输入波频率、桩顶质量和加速度峰值对砂土中微型桩动力p-y曲线的影响。结果表明:当输入波的频率为低频时,桩侧土压力p与桩身位移y的关系接近线性关系,形成的滞回环面积很小;当输入波频率较大时,桩侧土压力p与桩身位移y成明显非线性关系,形成的滞回环面积较大。随着桩顶质量和加速度峰值的增加,p-y曲线的滞回环呈逐渐张开的趋向,其耗能效应增加。In this paper,the influence of wave frequency,mass on pile head and acceleration peak on the dynamic p-y curve of micro-pile in sand are analyzed by micro-pile shaking table test. The results indicate that when the frequency of input wave is low,the relation between the soil pressure and the displacement is near linear and the area of its hysteretic loop is very small; however,the relation becomes nonlinear and its hysteretic area is larger with the frequency increasing. With the increase of quality on pile head and acceleration peak,the hysteresis loop of p-y curve is gradually open,and its energy dissipation effect is increased.

关 键 词：微型桩 动力p-y曲线 振动台 输入波频率 桩顶质量 加速度峰值 

分 类 号：TU4[建筑科学—土工工程]