荷载作用下桩间相互作用系数计算分析

摘要

传统弹性解法对桩间相互作用系数的求解没有考虑主动桩加载因素对被动桩的影响.本文基于剪切位移法的基本荷载传递方程,引入理想弹塑性的桩土界面关系,将单桩加载过程分成弹性、弹塑性、塑性3个阶段分别考虑主动桩对被动桩的影响,特别考虑了弹塑性阶段主动桩弹性区和塑性区对被动桩的不同作用,提出了一种简化的考虑加载影响的桩间相互作用系数计算方法.最后通过与模型试验比较分析,验证了计算方法的正确性.%Traditional elastic solution of interaction coefficients between piles does not consider active piles load effects on passive piles. Based on the basic load transfer equation of the shear displacement method,the ideal elastic-plastic pile-soil interface relations was introduced. T he single pile loading process was divided into elastic,elastic-plastic and plastic stages. T he influences of elastic and the plastic zones of the active piles on the passive piles were considered respectively. A simplified calculating method for the interaction coefficients between piles was proposed. Finally,the correctness of the calculation method was verified by comparing with the model test.