【作者】 陈立宏； 张弛； 王玉杰；

【Author】 CHEN Li-hong;ZHANG Chi;WANG Yu-jie;Beijing Jiaotong University;Institute of Water Resources and Hydropower,Xi’an University of Technology;China Institute of Water Resources and Hydropower Research;

【机构】 北京交通大学； 西安理工大学水利水电学院； 中国水利水电科学研究院；

【摘要】 通过对糯扎渡Ⅰ区弱风化花岗岩三轴实验数据的研究,提出了邓肯—张模型参数的二步优化方法。首先以单个围压下的室内三轴实验为依据,对参数a、b进行第一步优化,求得参数k和n。然后以所有围压下是实验数据为依据,对参数k、n进行第二步优化。与规范法比较发现,分步优化方法简单合理,不会低估高围压下的初始弹性模型,从而能得到较为合理的k和n。分步优化的办法降低了优化难度。对于堆石料,用应变前2%的数据进行优化是可行的。本文采用的优化方法为邓肯-张参数的统计提供了一种可行的方法。更多还原

【Abstract】 Through the study of weak Nuozhadu Ⅰ area weathered granite triaxial test data,the proposed two-step optimization Duncan Chang model parameters.First single triaxial confining pressures of experiments based on the parameters a,b be the first step in optimizing the parameters k and obtained n.Confining pressure is then all the experimental data as a basis for the parameters k,n the second step optimization.Comparison with the norms found step optimization method is simple and reasonable,do not underestimate the initial elastic model of high confining pressure,and thus can be more reasonable k and n.Step optimization approach reduces the difficulty of optimization.For a heap of stone,with 2% of the data before the strain optimization is feasible.This article USES the method of optimization for Duncan-chang parameter statistics provides a feasible method.更多还原