基于承载板试验的粒料层非线性弹性参数反算方法  

Back-calculation method of nonlinear elastical parameters of granular layer based on the bearing-plate test

作　　者：周志刚[1] 张军[1] 敖洪涛[1] 

机构地区：[1]长沙理工大学道路结构与材料交通行业重点实验室,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2013年第3期6-12,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(50778027);广西交通科技计划项目(桂交综合发[2010]109号)

摘　　要：提出了一种基于现场承载板试验的粒料层非线性弹性参数的反算方法,即根据路面粒料层表面上承载板试验时逐级加载测试的弯沉,应用非线弹性有限元方法和改进的非线性最小二乘法反算粒料层的非线性弹性模型参数,并针对反算过程中的缺陷提出了修正方法.在此基础上研制了粒料层非线性弹性参数反算软件,并将粒料层非线性计算的理论弯沉与现场承载板试验的实测弯沉进行对比,论证了所提反算方法的合理可行性.A back calculation method of nonlinear elastical parameters of granular layer is proposed based on the bearing-plate test. Based on the deflection obtained with progressive- ly loading during bearing plate test, we use nonlinear finite element method and the im- proved nonlinear least squares method to back calculate nonlinear elastical model parameters of granular layer,and propose a correction method for the defect of back-calculation. On this basis we develop a software to back calculate the nonlinear elastical parameters of granular layer. At the same time,comparing deflection of the granular layer calculaed by nonlinear theory with the measured deflection on the bearing-plate test, we demonstrate reasonable feasibility of the back-calculation method.

关 键 词：粒料层 回弹模量 非线性弹性模型 承载板试验 反算 非线性最小二乘法 非线性有限元 

分 类 号：U416.217[交通运输工程—道路与铁道工程]