基于数字图像测量的Duncan-Chang模型参数研究  

Study on Duncan-Chang model parameters based on digital image processing method

作　　者：孙益振[1] 邵龙潭[1] 李根华 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室,大连116024 [2]中国联合工程公司,杭州310022

出　　处：《岩土力学》2006年第8期1335-1338,1343,共5页Rock and Soil Mechanics

基　　金：教育部高等学校骨干教师资助计划资助(No.2000-65);留学回国人员科研启动基金资助项目(No.2001-345)

摘　　要：利用三轴土样变形数字图像测量系统进行研究，发现不同测量方式得出的Duncan—Chang模型参数的差别很大。分析得出，数字图像局部变形非接触式测量与传统整体测量方式是导致模型参数存在差异的主要原冈。数值算例说明了模型参数差别对位移计算结果的影响程度，变形数字图像测量得到的模型参数K和Kb比传统测量的结果高2～3倍，相应的位移计算结果是传统测量方法模型参数计算得到结果的一半。Digital image processing technique is used to study the Duncan-Chang model parameters based on the triaxial tests. The research has recorded valuable data using the newly developed measurement method. There are great differences between the Duncan-Chang model parameters conducted from the digital image processing technique and traditional measurement methods. The reasons that cause by the different measurement technique and measurement area are analyzed. The influence degree of parameters variety on displacements results is discussed through numerical analysis. As a result of our experiments, we conclud that the parameters K and Kb from digital image processing technique are two to three times higher than the values from traditional method. Furthermore, the displacements are about half of the value calculated from the traditional method.

关 键 词：Duncan—Chang模型 三轴试验 数字图像测量 

分 类 号：TU411.4[建筑科学—岩土工程]