优化理论的沥青混合料蠕变本构模型经验性公式  

Experienced equation of asphalt mixture creep constitutive model based on optimization theory

作　　者：周志刚[1] 刘飞[1] 冯林[1] 

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

出　　处：《长沙理工大学学报（自然科学版）》2009年第1期6-9,共4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)

摘　　要：对沥青混合料40℃时200 kPa荷载下和40℃时50 kPa荷载下的静态蠕变试验进行分析,发现传统的机械模型均不能同时描述"固结效应"和"流动破坏"两种情况,而现有的经验型模型精度又不高.因此,基于Levenberg-Marqurdt理论和全局优化理,提出了一种经验型优化模型,采用1Stop软件进行求解,验证了该模型能克服传统机械模型描述延展性不好以及现有经验型模型精度不高的缺点.The analysis of the static load creep tests to asphalt mixture under 40 ℃, 200 kPa and 40 ℃, 50 kPa, indicated that the traditional machine model of asphalt mixture can not decribe the ＂consolidation effect＂and ＂flow damage＇at the same time. The accuracy of the existing experienced model of asphalt mixture is not high. Therefore, based on Levenberg-Marqurdt and global optimization theory, one kind of optimized experienced asphalt mixture creep constitutive model is proposed and solved by 1Stop software. The model is verified to overcome the shortcoming that the traditional machine model description extensibility is not good and the commonly used experinced model precision is not high.

关 键 词：沥青混合料 静态蠕变 优化理论 优化模型 

分 类 号：U412.221[交通运输工程—道路与铁道工程]