沥青混合料劈裂回弹模量的研究  

Research on the Resilient Moduli of the Asphalt Mixture under Splitting Loading

作　　者：罗作芬[1,2] 郑传超[1] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《河北工业大学学报》2010年第3期107-111,共5页Journal of Hebei University of Technology

摘　　要：利用有限元程序对沥青混合料劈裂试验进行数值模拟,拟合并推导出弹性模量的计算公式.根据劈裂试验测得的回弹变形数据,详细阐述了一个具体沥青混合料试件劈裂回弹模量的计算过程,并分析了3种温度条件下沥青混合料的劈裂回弹模量,最后将3种受力方式下所测得的弹性模量及其对路面结构受力的影响进行了比较分析.研究成果对沥青混合料弹性模量的确定及沥青路面结构设计规范的参数选择具有重要的意义.The finite element software was applied to simulate the splitting test of asphalt mixture, and the computation formula of elastic modulus was fitted out. On the basis of the measured resilient deformation during the splitting test, the computation process of elastic modulus of the asphalt mixture under splitting loading was illustrated in detail. The elastic moduli of the asphalt mixture under splitting loading at three temperatures were analyzed. Finally the resilient moduli of the asphalt mixture measured under three kinds of loading were compared with each other and their influence on stresses in pavement were analyzed. The results are of significance in the determination of elastic modulus of the asphalt mixture and parameter selection in specifications for asphalt pavement design.

关 键 词：沥青混合料 弹性模量 劈裂试验 回弹变形 数值模拟 

分 类 号：U416[交通运输工程—道路与铁道工程]