摘要
高模量沥青混凝土具有模量高、抗车辙性能好等优点,能够显著提高沥青路面的抗永久变形能力并适当减薄沥青结构层厚度。分析了天津地区普通公路沥青混凝土路面典型结构的路面受力特点,同时利用KENLAYER和ANSYS有限元软件对路面结构的剪应力分布特点、疲劳寿命和车辙进行试验分析,结果表明,将高模量沥青混凝土材料设置在上下面层结构位置,能有效降低结构内部的剪应力,改善受力情况,提高其疲劳强度和抗车辙能力,大大延长公路的使用寿命。
High modulus asphalt concrete has the advantages of high modulus and good rutting resistance. It can significantly improve the permanent deformation resistance of asphalt pavement and reduce the thickness of asphalt structure layer. In this paper, the pavement stress characteristics of typical asphalt concrete pavement structures of ordinary highways in Tianjin are analyzed. At the same time, KENLAYER and ANSYS finite element software are used to test and analyze the distribution characteristics of shear stress, fatigue life and rutting of pavement structure. The results show that setting high modulus asphalt concrete material in the upper and lower layers can effectively reduce the shear stress in the structure, improve the stress condition, improve its fatigue strength and rutting resistance, and greatly prolong the service life of the highway.
作者
邳慧然
李正中
武岩峰
PI Hui-ran;LI Zheng-zhong;WU Yan-feng(Tianjin Traffic Science Research Institute, Tianjin 300074, China;Tianjin Expressway Group Co., Ltd., Tianjin 300384, China)
出处
《北方交通》
2019年第7期52-55,59,共5页
Northern Communications
