层间状态对直接式PFCC-PCC路面应力分布影响分析  

Research on the Influence of Interlayer State on Stress Distribution of Direct PFCC-PCC Pavement

作　　者：周隆[1] 金哲 

机构地区：[1]同济大学道路与交通工程教育部重点试验室,上海201804 [2]辽宁奥路通科技有限公司,辽宁沈阳110166

出　　处：《公路工程》2017年第6期88-93,115,共7页Highway Engineering

基　　金：内蒙古交通厅科技项目(NJ-2015-18)

摘　　要：针对在原普通水泥混凝土(PCC)路面上实施聚丙烯纤维水泥混凝土(PFCC)加铺层的路面结构的层间状态对结构内荷载应力及温度应力的分布状况影响进行分析。首先,根据路面结构及温度场自然边界条件建立路面结构有限元模型;然后,通过改变不同结构层间的摩擦系数确定影响荷载应力分布的结构层;最后,通过采用不同的对流交换系数实现对层间分离温度应力分布状态的分析。结果表明:综合考虑结构层间分离作用对荷载应力和温度应力分布产生的影响,采取直接式加铺PFCC面层时应采取增大层间摩阻作用的措施,以延长路面结构的使用寿命。Based on the interlayer state of Polypropylene fiber cement concrete（ PFCC） pavement structure overlaied on Portland cement concrete（ PCC） pavement,the influence of the load stress and temperature stress distribution in the pavement structure is analyzed. First of all,according to the pavement structure and the temperature field of the natural boundary conditions to establish the finite element model of pavement structure; then,by changing the friction coefficient between different layers to determine the influence of load stress structure layer stress distribution; finally,analysis the interlayer separation temperature stress distribution of the convection by using different exchange coefficient. The results show that the effects of structural layer inter separation on load stress and temperature stress should be comprehensively considered,therefore when the direct overlayer of the PFCC surface is adopted that the measures of increasing interlayer friction should be taken in order to prolong the service life of the pavement structure.

关 键 词：摩阻作用 荷载应力 层间分离 温度应力 

分 类 号：U418.1[交通运输工程—道路与铁道工程]