水平荷载对复合路面沥青加铺层结构的影响  

Influence of Horizontal Loads on Composite Pavement Overlay

作　　者：刘卓[1] 黄志义[1] 谭真[1] 徐伟[1] 

机构地区：[1]浙江大学交通工程研究所,浙江杭州310058

出　　处：《公路工程》2011年第5期57-60,71,共5页Highway Engineering

摘　　要：根据实测车轮接地压力简化分布形式,采用ABAQUS有限元软件建立了PCC+AC复合路面有限元三维分析模型,考虑最不利荷位和水平力系数进行复合路面沥青加铺层力学响应的数值分析。结果表明:与仅考虑垂直荷载的传统分析相比,不同的力学指标对应的最不利荷位不同。考虑水平荷载后各力学响应指标随着水平力系数的增加而快速增大,影响程度从高至低依次是最大拉应力、最大拉应变、接缝两侧的弯沉差、MISES等效应力、最大剪应力;当水平力系数≥0.2时,加铺层中的最大拉应力和拉应变的位置将由层底转到层表(增加"表"字)面,此时加铺层表面比层底更容易产生张拉裂缝。A three-dimension finite element model of composite pavement is established by using ABAQUS software. A simplified load model is put forward on the base of interfacial pressure＇ actual measurement, the critical load position as well as the overlay＇ s mechanical response are discussed. Through analyzing the results, the following conclusions can be drawn： different mechanical response in- dexes have different critical load positions with the consideration of horizontal loads ; the indexes increase quickly with the increasing horizontal load factor, the rank of the indexes according to the significance affected by theμcan be made; Whenμis bigger than 0.2, the position which has the biggest tension stress and strain is the surface rather than the bottom of the overlay.

关 键 词：PCC+AC复合路面 沥青加铺层 水平荷载 

分 类 号：U416.03[交通运输工程—道路与铁道工程]