基于Abaqus的旧水泥混凝土路面加铺沥青层结构的力学研究  

Based on Abaqus of Paving Asphalt Layer Structure of Old Cement Concrete Pavement Mechanics

作　　者：程培峰[1] 林宏[1] CHENG Peifeng LIN Hong(Civil Engineering College, Northeast Forestry University, Harbin, Heilongjiang 150040, China)

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《公路工程》2017年第1期9-12,30,共5页Highway Engineering

摘　　要：依据弹性层状体系理论,采用Abaqus程序建立三维有限元模型,分析旧水泥混凝土路面加铺沥青层结构的加铺层厚度、模量、地基模量变化,以及采取典型防治反射裂缝措施时接缝处沥青混凝土加铺层底最不利处的荷载应力状态。结果表明:在车辆荷载作用下,加铺层厚度的增加可以显著降低接缝处沥青加铺层底应力;随加铺层模量的增加,接缝处沥青层底应力逐渐增大;地基模量越小,在相同荷载作用下,加铺层内应力及弯沉越大;各种拟采用的防治反射裂缝措施中,7 cm级配沥青碎石辅以3 cm应力吸收层这种组合措施效果最佳。Based on th mensional finite element model verlay thickness, modulus, foun e d elastic layered theory system, using Abaqus program establish three-di- analysis paving asphalt layer structure of old cement concrete pavement o- ation modulus changes, as well as the measures for prevention and reflec- tion crack typical seam in the bottom of the asphalt concrete paving layer the most unfavorable load stress state. The results show that under vehicle load, the increase of the thickness of the layer asphalt layer bot- tom can significantly reduce the joint stress; with the increase of the paving layer modulus, seams of as- phalt layer bottom stress increases gradually;uder the same load,the smaller the foundation modulus,the greater the stress and deflection within the paving layer;the most effective measure to prevent reflection crack among several typical measures is 7 cm thick graded asphalt macadam combined with 3 cm thick stress absorbing layer.

关 键 词：沥青混凝土加铺层 荷载应力 弯沉 有限元分析 

分 类 号：U418.6[交通运输工程—道路与铁道工程]