基于Abaqus的旧水泥混凝土路面加铺沥青层结构的力学研究
发布时间：2019-02-09 19:36
【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。
[Abstract]:According to the theory of elastic layered system, a three-dimensional finite element model is established by Abaqus program to analyze the thickness, modulus and modulus of asphalt overlay structure of old cement concrete pavement. And the load stress state at the bottom of asphalt concrete overlay is the most disadvantageous when typical measures are taken to prevent and cure the reflection crack. The results show that the stress at the bottom of the asphalt overlay increases with the increase of the modulus of the overlay, and the stress of the overlay increases with the increase of the modulus of the overlay. The smaller the modulus of the foundation, the greater the stress and deflection of the overlay under the same load, and the better the combined measures of 7 cm gradation asphalt macadam and 3 cm stress absorption layer are adopted to prevent the reflection crack.
【作者单位】： 东北林业大学土木工程学院;
【分类号】：U416.216
[Abstract]:According to the theory of elastic layered system, a three-dimensional finite element model is established by Abaqus program to analyze the thickness, modulus and modulus of asphalt overlay structure of old cement concrete pavement. And the load stress state at the bottom of asphalt concrete overlay is the most disadvantageous when typical measures are taken to prevent and cure the reflection crack. The results show that the stress at the bottom of the asphalt overlay increases with the increase of the modulus of the overlay, and the stress of the overlay increases with the increase of the modulus of the overlay. The smaller the modulus of the foundation, the greater the stress and deflection of the overlay under the same load, and the better the combined measures of 7 cm gradation asphalt macadam and 3 cm stress absorption layer are adopted to prevent the reflection crack.
【作者单位】： 东北林业大学土木工程学院;
【分类号】：U416.216
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