论文部分内容阅读
为了分析非均质特性对沥青混合料劈裂试验的影响,应用真实破裂过程分析系统,全过程模拟了考虑均质度影响的沥青混合料劈裂试验,并假定沥青混合料强度参数符合Weibull分布,分析了劈裂过程中应力分布状态和裂纹分布状态,同时对AC-10沥青混凝土马歇尔试件进行了劈裂试验,模拟了劈裂破坏过程。结果表明:裂纹状态随均质度的减小趋向离散,高均质度的试件劈裂裂纹状态更具有规则;受非均质基元体随机分布的影响,试件劈裂过程中的应力分布呈现出多峰值现象;马歇尔试件的数值试验和物理试验具有相同的劈裂过程。
In order to analyze the influence of heterogeneous characteristics on asphalt mixture splitting test, the true fracture process analysis system was used to simulate the splitting test of asphalt mixture considering the influence of homogeneity, and the strength parameters of asphalt mixture were fitted to Weibull distribution The stress distribution and the distribution of cracks in the splitting process were analyzed. At the same time, the splitting test of AC-10 asphalt concrete Marshall specimen was carried out to simulate the splitting failure process. The results show that the crack state tends to be discrete with the decrease of the homogenization degree, and the crack state of the specimen with high homogeneity is more regular. Due to the random distribution of heterogeneous elementary elements, the stress during the splitting of the specimen The distribution shows a multi-peak phenomenon; the numerical and physical tests of the Marshall specimen have the same splitting process.