摘要
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 heterogeneity on asphalt mixture split test, a realistic failure process analysis program was used to conduct the numerical simulation of split test. The Weibull distribution of asphalt concrete strength coefficient was assumed in the digital test to study the stress state and cracking process. Marshall split test was conducted on AC-10 specimen, and its split failure process was simulated. Analysis result shows that the cracking state tends to dispersion with the decrease of homogeneous degree, but the cracking state of specimen with high homogeneous degree is more regular. Affected by the stochastic distribution of heterogeneous element, the stress distribution presents multiple peaks in specimen split process. The split process of Marshall specimen in digital test is similar with that in physical test. 2 tabs, 11 figs, 10 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2009年第2期12-16,共5页
Journal of Traffic and Transportation Engineering
基金
国家西部交通建设科技项目(200431800054)
四川省交通科技项目(SC20060038-C)
