论文部分内容阅读
主要分析SMA沥青混凝土的断裂与疲劳性能。采用小梁三点弯曲试验分析不同温度(-10~60℃)对SMA沥青混凝土弯曲强度、最大弯曲应变、弯曲劲度模量和断裂应变能密度的影响,同时采用小梁四点弯曲试验研究其疲劳性能。试验结果表明SMA沥青混凝土各项力学性能呈明显的温度依赖性,其疲劳寿命可采用典型的沥青混合料疲劳模型进行预估,模型预估结果的误差与试验数据离散性在同一水平。
The main analysis of SMA asphalt concrete fracture and fatigue properties. The bending strength, maximum bending strain, flexural stiffness modulus and fracture strain energy density of SMA asphalt concrete at different temperatures (-10 ~ 60 ℃) were analyzed by the three-point bending test of trabecular. At the same time, the four-point bending test Its fatigue performance. The test results show that the mechanical properties of SMA asphalt concrete are obviously temperature dependent. The fatigue life of SMA asphalt concrete can be estimated by using the typical fatigue model of asphalt mixture. The error of prediction results is in the same level as the test data.