冲击荷载对透水沥青混凝土劈裂强度的影响  

Influence of impact loading on splitting strength of permeable asphalt concrete

作　　者：吴金荣[1] 马芹永[1] 

机构地区：[1]安徽理工大学矿山地下工程教育部工程研究中心,淮南232001

出　　处：《应用力学学报》2015年第5期871-875,903,共5页Chinese Journal of Applied Mechanics

基　　金：安徽省高校省级自然科学研究重点项目(KJ2013A082)

摘　　要：为了提高透水沥青路面的强度,首次对透水沥青混凝土进行了SHPB冲击劈裂试验,分析了透水沥青混凝土劈裂强度的变化规律,并与静态劈裂试验进行了对比。研究结果表明：透水沥青混凝土的冲击劈裂强度随着冲击气压的增大而提高,并且试件出现了裂缝、块裂、碎裂三种破坏形态;冲击气压越大,冲击劈裂韧性指标越大,透水沥青混凝土抵抗冲击破坏的能力越强;劈裂强度动态增长因子越大,冲击劈裂强度相对于静态劈裂强度提高的幅度就越大;冲击劈裂强度约是静态劈裂强度的37.5~47.5倍。In order to improve the strength of permeable asphalt pavement, static splitting test and impact splitting test are adopted to research on change laws of splitting strength of permeable asphalt concrete. The test results show that impact splitting strength of permeable asphalt concrete increases with strain rate increasing, which is a significant strain rate effect. Impact splitting stress-strain curve of permeable asphalt concrete includes elastic and plastic deformation stage and failure stage, plastic deformation is obvious and elastic deformation is small. Impact splitting toughness increases with strain rate increasing, which shows that impact resistance of permeable asphalt concrete enhances. Impact splitting strength greatly improves relative to static splitting strength with dynamic increase factor of splitting strength increasing.

关 键 词：透水沥青混凝土 冲击荷载 冲击气压 劈裂强度 冲击劈裂韧性指标 

分 类 号：O347.3[理学—固体力学]