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引用次数: 0
摘要
本研究建立了一个有限元模型,以计算沥青混凝土层之间(AC-AC 接口)和沥青混凝土层与基层之间(AC-基层接口)具有不同粘结条件的沥青路面的响应。讨论了不同界面粘结条件对沥青路面破坏模式的影响。结果表明,粘结不良会增加沥青混凝土层底部的纵向拉应变和基层顶部的纵向压应变,两种界面对路面的负面影响会相互增强。据观察,粘结强度不足会降低路面的预测寿命,更重要的是,AC-AC 接口或两个接口同时脱粘将改变路面的破坏模式。此外,应该注意的是,AC-AC 接口的完全未粘结状态会影响 AC 层裂缝萌发的临界位置。
Influence of bonding condition of different interfaces on the mechanical responses and failure mode of asphalt pavement
In this study, a finite element model was established to compute the responses of asphalt pavement with various bonding conditions between the asphalt concrete layers (AC-AC interface) and between the asphalt concrete layer and base (AC-Base interface). The influence of bonding conditions of different interfaces on failure mode of asphalt pavement was discussed. The results indicated that poor bonding condition would increase longitudinal tensile strain at the bottom of the AC layers and vertical compressive strain at the top of subgrade, and the negative effects of two interfaces on pavement would enhance each other. It was observed that insufficient bonding strength would reduce the predicted life of pavement and, more importantly, debonding of AC-AC interface or two interfaces simultaneously would change pavement failure mode. Additionally, it should be noted that the fully-unbonded condition of AC-AC interface would affect the critical location for crack initiation in AC layers.
期刊介绍:
The Canadian Journal of Civil Engineering is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structural engineering, construction engineering, engineering mechanics, engineering materials, and history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academia. New developments in engineering design and construction are also featured.