Xie Pengyu, Wang Hao
Department of Civil and Environmental Engineering, School of Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
Materials (Basel). 2024 Aug 29;17(17):4282. doi: 10.3390/ma17174282.
Electrified pavements with inductive charging systems provide an innovative way of providing continuous wireless power transfer to electric vehicles (EVs). Electrified pavements have unique construction methods, resulting in different mechanical and thermodynamic characteristics from traditional pavements. This study aimed to investigate the mechanistic design of electrified pavements to mitigate thermal-induced reflective cracking due to the inclusion of concrete slabs with inductive charging units (CUs) under an asphalt surface layer. Finite element (FE) models were developed to analyze the temperature profiles, pavement responses, and crack potential in electrified pavements. The fatigue model and Paris' law were utilized to evaluate crack initiation and propagation for different pavement designs. Within the allowable range for sufficient wireless charging efficiency, increasing the surface layer thickness had a noticeable benefit on mitigating crack initiation and propagation. The results indicate that increasing the asphalt surface layer thickness by 20 mm can delay crack initiation and propagation, resulting in a two to threefold increase in the number of cycles needed to reach the same crack length. Reflective cracking can also be retarded by the optimized design of the charging unit. Increasing the concrete slab thickness from 100 mm to 180 mm resulted in an approximately 20% increase in the number of cycles to reach the same crack length. Reducing the slab width and length (shortening joint spacing) could also effectively reduce the reflective cracking potential, with the slab length having a more significant influence. These findings highlight the importance of balancing charging efficiency and structural durability in the design of electrified pavements.
带有感应充电系统的电气化路面为向电动汽车（EV）提供持续无线电力传输提供了一种创新方式。电气化路面具有独特的施工方法，导致其机械和热力学特性与传统路面不同。本研究旨在探讨电气化路面的机理设计，以减轻由于在沥青表面层下包含带有感应充电单元（CU）的混凝土板而产生的热致反射裂缝。开发了有限元（FE）模型来分析电气化路面的温度分布、路面响应和裂缝可能性。利用疲劳模型和巴黎定律评估不同路面设计的裂缝萌生和扩展情况。在足够的无线充电效率允许范围内，增加表面层厚度对减轻裂缝萌生和扩展有显著益处。结果表明，将沥青表面层厚度增加20毫米可延迟裂缝萌生和扩展，导致达到相同裂缝长度所需的循环次数增加两到三倍。通过优化充电单元设计也可抑制反射裂缝。将混凝土板厚度从100毫米增加到180毫米，达到相同裂缝长度所需的循环次数增加约20%。减小板的宽度和长度（缩短接缝间距）也可有效降低反射裂缝可能性，其中板的长度影响更为显著。这些发现凸显了在电气化路面设计中平衡充电效率和结构耐久性的重要性。
