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首页> 外文期刊>Journal of Engineering Mechanics >Toward a Fracture Mechanics-Based Design Approach for Unbonded Concrete Overlay Pavements
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Toward a Fracture Mechanics-Based Design Approach for Unbonded Concrete Overlay Pavements

机译：走向基于断裂力学的无粘结混凝土铺面路面设计方法

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摘要

An illustrative fracture mechanics-based design paradigm is proposed for unbonded concrete overlays (UBCOs), an increasingly popular pavement rehabilitation system, with the ultimate goal of establishing a more rational design procedure than those currently available. To illustrate the advantages of the fracture mechanics-based approach to design, specific attention is paid to one type of failure associated with pavement structures, reflection cracking. The design formulas derived from the results of a large number of crack propagation simulations of both the UBCO composite and a reference single-layer new pavement quantify the dependence of the required overlay thickness and load-carrying capacity on all relevant material and geometric parameters. Preliminary comparisons of the results with field observations suggest that the fracture mechanics paradigm offers a promising procedure for improved design of UBCOs
机译：提出了一种基于断裂力学的说明性设计范式，用于无粘结混凝土覆盖层（UBCO），这是一种越来越流行的路面修复系统，其最终目标是建立比目前可用的更为合理的设计程序。为了说明基于断裂力学的设计方法的优势，特别注意了一种与路面结构相关的破坏类型，即反射裂缝。从UBCO复合材料和参考单层新路面的大量裂纹扩展模拟结果得出的设计公式量化了所需覆盖层厚度和承载能力对所有相关材料和几何参数的依赖性。与现场观察结果的初步比较表明，断裂力学范例为改进UBCO设计提供了有希望的程序

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