ABSTRACT

Layered elastic theory is a familiar and commonly accepted framework for modelling and analysis of pavement systems. In actuality however, the suitability of the theory is challenged whenever the system includes a fragmented layer – which violates the inherent layer continuity assumption. This paper addressed the modelling challenge in these situations by introducing a fragmented layer into the accepted framework. A new formulation was proposed, based on the hypothesis that the thickness of the fragmented layer can be incorporated as part of its governing parameters. Doing so allowed for treating the fragmented layer as a new kind of interface. Subsequently, the work focused on formulation development and clear step-by-step presentation of new derived expressions applicable to the case of a stratified half-space containing a fragmented layer. Several synthetic cases were generated and interrogated to verify the correctness of underlying equations and to demonstrate capabilities. Based on this interrogation the proposed formulation is deemed rich of prospective utility, especially for modelling pavements surfaced with concrete paving blocks, pavement systems that contain cracked-and-seated (or rubblised) Portland cement concrete, and aged or rehabilitated pavement systems that contain fatigued (multi-fractured) asphalt concrete layers.

摘要

分层弹性理论是一种熟悉且普遍接受的路面系统建模和分析框架。然而，实际上，只要系统包含碎片层，理论的适用性就会受到挑战——这违反了固有的层连续性假设。本文通过在已接受的框架中引入碎片层来解决这些情况下的建模挑战。基于碎片层的厚度可以作为其控制参数的一部分纳入的假设，提出了一种新的公式。这样做可以将碎片层视为一种新的接口。随后，工作重点是公式开发和清晰的分步表示适用于包含碎片层的分层半空间情况的新派生表达式。生成并询问了几个综合案例，以验证基础方程的正确性并展示能力。基于这种询问，提议的公式被认为具有丰富的预期效用，特别是用于模拟铺有混凝土铺路块的路面、包含开裂和就位（或碎石）波特兰水泥混凝土的路面系统，以及老化或修复的路面系统，其中包含疲劳（多裂缝）沥青混凝土层。