ABSTRACT

This manuscript describes the development of a new pavement analysis programme called CrossPave based on the Multi-Layered Elastic Theory (MLET) framework, but capable of accommodating stress-dependent and cross-anisotropic behaviour of unbound pavement layers. Generally, Finite Element (FE) based programmes such as ILLI-PAVE, MICH-PAVE, SENOL, GT-PAVE etc. or general-purpose FE programs with special user-defined material sub-routines have been used to model the stress-dependent nature of unbound materials. However, these FE programme are time consuming and need certain expertise, making them unfavourable for implementation into practice. Few MLET-based programmes such as KENLAYER and Everstress are capable of considering the stress-dependent nature of unbound materials, but fail to accommodate some of the recently developed material models. The newly developed pavement analysis programme, CrossPave, addresses these issues, and incorporates five different non-linear stress-dependent resilient modulus models for unbound materials. Details of the developmental effort are presented in this manuscript, along with results from validation efforts highlighting close agreement between KENLAYER, ILLI-PAVE and GT-PAVE. Critical pavement response parameters for two full-scale pavement sections were calculated using CrossPave, and have been compared against field-measured values. The CrossPave programme has been presented as an enhanced, ready-to-implement programme compared to other MLET-based alternatives.

摘要

这份手稿描述了一种名为 CrossPave 的新路面分析程序的开发，该程序基于多层弹性理论 (MLET) 框架，但能够适应未绑定路面层的应力相关和交叉各向异性行为。通常，基于有限元 (FE) 的程序（例如 ILLI-PAVE、MICH-PAVE、SENOL、GT-PAVE 等）或具有特殊用户定义材料子程序的通用有限元程序已用于对应力相关模型进行建模未结合材料的性质。然而，这些 FE 程序耗时且需要一定的专业知识，不利于实施到实践中。很少有基于 MLET 的程序（例如 KENLAYER 和 Everstress）能够考虑未结合材料的应力依赖性，但无法适应一些最近开发的材料模型。新开发的路面分析程序 CrossPave 解决了这些问题，并结合了五种不同的非线性应力相关弹性模量模型，用于未结合的材料。本手稿中介绍了开发工作的详细信息，以及验证工作的结果，强调了 KENLAYER、ILLI-PAVE 和 GT-PAVE 之间的密切一致性。使用 CrossPave 计算了两个全尺寸路面部分的关键路面响应参数，并与现场测量值进行了比较。与其他基于 MLET 的替代方案相比，CrossPave 程序已作为增强的、可立即实施的程序呈现。本手稿中介绍了开发工作的详细信息，以及验证工作的结果，强调了 KENLAYER、ILLI-PAVE 和 GT-PAVE 之间的密切一致性。使用 CrossPave 计算了两个全尺寸路面部分的关键路面响应参数，并与现场测量值进行了比较。与其他基于 MLET 的替代方案相比，CrossPave 程序已作为增强的、可立即实施的程序呈现。本手稿中介绍了开发工作的详细信息，以及验证工作的结果，强调了 KENLAYER、ILLI-PAVE 和 GT-PAVE 之间的密切一致性。使用 CrossPave 计算了两个全尺寸路面部分的关键路面响应参数，并与现场测量值进行了比较。与其他基于 MLET 的替代方案相比，CrossPave 程序已作为增强的、可立即实施的程序呈现。