Study of Asphalt-Concrete Pavement Fatigue Modeling

IF 0.6 4区 工程技术 Q4 ENGINEERING, CIVIL Baltic Journal of Road and Bridge Engineering Pub Date : 2021-03-29 DOI:10.7250/BJRBE.2021-16.513
P. Skels, V. Haritonovs, P. Akishin, A. Freimanis
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引用次数: 1

Abstract

Deterioration of asphalt pavements due to fatigue cracking is one of the most common highway pavement failure types. If the fatigue cracks are allowed to develop and grow, the driving comfort and safety, i.e., serviceability of the pavement, decreases. Pavement fatigue behaviour is not a straightforward mechanism and involves many factors and effects, thus computational methods are developed in order to help understand how the pavement works. This paper explores the accuracy and applicability of a less computational resource demanding procedure that uses transient material mechanical behaviour to model the long-term behaviour of a pavement structure. First, the mechanical and fatigue properties of asphalt were determined at the laboratory. Then a four-layer finite-element model was created using Ansys software. Two different models – with and without infinity elements – and two different fatigue simulation procedures – full and simplified – were considered. Material parameters were obtained by the laboratory tests and material properties degraded over time. Cyclic surface loading was applied to simulate the passing of a truck – 6 million fatigue cycles were simulated.
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沥青混凝土路面疲劳建模研究
沥青路面疲劳开裂劣化是公路路面最常见的失效类型之一。如果允许疲劳裂纹发展和扩大,则驾驶舒适性和安全性,即路面的使用性能会下降。路面疲劳行为不是一个简单的机制,它涉及许多因素和影响,因此计算方法的发展是为了帮助理解路面是如何工作的。本文探讨了一种较少计算资源要求的程序的准确性和适用性,该程序使用暂态材料力学行为来模拟路面结构的长期行为。首先,在实验室测试了沥青的力学性能和疲劳性能。然后利用Ansys软件建立四层有限元模型。考虑了两种不同的模型(含和不含无穷元)和两种不同的疲劳模拟程序(完整和简化)。材料参数是通过实验室测试获得的,材料性能随着时间的推移而退化。采用循环表面荷载模拟货车通过,模拟了600万次疲劳循环。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Baltic Journal of Road and Bridge Engineering
Baltic Journal of Road and Bridge Engineering 工程技术-工程:土木
CiteScore
2.10
自引率
9.10%
发文量
25
审稿时长
>12 weeks
期刊介绍: THE JOURNAL IS DESIGNED FOR PUBLISHING PAPERS CONCERNING THE FOLLOWING AREAS OF RESEARCH: road and bridge research and design, road construction materials and technologies, bridge construction materials and technologies, road and bridge repair, road and bridge maintenance, traffic safety, road and bridge information technologies, environmental issues, road climatology, low-volume roads, normative documentation, quality management and assurance, road infrastructure and its assessment, asset management, road and bridge construction financing, specialist pre-service and in-service training;
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