A finite element study of rain intensity on skid resistance for permeable asphalt concrete mixes
A finite element study of rain intensity on skid resistance for permeable asphalt concrete mixes
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DOI：
10.1016/j.conbuildmat.2019.05.185
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发表时间：
2019-09-30
影响因子：
7.4
通讯作者：
Erkens, Sandra
中科院分区：
文献类型：
--
作者：
Tang, Tianchi;Anupam, Kumar;Erkens, Sandra
高速公路的安全运营是路面工程师和当局的主要关注点之一。雨天防滑性降低，对安全驾驶构成很大风险。湿滑阻力在不同降雨强度下会发生变化，并受到沥青材料渗透性、路面几何设计和轮胎工作条件等诸多因素的影响。经验研究可以提供有用的了解湿滑阻力的机制及其影响因素，但是，经验关系的适用性受到限制，一旦有一个相关因素的变化。近年来，有限元工具的进步使研究人员能够以更真实的方式模拟轮胎-液体-路面相互作用。然而，据作者所知，目前可用的数值模型要么不包括路面的真实的微观结构，要么忽略了模拟中通过路面空隙的水渗透。因此，本文旨在提供一个数值工具，以评估在不同的降雨强度条件下的抗湿滑性能，考虑路面几何设计，轮胎胎面设计和轮胎的工作条件的影响。路面的表面特性和多孔微观结构包括在模型中的方式，既可以捕获的垂直水流到沥青混凝土和路面上的表面流在模拟中。对上述几个影响发音的因素的影响进行了量化。该模型经验证后，可为路面工程师提供一种简便可靠的工具，更准确地评价雨天路面抗湿滑性能，并可应用于路面管理系统中，以保证公路安全运营。(C)2019爱思唯尔有限公司版权所有。
Safe highway operations are one of the major concerns of pavement engineers and authorities. The reduction of skid resistance during rainy weather poses high risk for safe driving. Wet skid resistance varies under different rainfall intensities and is influenced by many factors such as permeability of asphalt material, pavement geometric design, and tire operating conditions. Empirical studies could offer useful understanding of mechanisms of wet skid resistance and its influencing factors, however, the applicability of the empirical relationships are restricted as soon as there is a change in one of the relevant factors. In recent years, the advancement of the finite element tools has enabled researchers to simulate the tire-fluid-pavement interaction in a more realistic way. However, to the best of the authors' knowledge, the current available numerical models either do not include the real microstructures of the pavement or ignore the water infiltration through the pavement voids in the simulations. Therefore, this paper aims to providing a numerical tool to evaluate the wet skid resistance at various rainfall intensity conditions considering the effects of pavement geometric design, tire tread design and tire operating conditions. The surface characteristics and porous microstructures of the pavement are included in the model in a way that both the vertical water flow into the asphalt concrete and surface flow on the pavement can be captured in the simulation. The effects of several pronouncing influential factors as mentioned above are quantified. Such a model upon validation is expected to provide an easy and reliable tool for pavement engineers to evaluate wet skid resistance under rainy weather more accurately which can be incorporated into pavement management systems for safety highway operation. (C) 2019 Elsevier Ltd. All rights reserved.