Abstract
The skid-resisting performance of pavement is a critical factor in traffic safety. Recent studies primarily analyze this behavior by examining the macro or micro texture of the pavement. It is inevitable that skid-resistance declines with time because the texture of pavement deteriorates throughout its service life. The primary objective of this paper is to evaluate the use of different asphalt pavements, varying in resilience, to optimize braking performance on pavement. Based on the systematic dynamics of tire-pavement contact, and analysis of the tire-road coupled friction mechanism and the effect of enlarging the tire-pavement contact area, road skid resistance was investigated by altering the elastic modulus of asphalt pavement. First, this research constructed the kinetic contact model to simulate tire-pavement friction. Next, the following aspects of contact behaviors were studied when braking: tread deformation in the tangential pavement interface, actual tire-pavement contact in the course, and the frictional braking force transmitted from the pavement to the tires. It was observed that with improvements in pavement elasticity, the actual tire-pavement contact area increased, which gives us the ability to effectively strengthen the frictional adhesion of the tire to the pavement. It should not be overlooked that the improvement in skid resistance was caused by an increase in pavement elasticity. This research approach provides a theoretical basis and design reference for the anti-skid research of asphalt pavements.
Highlights
Skid resisting performance is the primary factor affecting traffic safety, during vehicle braking where the anti-skid deficiencies found in pavement will prolong braking time and increase braking distance [1]
In attempt to ameliorate the enhance of asphalt pavement, several authors found that adding crumb rubber into the asphalt mixture by dry process can improve the overall elastic deformation capacity, increasing the tire grip (Xudong Wang 2008 [25]) and strengthening braking performance of the pavement (Chengtao Wang 2002 [18], Jide Zhuang 1986 [19], Liangxi Wang 2008 [20])
To increase brake efficiency and enhance driving safety, the 3D dynamic frictional contact model was created to conduct a reliable analysis of tire-pavement friction
Summary
Skid resisting performance is the primary factor affecting traffic safety, during vehicle braking where the anti-skid deficiencies found in pavement will prolong braking time and increase braking distance [1]. Due to this concern, highway authorities and researchers have been exploring the anti-skid properties of pavement through the frictional contact analyses of three key factors. National Aeronautics and Space Administration (NASA) hydroplaning equation, which is used to calculate the hydroplaning speed of a tire. In the following thirty years, both the NASA equation and the two-dimensional contact model were promoted by Horne et al 1986 [6]
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