Field measurement of strain response for typical asphalt pavement

来源期刊:中南大学学报(英文版)2021年第2期

论文作者:潘勤学 郑策策 吕松涛 钱国平 张军辉 文丕华 MILKOS Borges Cabrera 周怀德

文章页码:618 - 632

Key words:asphalt pavement; strain; duration curve; load position; vehicle speed; fiber Bragg grating optical sensors

Abstract: In order to reveal the changing law of the mechanical response of asphalt pavements under the action of vehicle load and provide references for the design of durable pavements, three typical asphalt pavement structures with flexible base (S1), combined base (S2), and semi-rigid base (S3) were selected to perform field strain tests under static and dynamic load using the fiber Bragg grating optical sensing technology. The changing characteristics of the strain field along the horizontal and depth directions of pavements were analyzed. The results indicate that the most unfavorable asphalt pavement layers were the upper-middle surface layer and the lower base layer. In addition, the most unfavorable loading positions on the surface layer and the base layer were the center of wheel load and the gap center between two wheels, respectively. The most unfavorable layer of the surface layers gradually moved from the lower layer to the upper layer with the increase of base layer modulus. The power function relationships between structural layer strain and vehicle speed were revealed. The semi-rigid base asphalt pavement was the most durable pavement type, since its strain value was lower compared to those of the other structures.

Cite this article as: PAN Qin-xue, ZHENG Ce-ce, LU Song-tao, QIAN Guo-ping, ZHANG Jun-hui, WEN Pi-hua, MILKOS Borges Cabrera, ZHOU Huai-de. Field measurement of strain response for typical asphalt pavement [J]. Journal of Central South University, 2021, 28(2): 618-632. DOI: https://doi.org/10.1007/s11771-021-4626-9.

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