Issue 45

C. Huang et alii, Frattura ed Integrità Strutturale, 45 (2018) 108-120; DOI: 10.3221/IGF-ESIS.45.09 108 A new viscoelastic mechanics model for the creep behaviour of fiber reinforced asphalt concrete Chunshui Huang College of Civil Engineering, Xuchang University, Xuchang 461000, China; School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China chunshuihuang@163.com Fangtao Wang, Tao Gao Henan Province Highway Engineering Bureau Group co., Ltd, Zhengzhou 450052, China 1092366742@qq.com, 240286295@qq.com Danying Gao School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China gdy@zzu.edu.cn A BSTRACT . Based on the Burgers model, by adding a damper unit, this paper proposes a new viscoelastic model with five units and eight parameters to characterize the viscoelastic deformation of fiber reinforced asphalt concrete (FRAC). According to the creep tests of FRAC beams, this paper studies both the parameters in the model and the viscoelastic behaviour of FRAC with different fiber volume fraction and aspect ratio. In this model, this paper establishes the viscoelastic constitutive equation of asphalt concrete, which takes into account the impacts of fiber content characteristic parameter. Both the experimental study and theoretical analysis show that the new model has a high correlation with the results of creep experiment and plays a key role in describing the whole creep process of FRAC. The fiber content characteristic parameter can comprehensively reflect the effects of the fiber volume fraction and aspect ratio on the viscoelastic behaviour of FRAC. Within the range of this test, the optimum fiber volume fraction, fiber aspect ratio and fiber content characteristic parameter are 0.35%, 324 and 1.13, respectively. K EYWORDS . Fiber reinforced asphalt concrete; Viscoelastic model; Viscoelastic performance; Creep test; Fiber content characteristic parameter. Citation: Huang, C., Wang, F., Gao, T., Gao, D., A new viscoelastic mechanics model for the creep behaviour of fibre reinforced asphalt concrete, Fratturaed Integrità Strutturale, 45 (2018) 108-120. Received: 22.03.2015 Accepted: 21.04.2018 Published: 01.07.2015 Copyright: © 2018 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION t normal temperature around 15 ° C, asphalt concrete (AC) and fiber reinforced asphalt concrete (FRAC) are typical viscoelastic materials. The various viscoelastic mechanics models can be formed by combining the basic A