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Author:

Tan, Zhifei (Tan, Zhifei.) | Leng, Zhen (Leng, Zhen.) | Li, Hui (Li, Hui.) | Ashish, Prabin Kumar (Ashish, Prabin Kumar.) | Cai, Xing (Cai, Xing.) | Cao, Peng (Cao, Peng.) | Sreeram, Anand (Sreeram, Anand.)

Indexed by:

EI Scopus SCIE

Abstract:

Asphalt concrete (AC) exhibits noticeable tension -compression (TC) asymmetry, but it is typically considered isotropic in pavement design. This study aims to quantitatively evaluate the effect of AC's TC asymmetry on pavement response under loading through numerical modeling. To achieve this objective, a temperaturedependent dual viscoelastic constitutive model was applied to incorporate AC's TC asymmetry into pavement modeling. Besides, three pavement structure models, including one with thick AC layers, one with thin AC layers, and one with a Portland cement concrete (PCC) base, were developed. The responses of the three pavement structures under traffic and environmental loading conditions were simulated. Modeling results showed that AC's TC asymmetry can significantly increase the vertical strain in AC, leading to higher stress concentration and larger deformation in AC layers. Unlike the conventional understanding that tensile strain concentrates at the bottom of AC layers, high tensile strains were observed in the top AC layers, especially for the pavement with thick AC layers or a PCC base, which may lead to top -down cracking. High tensile strains were observed on the granular subbase for the pavement with thin AC layers, which may induce bottom -up cracking. Besides, AC's TC asymmetry also significantly increases the shear strains, especially the horizontal shear strain in AC layers, which may result in debonding and shoving distresses in AC layers. It was also noticed that the pavement response highly depends on its temperature and vehicular speed. A higher temperature or lower vehicular speed leads to more significant AC's TC asymmetry as well as its effects on asphalt pavement's response. The outcomes of this study are expected to help enhance the design and maintenance of more durable asphalt pavement.

Keyword:

Viscoelastic Pavement Structures Finite Element Analysis Tension-Compression Asymmetry

Author Community:

  • [ 1 ] [Tan, Zhifei]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
  • [ 2 ] [Leng, Zhen]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
  • [ 3 ] [Li, Hui]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
  • [ 4 ] [Ashish, Prabin Kumar]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
  • [ 5 ] [Li, Hui]Southeast Univ, Sch Transportat, Nanjing 211189, Peoples R China
  • [ 6 ] [Cai, Xing]Southeast Univ, Sch Transportat, Nanjing 211189, Peoples R China
  • [ 7 ] [Ashish, Prabin Kumar]Indian Inst Technol Kanpur, Dept Civil Engn, Kanpur, India
  • [ 8 ] [Cao, Peng]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100081, Peoples R China
  • [ 9 ] [Sreeram, Anand]Univ Nottingham, Nottingham Transportat Engn Ctr, Dept Civil Engn, Nottingham, England
  • [ 10 ] [Leng, Zhen]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China

Reprint Author's Address:

  • [Leng, Zhen]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;;

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Source :

CONSTRUCTION AND BUILDING MATERIALS

ISSN: 0950-0618

Year: 2024

Volume: 430

7 . 4 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 6

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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