Cargando…

Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay

In order to describe the fatigue damage state of asphalt mixture more reasonably, direct tensile tests of the fatigue and the residual strength under stress levels of 1.00 MPa, 0.50 MPa and 0.25 MPa with five parallel tests were carried out. The trabecular specimens of AC-13C asphalt mixture (25 cm...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, Hongfu, Yang, Xinyu, Xia, Chengdong, Zheng, Jianlong, Huang, Tuo, Lv, Songtao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678437/
https://www.ncbi.nlm.nih.gov/pubmed/31336712
http://dx.doi.org/10.3390/ma12142236
_version_ 1783441100699074560
author Liu, Hongfu
Yang, Xinyu
Xia, Chengdong
Zheng, Jianlong
Huang, Tuo
Lv, Songtao
author_facet Liu, Hongfu
Yang, Xinyu
Xia, Chengdong
Zheng, Jianlong
Huang, Tuo
Lv, Songtao
author_sort Liu, Hongfu
collection PubMed
description In order to describe the fatigue damage state of asphalt mixture more reasonably, direct tensile tests of the fatigue and the residual strength under stress levels of 1.00 MPa, 0.50 MPa and 0.25 MPa with five parallel tests were carried out. The trabecular specimens of AC-13C asphalt mixture (25 cm × 5 cm × 5 cm) were manufactured with Styrene-Butadiene-Styrene (SBS) modified asphalt, aggregate basalt and limestone mineral filler. The optimum asphalt-aggregate ratio was 5.2%. The dynamic modulus decay and the residual strength decay were termed as the damage variables to evaluate the fatigue damage process of asphalt mixtures, respectively. Based on the test results, the decay patterns of the dynamic modulus and the residual strength during fatigue tests under different stress states were revealed, and the model and the parameters of fatigue damage according to the corresponding decay patterns were obtained. Then, based on the assumption that the residual strength and dynamic modulus depend on the same damage state, the relationship between the two damage definitions was given, and the residual strength-dynamic modulus coupled model was established. The results showed that the residual strength-dynamic modulus coupled model could better describe the fatigue damage evolution law of asphalt mixture, and the parameter of this coupled model could be obtained by less residual strength tests. A modified formula for calculating the damage variables associated with residual strength and dynamic modulus was proposed based on the relationship between two kinds of damage variables.
format Online
Article
Text
id pubmed-6678437
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-66784372019-08-19 Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay Liu, Hongfu Yang, Xinyu Xia, Chengdong Zheng, Jianlong Huang, Tuo Lv, Songtao Materials (Basel) Article In order to describe the fatigue damage state of asphalt mixture more reasonably, direct tensile tests of the fatigue and the residual strength under stress levels of 1.00 MPa, 0.50 MPa and 0.25 MPa with five parallel tests were carried out. The trabecular specimens of AC-13C asphalt mixture (25 cm × 5 cm × 5 cm) were manufactured with Styrene-Butadiene-Styrene (SBS) modified asphalt, aggregate basalt and limestone mineral filler. The optimum asphalt-aggregate ratio was 5.2%. The dynamic modulus decay and the residual strength decay were termed as the damage variables to evaluate the fatigue damage process of asphalt mixtures, respectively. Based on the test results, the decay patterns of the dynamic modulus and the residual strength during fatigue tests under different stress states were revealed, and the model and the parameters of fatigue damage according to the corresponding decay patterns were obtained. Then, based on the assumption that the residual strength and dynamic modulus depend on the same damage state, the relationship between the two damage definitions was given, and the residual strength-dynamic modulus coupled model was established. The results showed that the residual strength-dynamic modulus coupled model could better describe the fatigue damage evolution law of asphalt mixture, and the parameter of this coupled model could be obtained by less residual strength tests. A modified formula for calculating the damage variables associated with residual strength and dynamic modulus was proposed based on the relationship between two kinds of damage variables. MDPI 2019-07-11 /pmc/articles/PMC6678437/ /pubmed/31336712 http://dx.doi.org/10.3390/ma12142236 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Hongfu
Yang, Xinyu
Xia, Chengdong
Zheng, Jianlong
Huang, Tuo
Lv, Songtao
Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay
title Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay
title_full Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay
title_fullStr Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay
title_full_unstemmed Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay
title_short Nonlinear Fatigue Damage Model of Asphalt Mixture Based on Dynamic Modulus and Residual Strength Decay
title_sort nonlinear fatigue damage model of asphalt mixture based on dynamic modulus and residual strength decay
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6678437/
https://www.ncbi.nlm.nih.gov/pubmed/31336712
http://dx.doi.org/10.3390/ma12142236
work_keys_str_mv AT liuhongfu nonlinearfatiguedamagemodelofasphaltmixturebasedondynamicmodulusandresidualstrengthdecay
AT yangxinyu nonlinearfatiguedamagemodelofasphaltmixturebasedondynamicmodulusandresidualstrengthdecay
AT xiachengdong nonlinearfatiguedamagemodelofasphaltmixturebasedondynamicmodulusandresidualstrengthdecay
AT zhengjianlong nonlinearfatiguedamagemodelofasphaltmixturebasedondynamicmodulusandresidualstrengthdecay
AT huangtuo nonlinearfatiguedamagemodelofasphaltmixturebasedondynamicmodulusandresidualstrengthdecay
AT lvsongtao nonlinearfatiguedamagemodelofasphaltmixturebasedondynamicmodulusandresidualstrengthdecay