A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.

MTS-810 material testing machine and acoustic emission signal analyzer were adopted to explore the mechanical behavior of concrete beams broken by the static load and the nonlinear cumulative damage law of concrete beams broken by fatigue bending from single-stage loading. Then, by introducing the R...

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Autores principales:	Liang Lei, Shi Xingang, Cui Yunhua, Wang Lefan, Yan Xiangcheng
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/30e7b578c2f64697824932ecb4898e60
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spelling	oai:doaj.org-article:30e7b578c2f64697824932ecb4898e602021-12-02T20:15:13ZA new fatigue damage model for pavement concrete beams bearing multi-level bending loads.1932-620310.1371/journal.pone.0255048https://doaj.org/article/30e7b578c2f64697824932ecb4898e602021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0255048https://doaj.org/toc/1932-6203MTS-810 material testing machine and acoustic emission signal analyzer were adopted to explore the mechanical behavior of concrete beams broken by the static load and the nonlinear cumulative damage law of concrete beams broken by fatigue bending from single-stage loading. Then, by introducing the Ramesh Talreja's Damage Criterion, the damage rule of single-stage loading was extended to the damage accumulation rule under multi-stage loading, and the results were verified by the results of two-stage and three-stage fatigue loading tests. Two main conclusions are achieved: first, affected by four-point bending load, the fatigue life of the concrete specimen is in line with the law of the two-parameter Weibull distribution, namely the higher the stress level is, the shorter the fatigue life is. Second, an obvious nonlinear relationship was discovered in the damage of concrete. The model deduced in this paper and the Palmgren-Miner linear damage accumulation model were adopted to compare the test results of flexural fatigue under single, two and three stage loads. The calculation results of this model were more reliable.Liang LeiShi XingangCui YunhuaWang LefanYan XiangchengPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 8, p e0255048 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Liang Lei Shi Xingang Cui Yunhua Wang Lefan Yan Xiangcheng A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
description	MTS-810 material testing machine and acoustic emission signal analyzer were adopted to explore the mechanical behavior of concrete beams broken by the static load and the nonlinear cumulative damage law of concrete beams broken by fatigue bending from single-stage loading. Then, by introducing the Ramesh Talreja's Damage Criterion, the damage rule of single-stage loading was extended to the damage accumulation rule under multi-stage loading, and the results were verified by the results of two-stage and three-stage fatigue loading tests. Two main conclusions are achieved: first, affected by four-point bending load, the fatigue life of the concrete specimen is in line with the law of the two-parameter Weibull distribution, namely the higher the stress level is, the shorter the fatigue life is. Second, an obvious nonlinear relationship was discovered in the damage of concrete. The model deduced in this paper and the Palmgren-Miner linear damage accumulation model were adopted to compare the test results of flexural fatigue under single, two and three stage loads. The calculation results of this model were more reliable.
format	article
author	Liang Lei Shi Xingang Cui Yunhua Wang Lefan Yan Xiangcheng
author_facet	Liang Lei Shi Xingang Cui Yunhua Wang Lefan Yan Xiangcheng
author_sort	Liang Lei
title	A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
title_short	A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
title_full	A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
title_fullStr	A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
title_full_unstemmed	A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
title_sort	new fatigue damage model for pavement concrete beams bearing multi-level bending loads.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/30e7b578c2f64697824932ecb4898e60
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A new fatigue damage model for pavement concrete beams bearing multi-level bending loads.

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