Study on mechanical behavior and damage process of concrete with initial damage under eccentric load

Abstract In order to analyze the influence of eccentric load on mechanical properties and damage process of concrete with initial damage, the eccentric load compression tests of concrete under different confining pressures were carried out with the help of PFC particle flow program. The results show...

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Autores principales:	Ge Lina, Yi Fu, Zhou Junxia, Du Changbo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2843e8f162854a359d05e49e558670b1
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spelling	oai:doaj.org-article:2843e8f162854a359d05e49e558670b12021-12-02T18:50:47ZStudy on mechanical behavior and damage process of concrete with initial damage under eccentric load10.1038/s41598-021-95964-x2045-2322https://doaj.org/article/2843e8f162854a359d05e49e558670b12021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95964-xhttps://doaj.org/toc/2045-2322Abstract In order to analyze the influence of eccentric load on mechanical properties and damage process of concrete with initial damage, the eccentric load compression tests of concrete under different confining pressures were carried out with the help of PFC particle flow program. The results show that: the eccentric load does not change the relationship between peak stress, crack initiation stress and confining pressure of concrete under uniform load, but decrease the value of them. The peak stress increasing coefficient under uniform load is higher than that under eccentric load, and the peak stress increasing coefficient increases in a linear function with the confining pressure, and the increasing rate is approximately the same. Under uniaxial compression of eccentric load, a type I shear crack approximately parallel to the loading direction is formed, while under biaxial compression, a bending type shear crack with the lower tip of the initial crack as the inflection point is formed. The number of microcracks in concrete under uniform load and eccentric load can be divided into three stages: the calm period at the initial loading stage, the pre-peak expansion period from crack initiation point to peak point, and the rapid increase period after the peak.Ge LinaYi FuZhou JunxiaDu ChangboNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ge Lina Yi Fu Zhou Junxia Du Changbo Study on mechanical behavior and damage process of concrete with initial damage under eccentric load
description	Abstract In order to analyze the influence of eccentric load on mechanical properties and damage process of concrete with initial damage, the eccentric load compression tests of concrete under different confining pressures were carried out with the help of PFC particle flow program. The results show that: the eccentric load does not change the relationship between peak stress, crack initiation stress and confining pressure of concrete under uniform load, but decrease the value of them. The peak stress increasing coefficient under uniform load is higher than that under eccentric load, and the peak stress increasing coefficient increases in a linear function with the confining pressure, and the increasing rate is approximately the same. Under uniaxial compression of eccentric load, a type I shear crack approximately parallel to the loading direction is formed, while under biaxial compression, a bending type shear crack with the lower tip of the initial crack as the inflection point is formed. The number of microcracks in concrete under uniform load and eccentric load can be divided into three stages: the calm period at the initial loading stage, the pre-peak expansion period from crack initiation point to peak point, and the rapid increase period after the peak.
format	article
author	Ge Lina Yi Fu Zhou Junxia Du Changbo
author_facet	Ge Lina Yi Fu Zhou Junxia Du Changbo
author_sort	Ge Lina
title	Study on mechanical behavior and damage process of concrete with initial damage under eccentric load
title_short	Study on mechanical behavior and damage process of concrete with initial damage under eccentric load
title_full	Study on mechanical behavior and damage process of concrete with initial damage under eccentric load
title_fullStr	Study on mechanical behavior and damage process of concrete with initial damage under eccentric load
title_full_unstemmed	Study on mechanical behavior and damage process of concrete with initial damage under eccentric load
title_sort	study on mechanical behavior and damage process of concrete with initial damage under eccentric load
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2843e8f162854a359d05e49e558670b1
work_keys_str_mv	AT gelina studyonmechanicalbehavioranddamageprocessofconcretewithinitialdamageundereccentricload AT yifu studyonmechanicalbehavioranddamageprocessofconcretewithinitialdamageundereccentricload AT zhoujunxia studyonmechanicalbehavioranddamageprocessofconcretewithinitialdamageundereccentricload AT duchangbo studyonmechanicalbehavioranddamageprocessofconcretewithinitialdamageundereccentricload
_version_	1718377492444610560

Study on mechanical behavior and damage process of concrete with initial damage under eccentric load

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