Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation

Concrete three-point bending beams with preexisting cracks are widely used to study the growth process of I-II mixed mode cracks. Studying the failure characteristics of preexisting cracks at different locations on concrete three-point bending beams not only has important scientific significance but...

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Autores principales:	Liuqun Zhao, Li Zheng, Hui Qin, Tiesuo Geng, Yonggang Tan, Zhe Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/66822fb81b6e4fd4b4e17d76c7262858
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spelling	oai:doaj.org-article:66822fb81b6e4fd4b4e17d76c72628582021-11-29T00:55:28ZResearch on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation1468-812310.1155/2021/7892312https://doaj.org/article/66822fb81b6e4fd4b4e17d76c72628582021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/7892312https://doaj.org/toc/1468-8123Concrete three-point bending beams with preexisting cracks are widely used to study the growth process of I-II mixed mode cracks. Studying the failure characteristics of preexisting cracks at different locations on concrete three-point bending beams not only has important scientific significance but also has a wide range of engineering application backgrounds in the safety assessment of engineering structures. In this paper, through several numerical experiments, the influence of preexisting cracks at different positions on the failure characteristics of concrete three-point bending beams is studied, and three typical failure modes are obtained. The failure process of the specimens with three typical failure modes is discussed in detail, and it is pointed out that the crack failure mode is tensile failure. The change trends of bearing capacity, acoustic emission quantity, and acoustic emission energy of three typical failure modes are analyzed. The maximum bearing capacity, the maximum acoustic emission quantity, and energy of three failure modes of concrete three-point bending beams generally show an increasing trend.Liuqun ZhaoLi ZhengHui QinTiesuo GengYonggang TanZhe ZhangHindawi-WileyarticleGeologyQE1-996.5ENGeofluids, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 Liuqun Zhao Li Zheng Hui Qin Tiesuo Geng Yonggang Tan Zhe Zhang Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation
description	Concrete three-point bending beams with preexisting cracks are widely used to study the growth process of I-II mixed mode cracks. Studying the failure characteristics of preexisting cracks at different locations on concrete three-point bending beams not only has important scientific significance but also has a wide range of engineering application backgrounds in the safety assessment of engineering structures. In this paper, through several numerical experiments, the influence of preexisting cracks at different positions on the failure characteristics of concrete three-point bending beams is studied, and three typical failure modes are obtained. The failure process of the specimens with three typical failure modes is discussed in detail, and it is pointed out that the crack failure mode is tensile failure. The change trends of bearing capacity, acoustic emission quantity, and acoustic emission energy of three typical failure modes are analyzed. The maximum bearing capacity, the maximum acoustic emission quantity, and energy of three failure modes of concrete three-point bending beams generally show an increasing trend.
format	article
author	Liuqun Zhao Li Zheng Hui Qin Tiesuo Geng Yonggang Tan Zhe Zhang
author_facet	Liuqun Zhao Li Zheng Hui Qin Tiesuo Geng Yonggang Tan Zhe Zhang
author_sort	Liuqun Zhao
title	Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation
title_short	Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation
title_full	Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation
title_fullStr	Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation
title_full_unstemmed	Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation
title_sort	research on failure characteristics of concrete three-point bending beams with preexisting cracks in different positions based on numerical simulation
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/66822fb81b6e4fd4b4e17d76c7262858
work_keys_str_mv	AT liuqunzhao researchonfailurecharacteristicsofconcretethreepointbendingbeamswithpreexistingcracksindifferentpositionsbasedonnumericalsimulation AT lizheng researchonfailurecharacteristicsofconcretethreepointbendingbeamswithpreexistingcracksindifferentpositionsbasedonnumericalsimulation AT huiqin researchonfailurecharacteristicsofconcretethreepointbendingbeamswithpreexistingcracksindifferentpositionsbasedonnumericalsimulation AT tiesuogeng researchonfailurecharacteristicsofconcretethreepointbendingbeamswithpreexistingcracksindifferentpositionsbasedonnumericalsimulation AT yonggangtan researchonfailurecharacteristicsofconcretethreepointbendingbeamswithpreexistingcracksindifferentpositionsbasedonnumericalsimulation AT zhezhang researchonfailurecharacteristicsofconcretethreepointbendingbeamswithpreexistingcracksindifferentpositionsbasedonnumericalsimulation
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Research on Failure Characteristics of Concrete Three-Point Bending Beams with Preexisting Cracks in Different Positions Based on Numerical Simulation

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