Air-void-affected zone in concrete beam under four-point bending fracture
A series of numerical simulations were performed on prenotched four-point bending (FPB) concrete beams containing air voids of different sizes and locations by using the finite element method combined with the cohesive crack model. The void-affected zone was proposed for characterizing the effect of...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Vilnius Gediminas Technical University
2018-04-01
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| Series: | Journal of Civil Engineering and Management |
| Subjects: | |
| Online Access: | http://journals.vgtu.lt/index.php/JCEM/article/view/456 |
| _version_ | 1830338928800956416 |
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| author | Chuanchuan Zhang Xinhua Yang Hu Gao |
| author_facet | Chuanchuan Zhang Xinhua Yang Hu Gao |
| author_sort | Chuanchuan Zhang |
| collection | DOAJ |
| description | A series of numerical simulations were performed on prenotched four-point bending (FPB) concrete beams containing air voids of different sizes and locations by using the finite element method combined with the cohesive crack model. The void-affected zone was proposed for characterizing the effect of a void on a fracture, and its size was determined by moving an air void horizontally until the crack path changed. As a function of air void location and size, the dimensionless affected-zone radius was fitted according to the numerical results. Finally, the fracture processes of the pre-notched FPB concrete beams with randomly distributed voids were simulated numerically, and the affected-zone radius was used to explain the choice of crack paths to verify the prediction. It was found that the prediction is accurate for an isolated affected zone and is roughly approximate for an overlapped one. |
| first_indexed | 2024-12-19T20:49:15Z |
| format | Article |
| id | doaj.art-adaae6e7179846e4869235a939277de6 |
| institution | Directory Open Access Journal |
| issn | 1392-3730 1822-3605 |
| language | English |
| last_indexed | 2024-12-19T20:49:15Z |
| publishDate | 2018-04-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Civil Engineering and Management |
| spelling | doaj.art-adaae6e7179846e4869235a939277de62022-12-21T20:06:08ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052018-04-0124210.3846/jcem.2018.456Air-void-affected zone in concrete beam under four-point bending fractureChuanchuan Zhang0Xinhua Yang1Hu Gao2School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China; Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment, 1037 Luoyu Road, 430074 Wuhan, ChinaSchool of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, ChinaA series of numerical simulations were performed on prenotched four-point bending (FPB) concrete beams containing air voids of different sizes and locations by using the finite element method combined with the cohesive crack model. The void-affected zone was proposed for characterizing the effect of a void on a fracture, and its size was determined by moving an air void horizontally until the crack path changed. As a function of air void location and size, the dimensionless affected-zone radius was fitted according to the numerical results. Finally, the fracture processes of the pre-notched FPB concrete beams with randomly distributed voids were simulated numerically, and the affected-zone radius was used to explain the choice of crack paths to verify the prediction. It was found that the prediction is accurate for an isolated affected zone and is roughly approximate for an overlapped one.http://journals.vgtu.lt/index.php/JCEM/article/view/456concreteair voidfractureaffected-zonecohesive modelfour-point bending |
| spellingShingle | Chuanchuan Zhang Xinhua Yang Hu Gao Air-void-affected zone in concrete beam under four-point bending fracture Journal of Civil Engineering and Management concrete air void fracture affected-zone cohesive model four-point bending |
| title | Air-void-affected zone in concrete beam under four-point bending fracture |
| title_full | Air-void-affected zone in concrete beam under four-point bending fracture |
| title_fullStr | Air-void-affected zone in concrete beam under four-point bending fracture |
| title_full_unstemmed | Air-void-affected zone in concrete beam under four-point bending fracture |
| title_short | Air-void-affected zone in concrete beam under four-point bending fracture |
| title_sort | air void affected zone in concrete beam under four point bending fracture |
| topic | concrete air void fracture affected-zone cohesive model four-point bending |
| url | http://journals.vgtu.lt/index.php/JCEM/article/view/456 |
| work_keys_str_mv | AT chuanchuanzhang airvoidaffectedzoneinconcretebeamunderfourpointbendingfracture AT xinhuayang airvoidaffectedzoneinconcretebeamunderfourpointbendingfracture AT hugao airvoidaffectedzoneinconcretebeamunderfourpointbendingfracture |