Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups
To determine the validity of steel fiber reinforced expanded-shale lightweight concrete (SFRELC) applied in structures, the shear behavior of SFRELC structural components needs to be understood. In this paper, four-point bending tests were carried out on reinforced SFRELC beams with stirrups and a v...
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MDPI AG
2021-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/5/1107 |
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| author | Changyong Li Minglei Zhao Xiaoyan Zhang Jie Li Xiaoke Li Mingshuang Zhao |
| author_facet | Changyong Li Minglei Zhao Xiaoyan Zhang Jie Li Xiaoke Li Mingshuang Zhao |
| author_sort | Changyong Li |
| collection | DOAJ |
| description | To determine the validity of steel fiber reinforced expanded-shale lightweight concrete (SFRELC) applied in structures, the shear behavior of SFRELC structural components needs to be understood. In this paper, four-point bending tests were carried out on reinforced SFRELC beams with stirrups and a varying volume fraction of steel fiber from 0.4% to 1.6%. The shear cracking force, shear crack width and distribution pattern, mid-span deflection, and failure modes of test beams were recorded. Results indicate that the shear failure modes of reinforced SFRELC beams with stirrups were modified from brittle to ductile and could be transferred to the flexure mode with the increasing volume fraction of steel fiber. The coupling of steel fibers with stirrups contributed to the shear cracking force and the shear capacity provided by the SFRELC, and it improved the distribution of shear cracks. At the limit loading level of beams in building structures at serviceability, the maximum width of shear cracks could be controlled within 0.3 mm and 0.2 mm with the volume fraction of steel fiber increased from 0.4% to 0.8%. Finally, the formulas are proposed for the prediction of shear-cracking force, shear crack width, and shear capacity of reinforced SFRELC beams with stirrups. |
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| format | Article |
| id | doaj.art-b1445964cf9a41d2ab6d780ed692710d |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T00:28:42Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b1445964cf9a41d2ab6d780ed692710d2023-12-11T18:40:22ZengMDPI AGMaterials1996-19442021-02-01145110710.3390/ma14051107Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with StirrupsChangyong Li0Minglei Zhao1Xiaoyan Zhang2Jie Li3Xiaoke Li4Mingshuang Zhao5International Joint Research Lab for Eco-Building Materials and Engineering of Henan, School of Civil Engineering and Communications, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaSchool of Engineering, RMIT University, Melbourne, VIC 3003, AustraliaInternational Joint Research Lab for Eco-Building Materials and Engineering of Henan, School of Civil Engineering and Communications, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaSchool of Engineering, RMIT University, Melbourne, VIC 3003, AustraliaInternational Joint Research Lab for Eco-Building Materials and Engineering of Henan, School of Civil Engineering and Communications, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaInternational Joint Research Lab for Eco-Building Materials and Engineering of Henan, School of Civil Engineering and Communications, North China University of Water Resources and Electric Power, Zhengzhou 450045, ChinaTo determine the validity of steel fiber reinforced expanded-shale lightweight concrete (SFRELC) applied in structures, the shear behavior of SFRELC structural components needs to be understood. In this paper, four-point bending tests were carried out on reinforced SFRELC beams with stirrups and a varying volume fraction of steel fiber from 0.4% to 1.6%. The shear cracking force, shear crack width and distribution pattern, mid-span deflection, and failure modes of test beams were recorded. Results indicate that the shear failure modes of reinforced SFRELC beams with stirrups were modified from brittle to ductile and could be transferred to the flexure mode with the increasing volume fraction of steel fiber. The coupling of steel fibers with stirrups contributed to the shear cracking force and the shear capacity provided by the SFRELC, and it improved the distribution of shear cracks. At the limit loading level of beams in building structures at serviceability, the maximum width of shear cracks could be controlled within 0.3 mm and 0.2 mm with the volume fraction of steel fiber increased from 0.4% to 0.8%. Finally, the formulas are proposed for the prediction of shear-cracking force, shear crack width, and shear capacity of reinforced SFRELC beams with stirrups.https://www.mdpi.com/1996-1944/14/5/1107steel fiber reinforced expanded-shale lightweight concrete (SFRELC)reinforced SFRELC beamstirrupsvolume fraction of steel fibershear crackingshear crack width |
| spellingShingle | Changyong Li Minglei Zhao Xiaoyan Zhang Jie Li Xiaoke Li Mingshuang Zhao Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups Materials steel fiber reinforced expanded-shale lightweight concrete (SFRELC) reinforced SFRELC beam stirrups volume fraction of steel fiber shear cracking shear crack width |
| title | Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups |
| title_full | Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups |
| title_fullStr | Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups |
| title_full_unstemmed | Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups |
| title_short | Effect of Steel Fiber Content on Shear Behavior of Reinforced Expanded-Shale Lightweight Concrete Beams with Stirrups |
| title_sort | effect of steel fiber content on shear behavior of reinforced expanded shale lightweight concrete beams with stirrups |
| topic | steel fiber reinforced expanded-shale lightweight concrete (SFRELC) reinforced SFRELC beam stirrups volume fraction of steel fiber shear cracking shear crack width |
| url | https://www.mdpi.com/1996-1944/14/5/1107 |
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