Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels
As short cantilever members, corbels are mainly used to transfer eccentric loads to columns. Because of the discontinuity of load and geometric structure, corbels cannot be analyzed and designed using the method based on beam theory. Nine steel-fiber-reinforced high-strength concrete (SFRHSC) corbel...
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MDPI AG
2023-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/8/3055 |
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| author | Shu-Shan Li Jin-Yan Zheng Jun-Hong Zhang Hong-Mei Li Gui-Qiang Guo Ai-Jiu Chen Wei Xie |
| author_facet | Shu-Shan Li Jin-Yan Zheng Jun-Hong Zhang Hong-Mei Li Gui-Qiang Guo Ai-Jiu Chen Wei Xie |
| author_sort | Shu-Shan Li |
| collection | DOAJ |
| description | As short cantilever members, corbels are mainly used to transfer eccentric loads to columns. Because of the discontinuity of load and geometric structure, corbels cannot be analyzed and designed using the method based on beam theory. Nine steel-fiber-reinforced high-strength concrete (SFRHSC) corbels were tested. The width of the corbels was 200 mm, the cross-section height of the corbel column was 450 mm, and the cantilever end height was 200 mm. The shear span/depth ratios considered were 0.2, 0.3, and 0.4; the longitudinal reinforcement ratios were 0.55%, 0.75%, and 0.98%; the stirrup reinforcement ratios were 0.39%, 0.52%, and 0.785%; and the steel fiber volume ratios were 0, 0.75%, and 1.5%. According to the test results, this paper discusses the failure process and failure mode of corbel specimens with a small shear span/depth ratio and analyzes the effects of variables such as shear span/depth ratio, longitudinal reinforcement ratio, stirrup reinforcement ratio, and steel fiber volume content on the shear capacity of corbels. The shear capacity of corbels is significantly affected by the shear span/depth ratio, followed by the longitudinal reinforcement ratio and the stirrup reinforcement ratio. Moreover, it is shown that steel fibers have little impact on the failure mode and ultimate load of corbels, but can enhance the crack resistance of corbels. In addition, the bearing capacities of these corbels were calculated by Chinese code GB 50010-2010 and further compared with ACI 318-19 code, EN 1992-1-1:2004 code, and CSA A23.3-19 code, which adopt the strut-and-tie model. The results indicate that the calculation results by the empirical formula in the Chinese code are close to the corresponding test results, while the calculation method based on the strut-and-tie model of a clear mechanical concept yields conservative results, and hence the related parameter values must be further modified. |
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| issn | 1996-1944 |
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| spelling | doaj.art-4b93f7c6312f4ab1beddbc6c7a2317052023-11-17T20:12:26ZengMDPI AGMaterials1996-19442023-04-01168305510.3390/ma16083055Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete CorbelsShu-Shan Li0Jin-Yan Zheng1Jun-Hong Zhang2Hong-Mei Li3Gui-Qiang Guo4Ai-Jiu Chen5Wei Xie6School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaAs short cantilever members, corbels are mainly used to transfer eccentric loads to columns. Because of the discontinuity of load and geometric structure, corbels cannot be analyzed and designed using the method based on beam theory. Nine steel-fiber-reinforced high-strength concrete (SFRHSC) corbels were tested. The width of the corbels was 200 mm, the cross-section height of the corbel column was 450 mm, and the cantilever end height was 200 mm. The shear span/depth ratios considered were 0.2, 0.3, and 0.4; the longitudinal reinforcement ratios were 0.55%, 0.75%, and 0.98%; the stirrup reinforcement ratios were 0.39%, 0.52%, and 0.785%; and the steel fiber volume ratios were 0, 0.75%, and 1.5%. According to the test results, this paper discusses the failure process and failure mode of corbel specimens with a small shear span/depth ratio and analyzes the effects of variables such as shear span/depth ratio, longitudinal reinforcement ratio, stirrup reinforcement ratio, and steel fiber volume content on the shear capacity of corbels. The shear capacity of corbels is significantly affected by the shear span/depth ratio, followed by the longitudinal reinforcement ratio and the stirrup reinforcement ratio. Moreover, it is shown that steel fibers have little impact on the failure mode and ultimate load of corbels, but can enhance the crack resistance of corbels. In addition, the bearing capacities of these corbels were calculated by Chinese code GB 50010-2010 and further compared with ACI 318-19 code, EN 1992-1-1:2004 code, and CSA A23.3-19 code, which adopt the strut-and-tie model. The results indicate that the calculation results by the empirical formula in the Chinese code are close to the corresponding test results, while the calculation method based on the strut-and-tie model of a clear mechanical concept yields conservative results, and hence the related parameter values must be further modified.https://www.mdpi.com/1996-1944/16/8/3055SFRHSCcorbelsmall shear span/depth ratioshear capacitystrut-and-tie model |
| spellingShingle | Shu-Shan Li Jin-Yan Zheng Jun-Hong Zhang Hong-Mei Li Gui-Qiang Guo Ai-Jiu Chen Wei Xie Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels Materials SFRHSC corbel small shear span/depth ratio shear capacity strut-and-tie model |
| title | Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels |
| title_full | Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels |
| title_fullStr | Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels |
| title_full_unstemmed | Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels |
| title_short | Experimental Investigation on Shear Capacity of Steel-Fiber-Reinforced High-Strength Concrete Corbels |
| title_sort | experimental investigation on shear capacity of steel fiber reinforced high strength concrete corbels |
| topic | SFRHSC corbel small shear span/depth ratio shear capacity strut-and-tie model |
| url | https://www.mdpi.com/1996-1944/16/8/3055 |
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