Affiliation:
1. School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
2. Engineering Technology Research Center for Structural Vibration Control and Health Monitoring of Henan Province, Zhengzhou 450046, China
Abstract
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.
Subject
General Materials Science
Reference37 articles.
1. A Review of Previous Studies on the Reinforced Concrete Corbels;Dawood;IOP Conf. Ser. Mater. Sci. Eng.,2019
2. Experimental and Numerical Assessment of Corbels Designed Based on Strut-and-Tie Provisions;Khosravikia;J. Struct. Eng. ASCE,2018
3. Strength Prediction of Corbels Using Strut-and-Tie Model Analysis;Kassem;Int. J. Concr. Struct. Mater.,2015
4. Shear behaviour of high strength fiber reinforced concrete corbels;Hafez;J. Struct. Eng. ASCE,2012
5. The Behavior of Reinforced Concrete Corbels with Steel Fibers and Shear Strength Prediction;Wadekar;IJIRSET. ASCE,2016
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