Structural Performance of Concrete Corners Reinforced with Different Steel Reinforced Detail under Static Loading
Publication: Forensic Engineering 2022
ABSTRACT
Concrete corners are found in different structures, such as portal frame buildings, bridges, and retaining walls. In the literature, there is limited information regarding the effect of the reinforcing detail on the structural performance of concrete corners subjected to concentrated loading. This research aims to study the structural behavior of concrete corners reinforced with different steel reinforcement patterns. The experimental work includes the investigation of concrete corners reinforced with ten different steel bar patterns at the corner vicinity. Steel fiber was added to the concrete mix to investigate its impact on the corner performance. Results show that the ultimate strength of the concrete corners reinforced with additional steel area increased compared with the reference corners with no additional reinforcement. The results also show the significant effects of steel fiber reinforced concrete material on flexural strength compared with the same corner details tested without using steel fiber. The ultimate strength increased as high as 39%, while the cracking loads increased up to 26.6% for some corners. Also, efficiency (ultimate/calculated load) increased between 1.06 and 35.44%. Furthermore, it was observed that steel fibers improve the tensile response, limit the crack propagation, improve the retained strength, and alter the mode of failure. Two types of failure were observed at the concrete corners, bearing, and flexural failures. The bearing failure occurred due to the diagonal cracks propagated at the corner vicinity. In contrast, the other type of failure, called the flexural failure, occurred due to the cracks propagated in areas beyond the corner vicinity.
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Forensic Engineering 2022
Pages: 1109 - 1120
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Published online: Nov 2, 2022
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