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Shear strength of reinforced concrete beam-column joints with crossed inclined bars
Graphical abstract
HighlightsAn analytical model is developed to predict the joint shear strength with X-bars.Failure criteria quantify the contribution of X-bars to the joint shear capacity.Applicable to RC joints with X-bars with/without conventional shear reinforcement.Model is verified by comparing analytical results with test data from literature.Strength graphs are plotted using this procedure as analysis – design tool.
AbstractA new analytical approach for the evaluation of the shear strength of reinforced concrete beam-column joints with crossed inclined reinforcement is developed. The proposed model considers that a joint member resists to the applied shear via three mechanisms, the concrete diagonal strut, the steel conventional shear reinforcement truss and the X-bars truss. Failure criteria are adopted in order to quantify the contribution of the crossed inclined bars to the shear capacity of the joint. The joint shear strength is calculated using a simple expression as a function of the shear resistance of the joint without X-bars. The developed procedure is applicable to beam-column joint elements with crossed inclined reinforcement as the only shear reinforcement in the joint region or with the combination of X-bars and conventional horizontal or/and vertical shear reinforcement. The proposed approach is verified by comparisons between analytically predicted shear strength values and experimentally obtained ones derived from the literature. The parameters that influence the shear capacity of joints with X-bars have been investigated and special design graphs have been plotted for designing the crossed inclined reinforcement in the joint area. The application of the proposed approach has been illustrated by three numerical examples.
Shear strength of reinforced concrete beam-column joints with crossed inclined bars
Graphical abstract
HighlightsAn analytical model is developed to predict the joint shear strength with X-bars.Failure criteria quantify the contribution of X-bars to the joint shear capacity.Applicable to RC joints with X-bars with/without conventional shear reinforcement.Model is verified by comparing analytical results with test data from literature.Strength graphs are plotted using this procedure as analysis – design tool.
AbstractA new analytical approach for the evaluation of the shear strength of reinforced concrete beam-column joints with crossed inclined reinforcement is developed. The proposed model considers that a joint member resists to the applied shear via three mechanisms, the concrete diagonal strut, the steel conventional shear reinforcement truss and the X-bars truss. Failure criteria are adopted in order to quantify the contribution of the crossed inclined bars to the shear capacity of the joint. The joint shear strength is calculated using a simple expression as a function of the shear resistance of the joint without X-bars. The developed procedure is applicable to beam-column joint elements with crossed inclined reinforcement as the only shear reinforcement in the joint region or with the combination of X-bars and conventional horizontal or/and vertical shear reinforcement. The proposed approach is verified by comparisons between analytically predicted shear strength values and experimentally obtained ones derived from the literature. The parameters that influence the shear capacity of joints with X-bars have been investigated and special design graphs have been plotted for designing the crossed inclined reinforcement in the joint area. The application of the proposed approach has been illustrated by three numerical examples.
Shear strength of reinforced concrete beam-column joints with crossed inclined bars
Chalioris, Constantin E. (author) / Bantilas, Kosmas E. (author)
Engineering Structures ; 140 ; 241-255
2017-02-28
15 pages
Article (Journal)
Electronic Resource
English
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