1. Shear behavior of concrete beams reinforced exclusively with longitudinal glass fiber reinforced polymer bars: Analytical model
- Author
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Joaquim A. O. Barros, Renata Kotynia, Monika Kaszubska, Hadi Baghi, and Universidade do Minho
- Subjects
reinforced concrete beam ,Science & Technology ,Materials science ,Concrete beams ,0211 other engineering and technologies ,Glass fiber reinforced polymer ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,shear failure ,GFRP flexural reinforcement ,0201 civil engineering ,sensitivity analysis ,Shear (geology) ,Mechanics of Materials ,021105 building & construction ,simplified modified compression field theory ,General Materials Science ,Composite material ,Civil and Structural Engineering - Abstract
A design approach based on the simplified modified compression field theory, but with the advantage of not requiring an iterative procedure, is proposed for evaluating the shear capacity of beams without including shear reinforcement. This model is capable of simulating beams flexurally reinforced with steel and fiber reinforced polymer (FRP) systems. To appraise the predictive performance of the proposed model, a database (DB) composed of 215 reinforced concrete beams without shear reinforcement is set. By applying the model to this DB, an average value for V-exp./V-ana. of 1.05 with a COV of 24% is obtained, where V-exp. and V-ana. are the shear capacity registered experimentally and obtained with the model, respectively. By applying the approach proposed by ACI Building Code to the DB, average and COV values of 0.91 and 42% are determined, revealing the higher predictive performance of the proposed model. This was even higher in the beams flexurally reinforced with FRP systems, since the proposed model conducted to average and the COV values of 1.0 and 22%, while 0.76 and 32% were obtained with the ACI approach. When proposed model was applied to the beams tested in the experimental program carried out, an average and COV values of 1.02 and 5.23% were determined., The second author wishes to acknowledge the grant SFRH/BSAB/114302/2016 provided by FCT. The support of the FCT through the project PTDC/ECM-EST/1882/2014 is acknowledged., info:eu-repo/semantics/publishedVersion
- Published
- 2018