Abstract
The results of a numerical experiment are presented, within the framework of which finite element modeling of the reinforced concrete beams support sections with external composite reinforcement beams inclined sections operation was carried out, as well as their comparison with the results of an experiment carried out on real laboratory samples, similarly reinforced on the support areas by external composite U-shaped cross clamps. The strength of inclined sections of both real laboratory specimens and their design models was considered. Both numerical and real experiments were carried out at three values of the shear fracture span: 1.5h0; 2.0h0 and 2.5h0. The obtained results of the numerical experiment are compared with the results of laboratory tests on beams in order to analyze the accuracy of the calculation results and to find the optimal method for modeling and taking into account the external composite reinforcement clamps in the design models that would most accurately reflect their contribution to the operation of the inclined section of bent reinforced concrete elements. For the numerical experiment, the method of finite element modeling of samples was used. An assessment of the method used for computational modeling of the operation of inclined sections reinforced with external composite reinforcement is given.
Highlights
The Building Code publication on the reinforcement of reinforced concrete structures with composite materials revealed many points of interest for scientific research in Russia
As part of a large-scale study of the work of reinforced concrete structures reinforced with composite materials, at the Department of Reinforced Concrete and Stone Structures, DSTU, the operation issues of reinforced concrete structures reinforced with round glass and carbon fiber reinforcement [1-4], the sections strength of reinforced concrete beams normal to the longitudinal axis of the element, reinforced external composite reinforcement
To confirm the reliability of the experimental data obtained during the reinforced inclined sections strength study, finite element modeling was performed in the LIRA-SAPR 2013 software package
Summary
The Building Code publication on the reinforcement of reinforced concrete structures with composite materials revealed many points of interest for scientific research in Russia. This interest is largely due to the fact that, many issues related to the operation of a reinforced concrete element reinforced with composite materials were not covered in the mentioned regulatory document. A study on the sections of reinforced concrete beams that are inclined to the longitudinal axis of the element, reinforced with external composite clamps in the presence and absence of initial inclined cracks was carried out [10-14].
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