An optimal method of determining the position of bends on shear reinforcement as part of the diagnosis of reinforced concrete beam structures

This paper presents the findings of an experimental data on the effects of inclined shearreinforcement in reinforced concrete (RC) beam. Two types of shear reinforcement of RC beamwere investigated, conventional stirrups (vertical links) and inclined shear reinforcement (45degrees of inclined shear reinforcement). The RC beam with conventional stirrups wasdesignated as a control specimen. The RC beams with different types of shear reinforcementwere tested for shear under four-point loading system. Comparisons were made between bothtypes of RC beam on load-deflection, load-steel strain, load-concrete strain behaviour and modeof failure. The theoretical and experimental were calculated by using conventional formulation inaccordance to EC 2 in order to verify the experimental results. From the results, it was observedthat the RC beam with 45 degree inclined shear reinforcement improved structural performancein shear by approximately 20% and thus prolong the shear failure behaviour as compared to theRC beam with vertical links.

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Crack formation and crack propagation into the compression zone on reinforced concrete beam structures

International Journal of Computational Methods and Experimental Measurements ◽

10.2495/cmem-v5-n2-116-124 ◽

2017 ◽

Vol 5 (2) ◽

pp. 116-124

Author(s):

Samdar Kakay ◽

Daniel BÅrdsen ◽

Ove T. Gudmestad

Keyword(s):

Reinforced Concrete ◽

Crack Propagation ◽

Concrete Beam ◽

Crack Formation ◽

Reinforced Concrete Beam ◽

Compression Zone ◽

Beam Structures

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Shear behavior of fly ash reinforced concrete beam without shear reinforcement

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/602/1/012104 ◽

2019 ◽

Vol 602 ◽

pp. 012104

Author(s):

A E Nasution ◽

R Kurniawan ◽

R Thamrin

Keyword(s):

Reinforced Concrete ◽

Fly Ash ◽

Concrete Beam ◽

Reinforced Concrete Beam ◽

Shear Behavior ◽

Shear Reinforcement

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Evolutionary Optimization Of Normally Operated Reinforced Concrete Beam Structures Taking Into Account The Risk Of Accidents

Promyshlennoe i Grazhdanskoe Stroitel stvo ◽

10.33622/0869-7019.2019.09.45-50 ◽

2019 ◽

pp. 45-50

Keyword(s):

Reinforced Concrete ◽

Cross Sections ◽

Concrete Beam ◽

Reinforced Concrete Beam ◽

Operating Conditions ◽

Evolutionary Modeling ◽

Beam Structures ◽

Variable Parameters ◽

Evolutionary Operators ◽

Random Change

An algorithm for search optimizing reinforced concrete beam systems using the theory of evolutionary modeling has been developed. The search for this solution is performed on the formed areas of permissible values of the variable parameters represented by discrete sets of values. These parameters are dimensions of the cross sections of an element, a concrete class, a class and diameters of steel reinforcement. One of the main active constraints is the value of cost expression of the material losses risk in case of possible structure failure. The main difference between the proposed algorithm and classical evolutionary methods is the use of a new controlled random change operator to find the solution in the iterative process. Herewith other evolutionary operators are not used. To assess the productivity of the proposed algorithm, an example of a two-span beam designing is given. The presented developments make it possible to obtain design solutions for reinforced concrete beam structures taking into account the optimal ratio of costs for the structure manufacturing and the risks costs of its failure under normal operating conditions.

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