Influence of flexural reinforcement in compression to crack pattern on reinforced graded concrete beams

The expected failure of the structure is an important parameter to consider when designing reinforced concrete beams. The magnitude of tensile and compressive stresses due to loading, which is determined by the reinforcement configuration, has a large influence on structural failures. The addition o...

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Bibliographic Details
Main Authors: Pratama, M. Mirza Abdillah, Maulana, Rizal, Istiqomah, Dinda Ainur, Dewi, Cynthia Permata, Karyadi
Format: Conference Proceeding
Language:English
Subjects:
Compressive properties
Concrete
Ductile fracture
Failure
Quality control
Reinforced concrete
Reinforcement
Reinforcing steels
Structural failure
Tensile stress
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Summary:The expected failure of the structure is an important parameter to consider when designing reinforced concrete beams. The magnitude of tensile and compressive stresses due to loading, which is determined by the reinforcement configuration, has a large influence on structural failures. The addition of reinforcing steel can improve the resistance of reinforced concrete beams to tensile stress, but it reduces the beam’s ductility. On the other hand, in recent years, reinforced concrete innovation has been developed in an effort to optimize the performance of beams by grading the quality of concrete. In comparison to normal concrete beams, reinforced graded concrete beams (RGCB) exhibit more complex behavior. Based on this, this study was carried out to investigate the effect of single and double reinforcement on RGCB. In the modeling, RGCB with concrete quality of 40 MPa on compressed fibers and 20 MPa on tensile fibers was modeled. The beam geometry is b=179 mm, h=358 mm, and the a/d ratio is 2.5. All specimens of the test object are designed with a low rebar ratio in the expectation that the beam will be ductile. The study’s findings are as follows: (1) the crack pattern created on the RGCG resembles a higher quality control concrete beam; (2) RGCB experience bending failure in the middle of the span followed by shear failure; (3) the use of different concrete strengths in RGCB creates an unsustainable cracking pattern; and (4) the use of double reinforcement on RGCG shows more distributed strain propagation compared to RGCG with single reinforcement.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0198532