Effect of High Performance Fiber Reinforced Cementitious Composites (HPFRCC) and Transverse Reinforcement on the plastic Hinge Characteristics and Moment Redistribution in Continuous Concrete Beams

Document Type : Research Paper

Authors

1 Faculty of Engineering, Islamic Azad University, Semnan, Iran

2 Civil Eng. Faculty, Semnan University

10.22124/jcr.2022.15837.1426

Abstract

In this paper, the results of Experimental Investigation Determination the Moment Redistribution and Plastic Hinge in continuous concrete Beams by replacing normal Concrete with HPFRCC and reducing the spacing of the stirrups are presented. Eight specimens of beam with reinforced concrete and fiber reinforced cement composites with bending distance were considered as three groups of A, B and C. Group A consisted of two conventional bending beams with standard bending intervals (d/2) (reference sample) and compact (d/4). Group B consists of four beams made of reinforced cement composites reinforced as a layer with non-compressive bending intervals (d/2) and Group C comprises two beams made of reinforced cement composites. Strong fibers were fully compressed (d/2) and compressed (d/4). Experimental results showed that using reinforced cement composite reinforced fibers instead of normal concrete in different parts of beams and the use of compacted stirrups increased the ductility of beams. In the specimens made of HPFRCC with compressive stirrups, bearing capacity, displacement ductility and energy ductility increased by 35, 77 and 83%, respectively, compared to the reference sample. The highest amount of moment redistribution, occurred in the specimen made with HPFRCC in the lower part with 1.51 times the reference beam.

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References

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