Rami maytham khadim
Department of Civil Engineering/ College of Engineering of the University of Kufa
Najaf /Iraq, civilrami318@gmail.com
Muhammad Abdel Attiya
Department of Civil Engineering/ College of Engineering of the University of Kufa
Najaf /Iraq, mohammedw.alfatlawi@uokufa.edu.iq
Abstract
: The purpose of this search has presented an experimental and theoretical study of behavior of T-section beams created using regular concrete (normal) and hybrid T-section beams with stratus formed using traditional concrete (normal) and (RPC) - reactive powder concrete. As part of the experimental work, casting and flexure tests were conducted on eight T-section reinforced concrete beams simply- supported at various locations for the large web opening. The RPC layer and the number of openings, are the main variables that this research studies its effect on ultimate loads and cracking loads, along with the mid-span deflection conduct of every NC beam and hybrid with the RPC layer in the tension zone or the compression. In addition to the tension and compression, all tested beams' crack patterns and failure modes had shown and discussed. Through the experimental results obtained from this research, it was found that increasing the layer of RPC will increase ultimate loads (Pu) and give a stiffer load-deflection demeanor. Utilizing RPC for compression was found more effective than applying RPC in tension Where the increase in the ultimate loads of beams containing the RPC in the compression zone and the container on one and two openings, was higher than the ultimate loads of the corresponding beams with normal concrete by (33%,22% respectively )while the increase was In the ultimate loads of beams that contain the RPC in the tensile zone and the container on one and two openings, higher than the ultimate loads of the corresponding beams of normal concrete by (15.15%, 7.4% respectively) and less than the beams that contain RPC in the compressive zone. However, hybrid beams that applied RPC in tension zone had failed to fewer cracks than hybrid beams that applied RPC in compression. The above shows how effectively RPC works in the tension zone to increase the serviceability (controlling cracks) and durability (protecting steel reinforcement) of beams. The increase in the ultimate loads of the beams containing the RPC in the compression and tension zone and the container on one and two openings, was higher than the ultimate loads of the corresponding beams with normal concrete by (36.36%,29.6% respectively). there is generally a good correlation between experimental results for ultimate loads and load-deflection conduct and the outcomes of nonlinear finite element analysis (FEM) performed by the ABAQUS program.
Keywords:
:Reactive Powder Composite, Layers, Openings, Cracks, Hybrid, ultimate loads, ABAQUS
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