BEAHVIOR OF HEAVY WEIGHT CONCRETE BEAMS REINFORCED WITH CGFRP BARS

Civil Engineering

Concrete is a brittle material that has high compressive strength, but low tensile strength, thus, reinforcement of concrete is required to allow it to handle tensile stresses. The corrosion and rusting issue of steel bars and their propagation especially, inside areas with harsh environmental conditions, are extremely influenced by the safety and performance of the structures. Therefore, scientists are trying to discover new materials close to their properties and even better than reinforcing steel. Finally, they came up with fiber bars. The aim of this research is to study the possibility of replacing steel bars with locally manufactured glass fiber bars incorporating carbon tire material to have some properties of carbon fiber bars and conduct new fiber bars called carbon glass fiber bars and use it to reinforce heavy-weight concrete to avoid severe environmental conditions and reduce the weight of reinforced concrete structures. An experiential program was designed to cover research objectives using normal-weight concrete beams and heavy-weight concrete beams with dimensions 120*250*2000 mms. Normal and heavy-weight concrete beams were reinforced with steel bars and steel stirrups and compared with the same concrete beams but reinforced with carbon glass fiber bars and steel stirrups. The cracking loads, ultimate loads, and behavior of crack propagation, in addition to the presence of curves illustrating load-deflection, load-strain of reinforcing bars, and load-strain of concretes. The results of the present paper indicated that the use of C. GFRP with heavy-weight concrete and normal-weight concrete is very effective and will achieve structural safety and reduce the overall cost.

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