Experimental Behavior of Laced Reinforced Concrete Beams under Static Loading

Hayfaa Dhumad Hasan Al-Abboodi, Abass Abdulmajeed Allawi, Chai Hwa Kian

Abstract: This paper provides results of an investigation to study the influence of lacing reinforcement on the flexural performance of reinforced concrete beams under static load. A twelve reinforced concrete beams with and without lacing reinforcement are tested under four points bending loading with displacement control. Three test parameters are used, which are the diameter of lacing bar (4mm, 6mm, and 8mm), inclination angle of lacing bar with longitudinal beam axis (30^, 45^, and 60^), and number of lacing bar in the longitudinal face of the beam (lacing steel ratio). Flexural capacities of laced reinforced concrete (LRC) beams are founded to be more than the reinforced concrete (RC) beams. Flexural capacity of such beam is increased by using large lacing bar diameter, 30^ and 45^angle of inclination lacing bar, and maximum lacing steel ratio, while the deflection decreases.

Keywords: RC beam, laced reinforcement, ductility, crack, static loading