| The purpose of this investigation was to study the effect of using high-strength concrete on shear strength of reinforced and prestressed concrete beams, and to compare test results with the current design code provisions. A total of 53 beams was tested in two main groups.; In the first group, nineteen rectangular reinforced concrete beams were tested. The effects of concrete strength, longitudinal reinforcement ratio, shear span-to-depth ratio, and amount of shear reinforcement on shear strength were studied. In the second group, thirty-four prestressed concrete beams were tested. The same parameters were studied, and in addition the influence of varying the amount of prestress force and the prestressed steel ratio was investigated.; Code provisions for shear were critically examined, and a unified procedure for shear design of both reinforced and prestressed beams was suggested. |
