Abstract
The aim of this research is to investigate the effect of ratio of longitudinal beam reinforcement in the joints under cyclic loading. As the measure of evaluation, the hysteretic diagram for joint response subjected to a certain cyclic loading pattern has been used. Three 1: 1 scale exterior beam-column joint specimens have been used to represent 3 variations of longitudinal beam reinforcement ratio, which affect the number of joint stirrup required. The test results have been presented in the form of crack pattern, energy dissipation and accumulation for various loading cycles, and hysteretic loop graphs. It is concluded that the ratio of longitudinal reinforcement does not affect the ductility of the beam-column joint, provided that the number of joint stirrup is sufficiently installed. Furthermore, it is also concluded that higher ratio of longitudinal beam reinforcement requires higher number of stirrups to reach a constant cumulative energy dissipation capacity.
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