LIMIT ANALYSIS OF RC INTERIOR BEAM-COLUMN JOINTS USINGSINKING MECHANISM OF CONNECTING BEAMS

摘要

A new model to estimate the strength of reinforced concrete ( referred to as RC hereafter ) interior beamcolumnjoints is proposed using sinking mechanism of connecting beams. The strength of joints is estimatedby the forces at the beam end sections connecting with the joints, where stress of compressive strut at beamends is assumed to be equal to the stress of strut in joint, neglecting the effect of bond . The efficiency ofthe model was examined by analyzing 84 specimens in the literature. The results show that the proposedmethod overestimate by about 10% the strength of joints, however the standard deviations are very small. Itis also shown that the estimation of J type failure specimens with single-layered reinforcement is good but notso good of ones with double-layered reinforcement. The error may come from the estimation of bond strength.The study in the paper as a whole shows the efficiency of the proposed method.