TEST OF AN INNOVATIVE REINFORCING DETAIL FOR R/C INTERIOR BEAM-COLUMN CONNECTIONS SUBJECTED TO SEISMIC ACTION

摘要

Two half scale reinforced concrete interior beam-column joints were tested under statically cyclic lateral load. They were designed such that joint shear failure would occur by increasing the number and size of beam bars passing through the joint. The beam-column joint reinforced with a new detail showed lateral story shear resistance 28% larger than that of the other joint with no special joint reinforcing detail. The new detail was effective to enhance the story shear capacity and joint shear stiffness as well as to alter the failure mode from joint shear failure to beam yielding which is favorable for earthquake resistant design of moment resisting frames.