BALANCED FAILURE STRENGTH OF PRECAST INTERIOR BEAM-COLUMN JOINT POST-TENSIONED BY UNBONDED TENDONS WITH OPENING

A method to calculate the balanced failure strength of unbonded PC interior beam-column joints by adding the effects of unbonding and openings to the theoretical equation for RC interior beam-column joints was proposed and its compatibility with the experimental results was verified. The prestress was considered to be an external force for the beam-column joint, and the tensile stress of the PC steel was assumed not to be generated on the hypothetical cross section, and the voids caused by the openings are assumed to be numerous small openings evenly distributed throughout the hypothetical cross section.