Strength Degeneration of SRUHSC Column to RC Beam Joint Subjected to Reversal Cycle Load

Abstract

In order to investigate the strength degeneration of SRUHSC column to RC beam joint subjected to reversal cycle load, six interior joint specimens were designed basing on half-scale model of prototype joint used in high-rise buildings. A reversal cycle loading test was carried out and test parameters included various axial load ratio and volumetric stirrup ratio. Strength degeneration of SRUHSC column to RC beam joint was described. A discussion on relations between λj and applied axial load ratio or volumetric stirrup ratio was presented. It was found that strength of all the joints degenerated in every displacement and degenerated more quickly with the increment of displacement during the reversal cycle loading, and that the strength of all the joints degenerated fast with the increment of applied axial load ratio and slowly with the increment of volumetric stirrup ratio. The experimental results indicated that test parameters had obvious influence on the strength degeneration of SRUHSC column to RC beam joint subjected to reversal cycle load.