CYCLIC LOAD TESTING OF TWO REFINED REINFORCED CONCRETE BEAM-COLUMN JOINTS.

Abstract

The paper describes the testing of two reinforced concrete beam-column joint units tested under incremented-static cyclic loading. The full size test units were based upon an interior beam-column joint of a four-story framed building designed to the current New Zealand loading code and represent refinements on two previously tested conventional joints of similar dimensions. One unit differed from common practice by having a post-tensioned beam stressed to balance the floor dead load of the prototype structure while the second unit was detailed with haunched beams. Hinge formation occurred in the beams and stable hysteretic behavior was obtained up to displacement ductilities of 10 for the prestressed unit and 6 for the haunched unit.