Seismic performance of reinforced concrete corner beam-column joint under tri-directional loading

Abstract

Seismic performance of a comer beam-column joint in reinforced concrete frames was studied by testing two three-dimensional beam-column subassemblage specimens without slabs under fri-directional loading. A column-to-beam flexural strength ratio was varied from 1.4 to 2.3 by changing the magnitude of column axial load. Although sufficient redundancy to prevent shear failure was provided to a beam-column joint in the test, all joints failed in flexure after beam and column longitudinal bars yielded. The ultimate flexural capacity of a comer joint under tri-directional loading was enhanced by large column axial load, and can be estimated by the method proposed by Shiohara.