PRELIMINARY EXPERIMENTAL RESEARCH ON THE FEASIBILITY OF POURING R.C. FRAME JOINTS WITH THE SAME STRENGTH CONCRETE AS BEAMS

It has been a practical construction scheme to make column beam joints poured with the same strength concrete as beams. Three groups spacial column beam joints, which included 2 interior joints, 2 exterior joints, and 2 corner joints, which only joint concrete strength different in each group, are tested under cyclic loading. The failure pattern, bearing capacity, dissipative capacity and the displacement ductility parameter were investigated. The test results shown that, on the one hand, it is fesible to pour the joint with the same strength concrete as beams, on the other hand, it is necessary to check the axial compression and shear capacity of such joints. Finally, the further investigations on this field are prospected.