슬래브가 있는 고강도 철근 콘크리트 넓은 보-기둥 접합부의 거동

Abstract

An experimental investigation was conducted to study the behavior of high-strength RC wide beam-column joints with slab subjected to reversed cyclic loads under constant axial load. Six half scale interior wide beam-column assemblies representing a portion of a frame subjected to simulated seismic loading were tested, including three specimens without slab and three specimens with slab. The primary variables were compressive strength of concrete(fck=240, 500kgf/cm2), the ratio of the column-to-beam flexural capacity(Mr=∑Mc/∑Mb ; 0.77~2.26), extended length of the column concrete(ld ; 0, 9.6, 30cm), ratio of the column-to-beam width(b/H ; 1.54, 1.67). Test results are shown that (1) the behavior of specimen using high-strength concrete satisfied the required minimum ductile capacity according to increase the compressive strength, (2). In the design of the wide beam-column joints, one should be consider the effects of slab stiffness which is ignored in the current design code and practice.