축하중이 작용하는 철근 콘크리트 경계보-벽체 시스템의 압축성능 평가

Abstract

This study investigated the structural performance of the RC boundary beam–wall system subjected to axial loads that required lesserconstruction quantity and smaller floor height in comparison with the conventional RC transfer girder system. Four specimens of 1/2 scalewere constructed, and their peak strengths under axial loads and failure characteristics were compared and analyzed. Test parameters includedthe ratio of the lower to the upper wall length, lower wall thickness, and stirrup details of the lower wall. In addition, three-dimensionalnonlinear finite element analysis was performed to verify the effectiveness of the boundary beam–wall system. The peak strength of eachspecimen was similar to the nominal axial strength of the lower wall, indicating that the axial load was transferred smoothly from the upper tothe lower wall. The contribution of the lower wall cross-section was high if the ratio of the lower to the upper wall length was small; thecontribution was low if the out-of-plane eccentricity existed in the lower wall. The specimen with smaller stirrup distance and cross-ties in thelower wall showed higher initial stiffness and peak load than other specimens.