비정형 곡면 콘크리트 및 시멘트 복합체 가새 시스템 적용 빌딩 내진설계 및 평가

Abstract

In this study, an atypical bracing system was proposed in place of the shear wall, which is a concrete structure member of a building. This emphasizes openness and visual freedom. Based on the strut-tie shape design method, the main stress flow direction generated inside the shear wall was confirmed. An amorphous brace shape was designed based on the main stress flow direction, and a member design was carried out. It was designed by dividing it into tension and compression based on the member force of each member. This enabled a detailed design of irregular non-definite members. In addition, when applying ultra-high-performance concrete, the member could be elongated due to the influence of high compressive strength. In the case of Design 1, a circular shape that can emphasize the curve of the amorphous member was placed in the center. It is a design that emphasizes openness and lighting. Design 2 was designed by regularly arranging triangles and squares. Design 3 was designed with the intention of a tree shape. This ignored some of the main stress flows. The resistance performance of the designed amorphous bracing system unit against the lateral force was evaluated. When applying UHPFRC, it showed sufficient performance despite the elongated member. An amorphous bracing system was applied to a two-story frame and a three-story non-earthquake structure. Applicability was evaluated by evaluating lateral resistance performance and seismic performance. As a result, it was determined that designs 1 and 2 designed based on the main stress flow direction were suitable as structural members to replace the wall by securing performance equal to or higher than that of the wall. In particular, in the case of an amorphous bracing system to which ultra-high performance concrete was applied, the initial rigidity was low, but the ductility was improved. When Design 3 was applied, it showed higher performance than the non-reinforcing frame, but significantly lower performance than the shear wall, and it was determined that it was unsuitable as a structural member instead of the wall.