ACT Column은 기존 CFT 기둥보다 얇은 강판으로도 동일한 구조적 성능을 발휘할 수 있으며, 콘크리트의 구속효과와 강관의 항복 후 좌굴응력의 향상을 기대할 수 있다. ACT Column은 보-기둥 접합부에 외다이아프램을 사용한 접합상세가 적용된다. 그러나 ACT Column 외부에 콘크리트가 피복되는 SRC 타입에서는 외다이아프램을 사용한 접합부의 적용이 난해하다. 그래서 ACT Column의 외부에 수직 스티프너와 수평 스티프너를 사용한 접합상세를 제안하였다. 본 논문에서는 제안상세를 대상으로 단순인장실험을 통해 성능검증을 수행하였다. 실험체는 현장에 사용량이 많은 크기의 ACT Column 으로 2개의 실험체를 제작하였다. 보 플랜지와 보 플랜지의 양측부에 부착된 윙플레이트를 통해 보 플랜지의 단면 내력이 링다이아프램으로 전달되는 명확한 응력전달매커니즘을 나타내었으며, 보 플랜지 전단면이 소성화되어 파괴되었다. 윙플레이트의 크기가 클수록 하중전달량이 증가하였으며, 제안한 접합상세의 강도평가식을 제시하였다.

In this study the structural performance of new composite column to composite beam connection was evaluated by cyclic tests. It is designed to be applied to various types of through type system to the bottom plate to view synthesis composite beam. A composite column is composed of a RC type column reinforced by steel angles which the end bends in each edge corners of column. also, A composite beam is composed of trussed type’s web, a bottom steel plate and reinforced by steel angles which the end bends in each edge corners of beam. 4 cyclic tests of the clarified structural performance of the connections are performed. All specimens that is apply reinforced concrete beam-column joints based on KBC2009 criteria was performed by cyclic test of column to beam. All specimens were exposed to be satisfied with the required ultimate strength.

The Composite structures such as CFT(Concrete Filled Steel Tube) have many advantages compared to the H shape columns, concrete columns. But, CFT columns were reinforced difficult which was members with closed section. When beams size were different around the columns in buildings of various form, the construction was complex that diaphragm was overlapped or inclined. In this study, structural performance comparison of horizontal diaphragm and vertical plates was conducted.

The purpose of this study is to deliberate on design application for a structure of beam with partially restrained composite connection to CFT column. It was intended to apply an economic and stable component by adjusting stiffness ratio of column connection through partially restrained composite connection. As a result of the review of stability of the structure, it was confirmed that in case of a low-rise building as a moment frame, it could be resisted without brace, as stiffness was increased when taking advantage of partial restrained composite connection by composite action.

본 연구에서는 기존의 고력볼트의 축부절삭 가공방법을 이용한 신형상 메카니컬패스너를 개발하였다. 개발된 신형상 메카니컬패스너를 엔드플레이트 형식의 보-기둥 접합부에 적용하여 변형능력 및 강도특성에 대한 재하실험 및 유한요소법에 의한 수치해석을 수행하였다.

The purpose of this study was to experimentally evaluate seismic performance of connection of modular system. As a result of experiment study, two specimens did not show the strength reduction and brittle fracture at connection until 2% story drift. Thus, requirements for intermediate moment frame(IMF) was satisfied in two specimens.

In this study, an experimental study to investigate the load transfer behavior of the CFT column to steel beam connection was carried out. The load transfer mechanism and the effect of the load transfer length were examined, and the results were also compared with finite element analysis results. Finally, the results are to be used for the basic reference of the design guideline for the CFT column connection.

In this paper, a moment resisting precast concrete beam-to-column connection is proposed for high seismic zones using bolt type connection. An experimental study was carried out to investigate the behavior of the proposed connection subjected to cyclic loading