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Column-Tree 접합부 철골구조물의 연쇄붕괴 저항성능 평가
이업(Li, Ye),노삼영(Noh, Sam-Young),나영수(Na, Young-Soo) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.2
The Column-Tree connection is widely used as a typical beam-column joint in Korea and Japan. However, there has been no studies on the progressive collapse resistance performance of an entire structure using this connection. In this study, a 5bayx8bayx7-story building was used to analyze the progressive collapse resistance performance of the column-tree connection, which was designed as an intermediate moment resisting frame. Subsequently, the one-dimensional column-tree connection model has been developed, which were then used to simulate three-dimensional behavior under column loss while considering the bolt slip effect and sub-assemblage structure model. Finally, energy-based approximate analysis has been used to efficiently evaluate progressive collapse resistance performance. Research findings has proven that the progressive collapse resistance performance of the target building satisfies the acceptance criteria, specified by the current progressive collapse guidelines of the General Services Administration.
나영수(Na, Young-Soo),노삼영(Noh, Sam-Young),이업(Li, Ye) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.9
For the analysis of the progressive collapse resistance performance of a structure, it is recommended to use a 3-D structure model that considers the 3-D effect of the slab, the continuity of the adjacent spans, and the redistribution of stress through the alternated path of the upper stories. Although a structure is modeled with reduced modeling concepts, the large size of the target structure still requires a lot of time on modeling and analysis. In this study, the sub-assemblage structure modeling concept was presented. The area of the sub-assemblage structure was determined by the analysis of the number of affected spans using the stress variation in the members before and after the sudden column removal in the entire structure model. The modeling concept was suggested in three levels according to the degree of the modelled detail of members located in the outer area of the sub-assemblage structure. They are evaluated by comparing the load-displacement relationship, girder stresses and plastic hinging locations with those resulted by the simulation of entire structure model.