쉬어탭 공유 접합부를 갖는 비내진중심가새골조의 내진거동 = Seismic Behavior of Non-Seismic Concentrically Braced Frames with Shared Shear tab

국문 초록 (Abstract)

특수중심가새골조(Special Concentrically Braced Frames)는 우수한 경제성, 비탄성 변형 능력, 연성 등의 이점 때문에 횡하중 저항 시스템으로써 다양한 구조물에 적용하고 있다. 이러한 이점으로 국내 외 연구진의 특수중심가새골조에 대한 연구가 지속적으로 진행되어 설계법과 기준이 비약적으로 발전한 반면에, 과거에 설계된 중심가새골조의 내진 성능에 대한 연구는 미약하다. 특히, 1988년 이전에 설계된 중심가새골조는 현재 기준과 비교하여 상대적으로 적은 설계요구를 반영하였기 때문에 내진 거동에 대한 평가가 시급한 실정이다. 본 연구에서는 이러한 중심가새골조를 비내진중심가새골조(Non-Seismic Concentrically Braced Frames)라 칭하고, 워싱턴대학교에서 실시된 사례 조사를 토대로 비내진중심가새골조의 대표적인 접합부인 쉬어탭 공유 용접접합부를 갖는 골조의 내진 거동에 대한 유한요소모델을 제시하고 검증하였다. 이 모델을 이용하여 특수중심가새골조와 대비되는 비내진중심가새골조의 연성 능력, 강도, 비탄성 변형 능력에 대해 규명하여 내진 성능을 평가하였다.

다국어 초록 (Multilingual Abstract)

Special concentrically braced frames(SCBFs) have distinctive advantages in considerable seismic performance, which make engineers widely use SCBFs as lateral-load resisting systems in buildings and have researchers to develop SCBFs design methods. Compared to the extensive research of SCBF, comparatively little information is currently available on the performance of SCBFs designed and constructed before the early 1990's. Prior to 1988, concentrically braced frames(CBFs) design requirements were substantially less restrictive. As a result, many existing structures designed to these requirements may not ensure ductility and pose a significant concern in current buildings. In this study, these older frames are referred as non-seismic braced frames(NCBFs). In order to investigate the seismic behavior of NCBFs, finite-element(FE) models of SCBF and NCBF were suggested and verified using case investigation of NCBF conducted on the University of Washington. Using these models, the seismic behavior of NCBF with shared welding shear tab, which is the representative of the types of connections, was established and compared with the seismic performance of SCBF.

참고문헌 (Reference)

1 유정한, "중앙부 거셋플레이트의 다층 X-형 가새골조 거동에 미치는 영향" 한국강구조학회 25 (25): 176-186, 2013

2 대한건축학회, "건축구조설계기준 및 해설(KBC 2009)"

3 Sloat, D. A., "Survey and Testing of Pre-1988 Braced Frame Structures From The West Coast of the United States" 2013

4 AISC, "Steel Construction Manual 14 th Edition" American Institute of Steel Construction 2010-, 2010

5 AISC, "Seismic Design Manual" American Institute of Steel Construction 2010

6 SAC Steel Project, "Protocol for Fabrication, Inspection, Testing and Documentation of Beam-Column Connection Testing and Other Experiments" SAC Joint Venture 1997

7 Shawn, M. J., "Improved Seismic Performance of Special Concentrically Braced Frames" Department of Civil Engineering, University of Washington, Seattle 2005

8 ATC 24, "Guidelines for Cyclic Seismic Testing of Components of Steel Structures"

9 Sloat, D. A., "Evaluation and Retrofit of Non-Capacity Designed Braced Frames" Department of Civil Engineering, University of Washington 2014

10 Liu, J., "Cyclic Testing of Simple Connections Including Effects of the Slab" 126 (126): 32-39, 2000

11 Yoo, J. H., "Analytical Performance Simulation of Special Concentrically Braced Frames" 134 (134): 881-889, 2007

12 ANSYS, "ANSYS multiphysics Version14.5" ANSYS Inc. 2013

13 Roeder, C. W., "A Balanced Design Procedure for Special Concentrically Braced Frame Connections" 67 (67): 1760-1772, 2011