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Lateral Stiffness of Steel Moment Frames Having Dogbone Seismic Connection  

이철호 (경남대학교 건축학부)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.15, no.4, 2002 , pp. 639-647 More about this Journal
Abstract
A simplified analytical procedure is presented to estimate the reduction of elastic lateral stiffness of steel moment frames arising from the radius-cut dogbone weakening. With the original radius-cut dogbone shape, it is almost impossible or too complicated to integrate analytically the mathematical expressions encountered when applying the conjugate beam method to compute the beam deflection component. In this study, the problem is circumvented by replacing the original radius-cut dogbone with an equivalent dogbone of constant width. The equivalence between the two is established by imposing an equal dogbone elongation criterion. This approach is justified by using a calibrated finite clement analysis. Then, the elastic lateral deflection components from the column, panel zone, and beam are derived for a typical beam-column subassembly. The derived results can be used to evaluate the reduction of the frame lateral stiffness. Case studies conducted within some practical ranges of frame configurations show that the reduction in frame lateral stiffness due to the presence of dogbone cut is on the order of 1 to 2 percent and is reasonably negligible in practical sense.
Keywords
steel moment frame; dogbone(RBS) connection; lateral stiffness; story drift;
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1 이철호, '패널존 변형을 포함한 철골모멘트골조의 탄성층간변위 근사해석,' 한국강구조학회논문집 제8권, 제4호, 1996, pp.105-113
2 Bruneau, M., Uang, C. M., and Whittaker, A., Ductile Design of Steel Structures, McGraw- Hill, New York, NY, 1998
3 RIST강구조연구소/현대건설기술연구소, '고성능 내진 용접 철골모멘트접합부 개발 연구보고서,' RIST 강구조연구소/현대건설기술연구소, 2002
4 Chen, S. J., Yeh, C. H., and Chu, J. M., 'Ductile Steel Beam-to-Column Connections for Seismic Resistance,' ASCE Structural Journal, Vol. 122, No. 11, 1996, pp. 1292-1299   DOI   ScienceOn
5 Iwankiw, N., 'Ultimate Strength Considerations for Seismic Design of the Reduced Beam Section(Internal Plastic Hinge),' Engineering Journal/First Quarter, AISC, 1997, pp.3-16
6 SAC, 'Seismic Design Criteria for New Moment-Resisting Steel Frame Construction,' Report No. FEMA 350, SAC Joint Venture, Sacramento, CA., 2000
7 ABAQUS, ABAQUS User's Manual, Version 5.8, Hibbit, Karlson & Sorenson, Inc., 1998   DOI
8 Engelhardt, M. D., Winneberger, T., Zekany, A. J., and Potyraj, T. J., 'Experimental Investigations of Dogbone Moment Connections,' Engineering Journal, Fourth Quarter, AISC, 1998, pp.128-139
9 Plumier, A., 'The Dogbone: Back to the Future.'Engineering Journal, AISC, 2nd Quarter, Vol. 34, No. 2, 1997, 1997, pp.61-67
10 Doghri, I., 'Fully Implicit Integration and Consistent Tangent Modulus in Elasto- Plasticity.' International Journal of Numerical Methods in Engineering, Vol. 36, 1993, pp. 3915-3932   DOI   ScienceOn
11 이철호, 전상우, 김진호, 'RBS 철골모멘트접합부의 내진거동평가를 위한 반복재하 실물대 실험,' 한국지진공학회 2002년도 춘계학술발표대회논문집, 2002, pp.306-316
12 Jones, S. L., Fry, G. T., and Engelhardt, M. D., 'Experimental Evaluation of Cyclically Loaded Reduced Beam Section Moment Connections.'Journal of Structural Engineering, ASCE, Vol. 128, No. 4, 2002, pp.441-451   DOI   ScienceOn