New Approach to Evaluate the Response Modification Factors for Steel Moment Resisting Frames

다국어 초록 (Multilingual Abstract)

The design force levels currently specified by most seismic codes are calculated by dividing the base shear for elastic response by the response modification factor (R). This is based on the fact that the structures possess significant reserve strength, redundancy, damping and capacity to dissipate energy. This paper proposed the evaluation methodology and procedure of the response modification factors for steel moment resisting frames. The response modification factors are evaluated by multiplying ductility factor (Rμ) for SDOF systems, MDOF modification factor (RM) and strength factor (RS) together. The proposed rules were applied to existing steel moment resisting frames. The nonlinear static pushover analysis was performed to estimate the ductility (Rμ), MDOF modification (RM) and strength factors (RS). The results showed that the response modification factors (R) have different values with various design parameters such as design base shear coefficient (V/W),failure mechanism, framing system and number of stories.

참고문헌 (Reference)

1 ICBO, "Uniform Building Code" 1997

2 ATC, "Tentative Provisions for the Development of Seismic Regulations for buildings" Applied Technology Council 1978

3 ATC, "Structural Response Modification Factors" Applied Technology Council 1995

4 Osteraas, J. D, "Strength and Ductility Considerations in Seismic Design" Stanford University 1990

5 Miranda, E, "Strength Reduction Factors in Performance-based Design" University of California 125-132, 1997

6 Kang, C. K, "Statistical study and evaluation of ductility factors for elastic perfectly plastic SDOF systems in stiff soils" 4 (4): 15-24, 2004

7 AISC, "Seismic provisions for structural steel buildings" American Institute of Steel Construction 2002

8 Maheri, M. R, "Seismic behavior factor, R, for steel X-braced and knee-braced RC buildings" 25 : 1505-1513, 2003

9 Sudhir, K. J, "Seismic Overstrength in Reinforced Concrete Frames" ASCE 121 (121): 580-585, 1995

10 Nassar, A. A, "Seismic Demands of SDOF and MDOF Systems" John A. Blume Earthquake Engineering Center 1991

11 Uang, C. M, "Safety and Economy Considerations of UBC Seismic Force Reduction Factors" 1993

12 Kim, J. K, "Response modification factors of chevron-braced frames" 27 : 285-300, 2005

13 Galíndez, N, "Performance of steel moment-frame buildings designed according to the Colombian code NSR-98" 29 (29): 2274-2281, 2007

14 Balendra T, "Overstrength and ductility factors for steel frames designed according to BS 5950" ASCE 120 : 1019-1035, 2003

15 Freeman, S. A, "On the correlation of code forces to earthquake demands" Applied Technology Council 1990

16 "NEHRP Recommended Provisions for Seismic Regulations for New Buildings and Other Structures"

17 "NEHRP Commentary on the Guidelines for the Rehabilitation of Buildings"

18 "Minimum Design Loads for Buildings and Other Structures"

19 MIDAS/Gen program, "MIDAS/Gen-General structural design system" MIDAS Information Technology 2001

20 ICC, "International Building Code 2000" International Code Council 2000

21 Kang, C. K, "Evaluation of Response Modification Factors for Special Steel Moment Resisting Frames" Kyonggi University 2003

22 Mahmoudi, M, "Evaluating response modification factors of concentrically braced steel frames" 66 (66): 1196-1204, 2010

23 Uang, C. M, "Establishing R(or Rw) and Cd factor for Building Seismic provisions" ASCE 117 (117): 19-28, 1991

24 강철규, "Empirical Estimation of Ductility Factors for Elasto-Plastic SDOF Systems in Alluvium Sites" Korean Society of Steel Construction 533-542, 2002

25 Hwang, H, "Effects of large earthquake on the design of buildings in eastern united states" 1994

26 Whittaker, A. S., "Earthquake Simulation Tests and Associated Studies of a 0.3-Scale Model of Six-story Eccentrically Braced Steel Structures" Earthquake Engineering Research Center 1987

27 Uang, C. M, "Earthquake Simulation Tests and Associated Studies of a 0.3-Scale Model of Six-story Concentrically Braced Steel Structures" Earthquake Engineering Research Center 1986

28 Kang, C. K, "EMPIRICAL EVALUATION OF DUCTILITY FACTORS FOR THE SPECIAL STEEL MOMENT-RESISTING FRAMES IN VIEW OF SOIL CONDITION" Elsevier 19 (19): 551-572, 2010

29 Tsai, K. C, "DRAIN 2D +: A Generalpurpose Computer Program for Static and Dynamic Analyses of Inelastic 2D Structures Supplemented with a Graphic Processor" National Taiwan University 1994

30 Asgarian, B, "BRBF response modification factor" 65 (65): 290-298, 2009

31 Kurban, C. O, "A numerical study on response modification, overstrength, and displacement amplification factors for steel plate shear wall systems" 38 : 497-516, 2009

32 ATC, "A Critical Review of Current Approaches to Earthquake-resistant Design" Applied Technology Council 1995