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http://dx.doi.org/10.12989/sem.2014.50.1.001

Response modification factor of the frames braced with reduced yielding segment BRB  

Fanaie, Nader (Department of Civil Engineering, K.N.Toosi University of Technology)
Dizaj, Ebrahim Afsar (Department of Civil Engineering, K.N.Toosi University of Technology)
Publication Information
Structural Engineering and Mechanics / v.50, no.1, 2014 , pp. 1-17 More about this Journal
Abstract
In this paper, overstrength, ductility and response modification factors are calculated for frames braced with a different type of buckling restrained braces, called reduced yielding segment BRB (Buckling Restrained Brace) in which the length of its yielding part is reduced and placed in one end of the brace element in comparison with conventional BRBs. Forthermore, these factors are calculated for ordinary BRBF and the results are compared. In this regard incremental dynamic analysis (IDA) method is used for studying 17 records of the most known earthquakes happened in the world. To do that, the considered buildings have different stories and two bracing configurations: diagonal and inverted V chevron, the most ordinary configurations of BRBFs. Static pushover analysis, nonlinear incremental dynamic analysis and linear dynamic analysis have been performed using OpenSees software. Considering the results, it can be seen that, overstrength, ductility and response modification factors of this type of BRBF(Buckling Restrained Braced Frame) is greater than those of conventional types and it shows better seismic performance and also eliminates some of conventional BRBF's disadvantages such as low post-yield stiffness.
Keywords
response modification factor; ductility factor; overstrength factor; reduced length BRB; IDA;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 BHRC (2005), Iranian code of practice for seismic resistant design of buildings, Standard No. 2800, 3rd Edition, Building and Housing Research Center.
2 Abdollahzadeh, Gh. and Banihashemi, M.R. (2013), "Response modification factor of dual moment-resistant frame with buckling restrained brace (BRB)", Steel Compos. Struct., 14(6), 621-636.   DOI
3 Asgarian, B. and Shokrgozar, H.R. (2009), "BRBF response modification factor", J. Construct. Steel Res., 65, 290-298.   DOI   ScienceOn
4 ATC (1995), A critical review of current approaches to earthquake-Resistant design, ATC-34, Applied Technology Council, Redwood City, CA.
5 ATC (1995), Structural response modification factors, ATC-19, Applied Technology Council, Redwood City, CA.
6 ATC (1978), Tentative provisions for the development of seismic regulations for buildings, ATC-3-06, Applied Technology Council, Redwood City, CA.
7 Kim, J. and Choi, H. (2004), "Response modification factors of chevron-braced frames", J. Eng. Struct., 27, 285-300.
8 Mazzoni, S., McKenna, F., Scott, M.H., Fenves, G.L. and Jeremic, B. (2007), Opensees Command Language Manual.
9 MHUD (2006), Iranian National Building Code, Part 10, steel structure design, Ministry of Housing and Urban Development, Tehran, Iran.
10 Mwafy, A.M. and Elnashai, A.S. (2002), "Calibration of force reduction factors of RC buildings", J. Earthq. Eng., 6(22), 239-73.
11 Razavi, S.A., Shemshadian, M.E., Mirghaderi, S.R. and Ahlehagh, S. (2011), "Seismic design of buckling restrained braced frames with reduced core length", SEWC Structural Engineering World Congress, Como, April.
12 Seismic Provisions for Structural Steel Buildings (2005), Approved by the AISC Committee on Specifications and issued by the AISC Board of Directors.
13 Shemshadian, M.E., Razavi, S.A., Hosseini, A., Mirghaderi, S.R. and Khanmohammdi, M. (2011a), "An analytical study of low cycle fatigue effects in buckling restrained braces", 3rd ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Eds. Papadrakakis, M. and Fragiadakis, V., Corfu, Greece.
14 Shemshadian, M.E., Razavi, S.A., Mirghaderi, S.R., Hosseini, A. and Khanmohammdi, M. (2011b), "The advantages of reducing the length of yielding segment in seismic performance of buckling restrained braced frames", Sixth International Conference of Seismology and Earthquake Engineering.
15 Uang, C.M. (1991), "Establishing R (or Rw) and Cd factor for building seismic provision", J. Struct. Eng., 117(1), 19-28.   DOI
16 Vamvatsikos, D. and Cornell, C.A. (2002), "Incremental dynamic analysis", Earthq. Eng. Struct. Dyn., 31(3), 491-514.   DOI   ScienceOn
17 Prinz, G.S. (2010), "Using buckling-restrained braces in eccentric configurations", Ph.D. Dissertation, Department of Civil and Environmental Engineering Brigham Young University.