Seismic Response of Cold Formed Steel Frames Sheathed by Fiber Cement Boards
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In this paper, the seismic performance of cold formed steel shear walls sheathed by fiber cement boards (FCB) is investigated. Of particular interest is the seismic response modification factor of FCB shear walls. Nonlinear incremental dynamic analyses of multi-story cold formed steel framed structures were carried out following an approach adopted by FEMA-P695 on the description of building seismic behavior. Different scaled earthquake records in three different earthquake prone regions located on low, medium and high seismic risk zones in Iran were taken into account. One, two and three story CFS archetype buildings were analyzed using models created in OpenSees software to predict structural performance of the buildings. Nonlinear dynamic time history analyses were carried out employing OpenSees software utilizing 2D models of a FCB braced wall tower. A stick model was created whose behavior was fitted to the lateral resistance versus deformation of each story that braced elements in the model. The elements were defined via material Pinching4 to construct a uniaxial material exhibiting pinched load-deformation response and demonstrate degradation under cyclic loading. The results show that most relevant codes which suggest the value of seismic response modification factor equal to 2 for cold formed steel shear walls sheathed by FCB are acceptable only for up to three story buildings in low seismic risk zone, up to two story in medium seismic zone and one story in high seismic risk zone.
KeywordsCold formed steel Fiber cement boards Response modification factor Nonlinear incremental dynamic analyses Fragility curves
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- 6.IR2800 (2015) Iranian code of practice for seismic resistant design of building, 4th edn. IranGoogle Scholar
- 7.BHRC (2013) Standard of structural design and construction code of cold formed light steel (Structural) no. 612Google Scholar
- 8.FEMA-P695 (2009) Quantification of building seismic performance factors. USA, Washington, D.C.: Applied technology council, ATC-63Google Scholar
- 10.Mazzoni S, McKenna F, Scott MH, Fenves GL. (2006) Opensees command language manual. Pacific Earthquake Engineering Research (PEER) Center, University of California, BerkeleyGoogle Scholar
- 12.AISI (2012) North American Standard for cold-formed steel framing—Lateral design. American Iron and Steel Institute, Washington, D.C.Google Scholar
- 14.Leng J, Schafer B, Buonopane S (2013) Modeling the seismic response of cold-formed steel framed buildings: model development for the CFS-NEES building. In: Proceedings of the Annual Stability Conference-Structural Stability Research Council, St Louis, Missouri: CiteseerGoogle Scholar
- 18.Dorion M-È (2013) HAMBRO D500 composite floor system: description, installation and advantages of the system. In: Building C (ed): Google Patents, Canam Buildings Co., CanadaGoogle Scholar
- 21.Fiorino L, Iuorio O, Landolfo R (2013) Behaviour factor evaluation of sheathed cold-formed steel structures. Adv Steel Constr 9:26–40Google Scholar
- 24.Ibarra L, Medina R, Krawinkler H (2002) Collapse assessment of deteriorating SDOF systems. In: Proceedings of the 12th European Conference on Earthquake Engineering. pp 9–13Google Scholar