Advanced Steel Construction

Vol. 9, No. 1, pp. 26-40 (2013)


BEHAVIOUR FACTOR EVALUATION OF SHEATHED COLD-FORMED STEEL STRUCTURES

 

Luigi Fiorino 1, Ornella Iuorio 2,* and Raffaele Landolfo 2

1 Department of Structural Engineering, Faculty of Engineering, University of Naples Federico II

2 Department of Constructions and Mathematical Methods in Architecture, Faculty of Architecture, University of Naples Federico II, Naples, Italy

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 

Received: 3 November 2011; Revised: 25 June 2012; Accepted: 29 June 2012

DOI:10.18057/IJASC.2013.9.1.3

 

ABSTRACT:

The seismic behaviour of sheathed cold-formed steel (SCFS) structures is characterized by the lateral response of shear walls. Basically, if cold-formed steel (CFS) structures are designed according to the sheathing-design” methodology, then the seismic behavior of shear walls is strongly influenced by the sheathing-to-frame connections response, characterized by a remarkable nonlinear response and a strong pinching of hysteresis loops. In this paper the results of an extensive parametric non linear dynamic analysis, carried out on one story buildings by means of incremental dynamic analysis (IDA), using an ad hoc model of the hysteresis response of SCFS shear walls, are presented. An extended number of wall configurations has been considered investigating several parameters such as sheathing panel typology, wall geometry, external screw spacing, seismic weight and soil type. Based on IDA results, three behavior factors have been defined, which take into account overstrength, ductility and both overstrength and ductility, respectively.

 

Keywords:Behavior factor, Cold formed steel, Parametric study, Seismic design, Sheathing-Braced structures, Seismic dynamic analysis, Seismic force modification factor

 

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