Research Spotlight: Numerical Study on the Behavior and Design of Screw Connected Built-up CFS Chord Studs

2017 Annual Stability Conference Presentation

Session SS1A – Technical Presentations: Stability of Thin-Walled Components and Assemblages
Tuesday, March 21, 2017
1:40 pm

Numerical Study on the Behavior and Design of Screw Connected Built-up CFS Chord Studs

This study presents the development and validation of a finite element modeling protocol in ABAQUS for screw connected, back-to-back built-up cold-formed steel (CFS) columns using results from experiments conducted at Johns Hopkins University. The goal is to examine the buckling, peak, and post-peak behavior (with an example shown in the figure) of built-up CFS columns of different cross section sizes and sheathing conditions, and under monotonic loading to improve existing built-up CFS column design guidelines so that all relevant failure modes are considered. Ongoing working includes cyclic collapse analyses, the characterization of chord stud buckling limit states, and a framework to implement these limit states in seismic simulations of CFS-framed shear walls.

Smail Kechidi and Nouredine Bourahla, University of Blida 1, Blida, Algeria; David C. Fratamico and Benjamin W. Schafer, Johns Hopkins University, Baltimore, MD; José Miguel Castro, University of Porto, Porto, Portugal