196. finite element modeling and validation of steel sheathed cold-formed steel framed shear walls
Name: Amanpreet Singh
Grad Year: 2022
The objective of this paper is to present an efficient truss-element based finite element model developed in OpenSees of a steel sheathed cold-formed steel framed shear wall system. Steel sheathed specimens show shear buckling of sheathing as tension field develops. This inelastic behavior of the shear walls is replicated by using Pinching04 material for truss elements acting along the tension field. The model employs beam-column elements for framing, rotational springs for representing frame stiffness and vertical springs for modelling hold-downs. The wall models were calibrated using experimental data vailable for 0.030-in. and 0.033-in. steel sheet sheathed shear walls with 2:1 and 4:1 aspect ratios and 6-in., 4-in. and 2-in. fastener spacing at panel edges, reverse cyclically tested using CUREE protocol. The model was able to accurately predict the shear strength and hysteretic response of the shear walls and has the potential to be an important building block tool towards modeling full structures using cold-formed steel framing.
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