Nonlinear Seismic Behaviour Of Experimentally
Identified Stiffness And Damping Characteristics
Of Cold Formed Steel Infill Frames
Author(s)
N. Bourahla, B. El-Djouzi & N. Allal
Abstract
This paper evaluates the effect of wall panels, made of cold formed steel with
sheathing on both sides used as infill, on the seismic behaviour of steel frames in
terms of the overall additional stiffness and damping capacity. For this purpose,
a series of ambient vibration testing was first carried out on a bare steel skeleton
and then on a fully finished five-storey building. Based on the global
characteristics of the panels, which were identified by experimental matching, a
finite element modeling was made to reproduce the behaviour of the entire
structure. The numerical model of the structure was subjected to a ground
acceleration time histories recorded in the region during the Boumerdes 2003
earthquake. By using this procedure, inadequacies in the FE modeling are
highlighted and suggestions are made for better modelling practice for similar
structures. The results obtained elucidate some aspects of the stiffening and
energy dissipating capacity role of the infill panels.
Keywords: cold formed steel, infill frame, earthquake response, ambient
vibration, modeling technique, energy dissipation capacity.
1 Introduction
Cold-formed steel members and components have been produced and widely
used as structural elements for building in many places around the world for at
least three decades of the century. Modern design specifications have taken
substantial steps in providing design analysis methodology, but these are
Keywords
cold formed steel, infill frame, earthquake response, ambient
vibration, modeling technique, energy dissipation capacity
Related Book
Other papers in this volume
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