Cyclic and monotonic moment-rotation behaviour of CFS web-connected beam-to-column joints

Scientific paper - Original scientific paper

• Author: Ioannis Papargyriou
• Author: Seyed Mohammad Mojtabaei
• Author: Iman Hajirasouliha
• Author: Jurgen Becque
• Author's institution: University of Zagreb; Faculty of Civil Engineering
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract (english)

Over the past decade, the market for cold-formed steel (CFS) systems has significantly expanded,
especially for the construction of low to mid-rise buildings. CFS moment-resisting frame systems
have become popular even in seismic-prone regions, mainly for single-storey portal-framed
buildings of industrial use. However, their application in multi-storey structures is still limited by
the behaviour of the beam-to-column joints, which are prone to premature local buckling failure of
the connected elements. This study aimed to develop a more practical type of moment-resisting
CFS joint, which is fast and easy to assemble, while providing satisfactory seismic performance. In
the proposed connection system, the beam and column elements are built-up from CFS channels
and their webs are bolted to a web through-plate. In a first step, the seismic moment-rotation
behaviour of CFS beam-column joints with various configurations was investigated. Detailed
FE models were developed in ABAQUS, taking into account material nonlinearity and geometric
imperfections, which were validated against available experimental data. The validated FE
models were subsequently used to perform monotonic and cyclic analyses of CFS bolted joints
with different beam slenderness values, and various web through-plate shapes and slenderness
values. The moment-rotation behaviour of the studied joints was then evaluated in terms of its
seismic characteristics, including bending moment capacity, rotational stiffness, ductility, energy
dissipation capacity and damping coefficient. Finally, following comparison of the results, more
structurally efficient CFS bolted joints suitable for multi-storey moment-resisting frame systems
in earthquake regions were proposed.

• Keywords (english): Cold-formed steel (CFS), Bolted moment-resisting connections, FE analysis, Stiffness, Ductility
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Unknown
• Publication version: Published version
• Publication title: 1st Croatian Conference on Earthquake Engineering 1CroCEE
• Numbering: pp. 1067-1077
• p-ISSN: 3043-8071
• DOI: https://doi.org/10.5592/CO/1CroCEE.2021.122
• URN:NBN: urn:nbn:hr:237:030585
• Publication: 2021-03
• Conference: Title: st Croatian Conference on Earthquake Engineering; Location: Zagreb, Croatia; Start date: 2021-03-22; End date: 2021-03-24; Assembly type: Lecture
• Type of resource: Text
• Publisher: Sveučilište u Zagrebu Građevinski fakultet
• Access conditions: Open access
• Created on: 2024-08-30 10:09:40