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Title: Structural performance of cold-formed steel column bases with bolted moment connections
Authors: Chung, KF 
Yu, WK
Wang, AJ
Keywords: Bolted moment connections
Column bases
Finite element modelling
Section failure under combined bending and shear
Issue Date: 2005
Publisher: Techno Press
Source: Steel and composite structures, 2005, v. 5, no. 4, p. 289-304 How to cite?
Journal: Steel and composite structures 
Abstract: This paper presents a thorough investigation into the structural performance of cold-formed steel column bases using double lipped C sections with bolted moment connections. A total of four column base tests with different connection configurations were carried out, and it was found that section failure under combined bending and shear was always critical. Moreover, the proposed column bases were demonstrated to be structurally efficient attaining moment resistances close to those of the connected sections. In order to examine the structural behaviour of the column base connections, a finite element model was established using shell and spring elements to model the sections and the bolted fastenings respectively. Both material and geometrical non-linearities were incorporated, and comparison between the test and the numerical results was presented in details. The design rules originally developed for bolted moment connections between lapped Z sections were adopted and re-formulated for the design of column base connections after careful calibration against the test data. Comparison on co-existing moments and shear forces at the critical cross-sections of the column bases was fully presented. It was shown that the proposed design and analysis method was structurally adequate to predict the failure loads under combined bending and shear for column bases with similar connection configurations.
ISSN: 1229-9367
EISSN: 1598-6233
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