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Evaluation of the Second Order Analysis of Asymmetric Unbraced Frame by using Load Amplification Factor  

Kim, Hee-Dong (현대제철)
Publication Information
Journal of Korean Society of Steel Construction / v.22, no.1, 2010 , pp. 87-97 More about this Journal
Abstract
The purpose of this study was to evaluate the validity of the second-order analysis for asymmetric unbraced frame using the load amplification factor suggested by design codes. For this purpose, the first-order analysis with the B1 and B2 factors suggested by KBC 2005 and the direct analysis with the load amplification factors suggested by KBC 2009 were performed for five story - two bay and five story - four bay asymmetric unbraced steel frames. The results of the analyses were compared with the results of the second-order inelastic analysis to evaluate the validity of the suggested methods. The main parameters of the analysis were the shape of the frame, the axial load ratio of the column, the methods of analysis and the location of column. The research results show that the asymmetric shape of the frame deteriorates the validity of the factor B2 and the suggested methods. The range of error is increased in case of irregular or inclined column.
Keywords
load amplification factor; Asymmetic; unbraced frame; second order analysis; direct analysis method; factor B2;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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