Effects of Beam Span on Seismic Responses of Braced Frames
Date Issued
2011
Date
2011
Author(s)
Vu Minh, Truong
Abstract
Buckling-restrained braced frames (BRBFs) and Self-centering braced frames (SCBFs) exhibit their benefits in seismic responses due to no buckling and self-centering properties, respectively. In addition, another factor affecting the seismic responses of braced frames might be beam span. The BRBF and SCBF with 5-m and 10-m beam span were investigated in this study. Nonlinear dynamic analyses were performed for all braced frames using ten earthquake ground motions under design-based earthquake (DBE) and maximum-considered earthquake (MCE) levels. The mean values of responses of each pair of 5-m and 10-m beam span braced frames were compared. The results demonstrated significant improvements in reducing residual story drift and increasing elastic stage of beams in BRBF and SCBF using bigger beam span. The smaller beam span reduces the inter-story drift of BRBF. Additionally, beam span does not affect much on the advantages of SCBF compared to BRBF and on the energy in braced frames.
Subjects
Buckling-restrained braced frame
Self-centering braced frame
nonlinear dynamic analysis
residual drift
inter-story drift
Type
thesis
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