Abstract

The inelastic response of three-story steel concentrically braced frame buildings under wind loads was simulated to determine the applicability of ductile braced frame design to wind load applications. This study examined three types of steel concentrically braced frames: a conventional braced frame, a ductile braced frame, and a ductile braced frame with a reduced beam requirement. Braced frames were designed for four design wind speeds (220 mph, 156 mph, 127 mph, and 110 mph), for a total of nine unique braced frame designs. Nonlinear static pushover analysis was used to determine system overstrength and ductility under wind loads. Eigenvalue vibration analysis was used to determine the building periods of vibration and their mode shapes. Nonlinear dynamic dynamic response history analysis was used to determine the wind collapse margin ratio. Results from the static analysis showed that ductile braced frames exhibited greater overstrength compared to conventional braced frames. Results from the vibration analysis indicated that ductile braced frames were stiffer than the conventional braced frames. Results from the dynamic analysis showed that ductile braced frames exhibited higher collapse velocity pressures compared to conventional braced frames. The findings suggest that ductile braced frames may be a viable design alternative to conventional braced frames subjected to wind loads.

Degree

MS

College and Department

Ira A. Fulton College of Engineering; Civil and Construction Engineering

Rights

https://lib.byu.edu/about/copyright/

Date Submitted

2025-07-30

Document Type

Thesis

Keywords

performance-based wind design, concentric braced frames, conventional design, ductile design

Language

english

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