Determination of Optimum Configurations for Steel-Braced Frames with Segmental Elastic Spines
Publication: Journal of Structural Engineering
Volume 145, Issue 11
Abstract
A simplified analysis method is proposed to predict the response of segmental elastic spine–braced frames (SESBFs) and select the appropriate truss-segment configuration for a given frame. The method relies on a simplified structure model that can reproduce both the elastic flexural response and inelastic shear response of the braced-frame system. The proposed simplified model is described, and a flowchart is presented to illustrate the steps leading to the frame properties required to achieve the optimum seismic drift response for a given truss-segment configuration. In the design, the process is repeated for different potential truss-segment configurations, and their seismic responses are compared to select a suitable configuration for the structure. The application of the proposed procedure is illustrated for a 24-story building structure located in Vancouver, British Columbia, Canada. Five different truss-segment arrangements were investigated, and two configurations were identified as appropriate for the structure. Final design of the four most promising candidates was performed to confirm the findings from the preliminary design, and the comparison confirmed that the proposed method and simplified analysis model are suitable tools for the preliminary design of SESBFs.
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Acknowledgments
This project was funded by the Natural Sciences and Engineering Research Council of Canada and the Fonds de recherche Nature et technologies (FRQNT) of the Government of Québec.
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Information
Published In
Journal of Structural Engineering
Volume 145 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 8, 2018
Accepted: Mar 2, 2019
Published online: Sep 12, 2019
Published in print: Nov 1, 2019
Discussion open until: Feb 12, 2020
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