Reference Type: Journal Article Record Number: 1 Author: Tantely, J. S. and He, Z. Year: 2019 Title: COLLAPSE SAFETY MARGIN-BASED DESIGN OPTIMIZATION OF STEEL STRUCTURES WITH CONCENTRICALLY BRACED FRAMES Journal: Advanced Steel Construction Volume: 15 Issue: 2 Pages: 137-144 Date: Jun Type of Article: Article Short Title: COLLAPSE SAFETY MARGIN-BASED DESIGN OPTIMIZATION OF STEEL STRUCTURES WITH CONCENTRICALLY BRACED FRAMES Alternate Journal: Adv. Steel Constr. ISSN: 1816-112X DOI: 10.18057/ijasc.2019.15.2.3 Accession Number: WOS:000469776700003 Keywords: Steel structures Brace frames Collapse safety Probabilistic analysis Multi-element removal Safety index pushover analysis buildings element ratio Construction & Building Technology Engineering Materials Science Abstract: Finding an optimum design based on collapse safety assessment for bracing systems in steel structures can result in a safer and economical design, and therefore is highly desirable. Several works in the literature have successfully applied various design methodologies for braced frames. The occurrence of unforeseen events outside the scope of these designs might jeopardize their structural integrity. Therefore, tools such as incremental dynamic analysis and modal pushover analysis have been developed to assess the probability of structural collapse. However, their implementation in the design process is challenging because their procedures are onerous and time-consuming. To overcome this issue, a straightforward method utilizing empirical equation to estimate the collapse margin of the structure is used. The proposed methodology uses the brace locations and sections as variables. A probabilistic analysis using multi-element removal identifies the bracing layouts, and explicit equations determine their optimal discrete sections. The methodology creates all the possible schemes, then identifies the optimal one that has the highest safety index based on a targeted collapse margin ratio. Through solving four typical examples of steel framed structures, the practicality, and accuracy of the proposed approach are proved. Copyright (c) 2019 by The Hong Kong Institute of Steel Construction. All rights reserved. Notes: ISI Document Delivery No.: IA7ZL Times Cited: 0 Cited Reference Count: 37 Tantely, Jeriniaina Sitraka He, Zheng National Natural Science Foundation of China [51878123] The research reported in this paper was financially supported by the National Natural Science Foundation of China (Grant No. 51878123). 0 Hong kong inst steel construction Hunghom kowloon URL: ://WOS:000469776700003 Author Address: [Tantely, Jeriniaina Sitraka; He, Zheng] Dalian Univ Technol, Dept Civil Engn, Dalian, Liaoning, Peoples R China. [He, Zheng] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Liaoning, Peoples R China. He, Z (reprint author), Dalian Univ Technol, Dept Civil Engn, Dalian, Liaoning, Peoples R China.; He, Z (reprint author), Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Liaoning, Peoples R China. hezheng@dlut.edu.cn Language: English