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On the seismic collapse capacity of optimally designed steel braced frames

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Abstract

The main purpose of this study is to respond to an important question in the field of structural engineering: is the seismic collapse capacity of optimally designed concentrically steel braced frames acceptable or not? The present work includes two phases: performance-based design optimization and seismic collapse safety assessment. In the first phase, three nature-inspired metaheuristic algorithms, namely improved fireworks algorithm, center of mass optimization, and enhanced colliding-bodies optimization are employed to carry out the optimization task. In the second phase, seismic collapse capacity of the optimally designed concentrically steel braced frames is evaluated by performing incremental dynamic analysis and generating fragility curves. Two design examples of 5- and 10-story concentrically steel braced frames with two different topologies of braces are presented. The numerical results indicate that the center of mass optimization algorithm outperforms the other algorithms. However, all of the optimal designs found by all algorithms are of acceptable seismic collapse safety.

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Authors and Affiliations

  1. Department of Civil Engineering, Urmia University, Urmia, Iran

    Saeed Gholizadeh, Aydin Hassanzadeh & Arman Milany

  2. Civil Engineering Department, Faculty of Engineering, Antalya Bilim University, Antalya, Turkey

    Hamid Farrokh Ghatte

Authors
  1. Saeed Gholizadeh
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  2. Aydin Hassanzadeh
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  3. Arman Milany
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  4. Hamid Farrokh Ghatte
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Correspondence to Saeed Gholizadeh.

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Gholizadeh, S., Hassanzadeh, A., Milany, A. et al. On the seismic collapse capacity of optimally designed steel braced frames. Engineering with Computers 38, 985–997 (2022). https://doi.org/10.1007/s00366-020-01096-7

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  • DOI: https://doi.org/10.1007/s00366-020-01096-7

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