Optimum energy-based design of BRB frames using nonlinear response history analysis

In this paper, an optimum design method for buckling restrained brace frames subjected to seismic loading is presented. The multi-objective charged system search is developed to optimize costs and damages caused by the earthquake for steel frames. Minimum structural weight and minimum seismic energy...

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Bibliographic Details
Published in:Structural and multidisciplinary optimization 2018-03, Vol.57 (3), p.1005-1019
Main Authors: Rezazadeh, F., Mirghaderi, R., Hosseini, A., Talatahari, S.
Format: Article
Language:English
Subjects:
Bracing
Columns (structural)
Computational Mathematics and Numerical Analysis
Earthquake damage
Earthquake loads
Engineering
Engineering Design
Frame design
Multiple objective analysis
Nonlinear analysis
Nonlinear response
Optimization
Plastic buckling
Research Paper
Seismic energy
Seismic engineering
Steel frames
Steel structures
Structural damage
Structural weight
Theoretical and Applied Mechanics
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Summary:In this paper, an optimum design method for buckling restrained brace frames subjected to seismic loading is presented. The multi-objective charged system search is developed to optimize costs and damages caused by the earthquake for steel frames. Minimum structural weight and minimum seismic energy which including seismic input energy divided by maximum hysteretic energy of fuse members are selected as two objective functions to find a Pareto solutions that copes with considered preferences. Also, main design constraints containing allowable amount of the inter-story drift and plastic rotation of beam, column members and plastic displacement of buckling restrained braces are controlled. The results of optimum design for three different frames are obtained and investigated by the developed method.
ISSN:1615-147X
1615-1488
DOI:10.1007/s00158-017-1791-4