Shape optimization of metallic yielding devices for passive mitigation of seismic energy

Ghabraie, Kazem and Chan, Ricky and Huang, Xiaodong and Xie, Yi Min (2010) Shape optimization of metallic yielding devices for passive mitigation of seismic energy. Engineering Structures, 32 (8). pp. 2258-2267. ISSN 0141-0296

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Abstract

Bi-directional Evolutionary Structural Optimization (BESO) is a well established topology optimization technique. This method is used in this paper to optimize the shape of a passive energy dissipater designed for earthquake risk mitigation. A previously proposed shape design of a steel slit damper (SSD) device is taken as the initial design and its shape is optimized using a slightly modified BESO algorithm. Some restrictions are imposed to maintain simplicity and to reduce fabrication cost. The optimized shape shows increased energy dissipation capacity and even stress distribution. Experimental verification has been carried out and proved that the optimized shape is more resistant to low-cycle fatigue.

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Item Type:	Article (Commonwealth Reporting Category C)
Refereed:	Yes
Item Status:	Live Archive
Additional Information:	Accepted version deposited in accordance with the copyright policy of the publisher (Elsevier).
Faculty / Department / School:	Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited:	23 Mar 2011 12:09
Last Modified:	03 Jul 2013 00:27
Uncontrolled Keywords:	shape optimization; energy dissipation; bi-directional evolutionary structural optimization; metallic damper; cyclic tests; earthquake resistant structure
Fields of Research :	09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering 09 Engineering > 0905 Civil Engineering > 090504 Earthquake Engineering 01 Mathematical Sciences > 0103 Numerical and Computational Mathematics > 010303 Optimisation
Socio-Economic Objective:	E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI:	10.1016/j.engstruct.2010.03.028
URI:	http://eprints.usq.edu.au/id/eprint/18216

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