2026-09-19T05:22:06Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/828142022-01-13T07:53:59Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Jerome J. Connor.
Goo, Zhen John
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering.
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
2013-12-06T20:45:25Z
2013-12-06T20:45:25Z
2013
http://hdl.handle.net/1721.1/82814
862812818
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2013.
Cataloged from PDF version of thesis. "June 2013."
Includes bibliographical references (p. 51-52).
The thesis presents a technique for producing economical solutions for conventional structural steel frames using topology optimization on the lateral bracing scheme. The study focuses mainly on minimizing the amount of material used and optimizing the placement of bracing elements in typical steel frame structures to achieve economical and realistic solutions. Linear structural analysis is performed on steel frame structures while considering static gravity and wind loading. The optimization scheme uses a "multi-level design" approach with two distinct optimization loops. The optimal beam and column sizes in a structural steel frame system are generated in the first optimization loop and a bracing removal criterion is derived in the second loop to optimize the lateral bracing topology. A space constraint is imposed on the steel frame structure to enable designers to specify large empty spaces. A performance index is proposed to compare the cost between structural steel frames designed using conventional approaches, which rely on engineering experience and trial-and-error, and the approach specified in this study, which uses a multi-step optimization scheme. Two case studies are made, comparing steel frame structures designed using the proposed method with one designed using the traditional method. Keywords: Topology optimization, steel frame optimization, space-constrained optimization, multilevel optimization
by Zhen John Goo.
M.Eng.
66 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
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http://dspace.mit.edu/handle/1721.1/7582
Civil and Environmental Engineering.
Topology optimization of building bracing schemes
Thesis
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<Abstract>The thesis presents a technique for producing economical solutions for conventional structural steel frames using topology optimization on the lateral bracing scheme. The study focuses mainly on minimizing the amount of material used and optimizing the placement of bracing elements in typical steel frame structures to achieve economical and realistic solutions. Linear structural analysis is performed on steel frame structures while considering static gravity and wind loading. The optimization scheme uses a "multi-level design" approach with two distinct optimization loops. The optimal beam and column sizes in a structural steel frame system are generated in the first optimization loop and a bracing removal criterion is derived in the second loop to optimize the lateral bracing topology. A space constraint is imposed on the steel frame structure to enable designers to specify large empty spaces. A performance index is proposed to compare the cost between structural steel frames designed using conventional approaches, which rely on engineering experience and trial-and-error, and the approach specified in this study, which uses a multi-step optimization scheme. Two case studies are made, comparing steel frame structures designed using the proposed method with one designed using the traditional method. Keywords: Topology optimization, steel frame optimization, space-constrained optimization, multilevel optimization</Abstract>
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