Bridge topology optimisation with stress, displacement and frequency constraints |
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Authors: | Hong Guan Yin-Jung ChenYew-Chaye Loo Yi-Min XieGrant P Steven |
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Affiliation: | a School of Engineering, Griffith University Gold Coast Campus, PMB 50 Gold Coast Mail Centre, Qld 9726, Australia b School of Civil and Chemical Engineering, Royal Melbourne Institute of Technology, City Campus, GPO Box 2476V, Melbourne 3001, Australia c School of Engineering, University of Durham, Durham DH1 3LE, UK |
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Abstract: | The principal stress based evolutionary structural optimisation method is presented herein for topology optimisation of arch, tied arch, cable-stayed and suspension bridges with both stress and displacement constraints. Two performance index formulas are developed to determine the efficiency of the topology design. A refined mesh scheme is proposed to improve the details of the final topology without resorting to the complete analysis of a finer mesh. Furthermore, cable-supported bridges are optimised with frequency constraint incorporating the “nibbling” technique. The applicability, simplicity and effectiveness of the method are demonstrated through the topology optimisation of the four types of bridges. |
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Keywords: | Topology optimisation Bridge structures Design constraints |
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