Particle Swarm Optimization–Based Finite-Element Analyses and Designs of Shear Connector Distributions for Partial-Interaction Composite Beams
Publication: Journal of Bridge Engineering
Volume 24, Issue 4
Abstract
Particle swarm optimization–based finite-element (PSO-FE) method is introduced for the designs and analyses of the steel–concrete composite beams. After a brief explanation of the PSO-FE theory, the optimizations of shear connector distributions for the simply supported (SS) and continuous beams are carried out. An inverse calculation is firstly applied to determine the sensitivity range that is greatly varied by the shear connector stiffness. Then the patterns of shear connectors along the spans are tested for different scenarios. For an SS beam subjected to concentrated or uniformly distributed loads, the shear stiffness distributions in terms of the quadratic functions with optimized parameters could effectively reduce the interlayer slips and deflections compared with traditional uniform distributions. For a continuous composite beam after the optimization, the discrete shear connector distributions are designed in favor of real engineering construction and employed to explain the recently proposed uplift-restricted and slip-permitted connection at the negative-moment region. The PSO-FE method is thus demonstrated as an efficient and stable tool that can also be used for designs and optimizations in other aspects of composite structures.
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Acknowledgments
The first author gratefully acknowledges the support by the National Natural Science Foundation of China (51608211), the National Natural Science Foundation of Fujian Province (2017J05083), the Scientific Research Funds of Huaqiao University (16BS403), and the Fundamental Research Funds for the Central Universities. The third author gratefully acknowledges the support by the National Natural Science Foundation of China (51478422).
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Published In
Journal of Bridge Engineering
Volume 24 • Issue 4 • April 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Apr 2, 2018
Accepted: Oct 1, 2018
Published online: Feb 7, 2019
Published in print: Apr 1, 2019
Discussion open until: Jul 7, 2019
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