Shape optimisation of singly-symmetric cold-formed steel purlins

Guimarães, V.M.; Gilbert, Benoit P.; Talebian, Nima; Wang, B.

doi:10.1016/j.tws.2020.107402

Cited by 5 publications

(7 citation statements)

References 34 publications

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“…A variety of optimization techniques have been used in the earlier research to optimize CFS members, such as graph theory and ant colony optimization [114], Genetic Algorithms (GA) [20,50,98,113,[117][118][119][120][121][122][123][124], Particle Swarm Optimization (PSO) [21,91,111,[125][126][127][128][129][130], Direct Multi Search Optimization (DMS) [115], the Big Bang-Big Crunch algorithm (BB-BC) [131], self-shape optimization method [132], parameter-free method [133], Neutral Dynamic model [23,134,135], Simulated Annealing (SA) [112,113,124,136], the Gradient Descent Optimization (GDO) [113,122], the Trust-Region Method (TRM) [116], and Whale Optimization Algorithm (WOA) [37].…”

Section: Existing Studies In the Literature For Structural Optimizati...mentioning

confidence: 99%

“…These optimization studies can also be split into two groups: (i) optimization without any constraints on the overall cross-sectional shape (unconstrained shape optimization) [113][114][115]121,123,132,137]; and (ii) optimization of the dimensions of a predefined cross-sectional shape (constrained shape optimization) [20,21,50,91,98,112,[116][117][118][119][120]122,[124][125][126][127][128][129][130][131]134,136,[138][139][140].The latter one is more practical and easier to manufacture. More recently, nonlinear Finite Element (FE) models have been widely applied in assessing the accuracy of optimization results [21,119,123,[125][126][127][128]130,131].…”

Section: Existing Studies In the Literature For Structural Optimizati...mentioning

confidence: 99%

“…This objective was pursued by optimizing individual cross-sectional shapes [114,116,118,123,[134][135][136]138,139]. Adeli and Karim [135] developed a computational neural network model which guaranteed a local optimum solution.…”

Section: Optimization Objectivementioning

confidence: 99%

“…They indicated that MGAs showed excellent performance on seeking the minimum weight design of CFS channel beams [118]. Guimarães et al [123] optimized the shape of singly symmetric CFS purlins to minimize the cross-sectional area while satisfying the strength requirements. According to their results, the optimized purlins saved up to 6.6% of steel compared to the reference purlins.…”

Section: Optimization Objectivementioning

confidence: 99%

“…According to their results, the optimized purlins saved up to 6.6% of steel compared to the reference purlins. This cost-saving in the material was quite notable for a mass-produced product such as purlins [123].…”

Section: Optimization Objectivementioning

confidence: 99%

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A Critical Review on Optimization of Cold-Formed Steel Members for Better Structural and Thermal Performances

et al. 2022

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The construction and building sectors are currently responsible globally for a significant share of the total energy consumption and energy-related carbon dioxide emissions. The use of Modern Methods of Construction can help reduce this, one example being the use of cold-formed steel (CFS) construction. CFS channel sections have inherent advantages, such as their high strength-to-weight ratio and excellent potential for recycling and reusing. CFS members can be rolled into different cross-sectional shapes and optimizing these shapes can further improve their load-bearing capacities, resulting in a more economical and efficient building solution. Conversely, the high thermal conductivity of steel can lead to thermal bridges, which can significantly reduce the building’s thermal performance and energy efficiency. Hence, it is also essential to consider the thermal energy performance of the CFS structures. This paper reviews the existing studies on the structural optimization of CFS sections and the thermal performance of such CFS structures. In total, over 160 articles were critically reviewed. The methodologies used in the existing literature for optimizing CFS members for both structural and thermal performances have been summarized and presented systematically. Research gaps from the existing body of knowledge have been identified, providing guidelines for future research.

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