Optimised cold-formed steel beams in modular building applications

Gatheeshgar, Perampalam; Poologanathan, Keerthan; Gunalan, Shanmuganathan; Tsavdaridis, Konstantinos Daniel; Nagaratnam, Brabha; Iacovidou, Eleni

doi:10.1016/j.jobe.2020.101607

Cited by 31 publications

(24 citation statements)

References 25 publications

(64 reference statements)

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“…Besides, GA is an unconstrained optimization algorithm, which means any constraint has to be incorporated directly into the objective function through an augmented Lagrangian approach or penalty factors [49]. Gatheeshgar et al [111] indicated that one of the significant advantages of PSO over GA is that the practical manufacturing and theoretical constraints could be incorporated easily in the case of PSO. Leng et al's study [81] preferred SA more than GA since it ran only on one design instead of a population and led to computational cost savings [112].…”

Section: Optimization Algorithms 231 Stochastic Search Algorithmsmentioning

confidence: 99%

“…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%

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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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Section: Optimization Algorithms 231 Stochastic Search Algorithmsmentioning

confidence: 99%

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

confidence: 99%

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

et al. 2022

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“…The structural performance of these channels, when it is used as a beam, was investigated by Degtyreva et al [25] , [26] , [27] and found that the reduction of the maximum reduction bending capacity is only 23% and 11% for distortional and local buckling failure. Moreover, Gatheeshgar et al [73] introduced these staggered slotted perforations to optimised CFS beams for modular building applications. Therefore, the concept of staggered slotted perforations is proposed to be incorporated into steel-framed modular buildings to limit the heat transfer through panels.…”

Section: Development Of Affordable Modular Unitmentioning

confidence: 99%

Development of affordable steel-framed modular buildings for emergency situations (Covid-19)

et al. 2021

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“…However, limited research has been carried out in this area [36][37][38][39][40][41][42][43][44]. Satheeskumar et al [45] investigated sustainable benefits of a crosslaminated timber-CFS composite beam, and Gatheeshgar et al [46] studied the role of an optimised CFS beam in modular constructions. A cross-laminated timber-CFS composite beam has enhanced flexural capacity by 20% compared to the individual capacities of both members [45], whereas optimised CFS sections such as Lipped Channel Beam (LCB), folded flange sections and super sigma sections have increased moment capacity by 30%, 60% and 65%, respectively [46].…”

Section: Countrymentioning

confidence: 99%

“…Therefore, both methods set the path to high-rise modular buildings with enhanced lateral stability. Figure 7 illustrates recent high-rise modular structures built all over the world using both methods [46]. Panel-based modules used in the in-filled frame method instead of traditional block or brick walls to eliminate various disadvantages including wastage, issues of being weatherproof and high cost.…”

Section: Overview Of Modular Constructionmentioning

confidence: 99%

Sustainable Performance of a Modular Building System Made of Built-Up Cold-Formed Steel Beams

et al. 2021

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Modular Building Systems (MBS) offer numerous benefits in terms of productivity, sustainability and safety. Therefore, MBSs are considered as a viable option to sort out the housing crisis in Britain as well as to drive Britain towards sustainable construction. Development in materials, manufacturing techniques, connection types and structural designs with respect to offsite construction is essential to achieve sustainable goals. Recent advancements in steel manufacturing, including Cold-Formed Steel (CFS), have showed potential benefits in structural performance compared to concrete and timber. Meanwhile, research was conducted to enhance the structural capacities of CFS sections by introducing different cross-sections, composite sections and techniques including optimization. Built-up sections were developed by connecting more than one channel section, and various research studies were conducted to assess their structural performances. However, sustainable performance of built-up sections in modular constructions is still unknown. Hence, this paper intends to develop an MBS using built-up sections for better sustainable performance. Literature review was carried out on the sustainability benefits of MBSs in terms of economic, environmental and social aspects. In addition to that, numerical analysis was performed to investigate the flexural capacity of built-up sections with different screw arrangements to address the sustainable aspects of modular construction by introducing novel sections. The numerical description, results and validations are also stated. Numerical results revealed that flexural capacities of built-up sections are improved up to 156% than those of single sections. Finally, the utilization of built-up sections in modular construction with sustainability enhancement is addressed and illustrated in a conceptual diagram.

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Optimised cold-formed steel beams in modular building applications

Abstract: This is a repository copy of Optimised Cold-Formed Steel Beams in Modular Building Applications.

Cited by 31 publications

References 25 publications

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

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

Development of affordable steel-framed modular buildings for emergency situations (Covid-19)

Sustainable Performance of a Modular Building System Made of Built-Up Cold-Formed Steel Beams

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