Optimal design of long-span steel portal frames using fabricated beams

McKinstray, Ross; Lim, James B.P.; Tanyimboh, Tiku T.; Phan, Duoc T.; Sha, Wei

doi:10.1016/j.jcsr.2014.10.010

Cited by 46 publications

(33 citation statements)

References 15 publications

(20 reference statements)

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“…Its applicability to similar [7,8] and other similarly complex and nonlinear structural problems [44] is confirmed by examples from the published literature. During its operation, GA seeks the optimum on heuristic way with the help of modifying, crossing and reconstitution of the initial set of possible solutions in every iteration steps, which are called generations.…”

Section: Reliability Analysis and Random Variablesmentioning

confidence: 57%

“…It would be favourable to understand clearly from economical point-of-view how cheaper or more reliable frames can be designed and constructed. A number of studies [1][2][3][4][5][6][7][8] exist related to the optimization of regular or tapered portal frames considering only gravitational and meteorological loads in order to achieve a more economic design usually by minimizing the weight or the initial cost of the structure. However, since the introduction of European standards, designers have to satisfy the reliability of structures according to stricter requirements.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Fire Design of Steel Tapered Portal Frames

Balogh

Vigh

2017

Period. Polytech. Civil Eng.

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Section: Reliability Analysis and Random Variablesmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Optimal Fire Design of Steel Tapered Portal Frames

Balogh

Vigh

2017

Period. Polytech. Civil Eng.

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“…The frame constructions in this paper differ from those by McKinstray et al [2] due to the asymmetry and the additional tapered frame GA configurations case. Tapered frames [3], [4] are the more efficient type of portal frame as these allow the cross-section to vary as required [5] rather than being limited to a single critical ultimate limit state (ULS) load position that would control a frame made from rolled or fabricated I sections.…”

Section: Introductionmentioning

confidence: 63%

“…In another recent paper [2], a framework for a structural design optimisation for symmetrical portal frames that used S275 steel was presented that considered frames from rolled sections and frames from fabricated sections. This present paper now investigates the effect of asymmetry [1] on the structural design optimisation with photovoltaic panels on the southward side of weight 0.4 kN/m 2 .…”

Section: Introductionmentioning

confidence: 99%

Comparison of optimal designs of steel portal frames including topological asymmetry considering rolled, fabricated and tapered sections

McKinstray

Lim

Tanyimboh

et al. 2016

Engineering Structures

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General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. AbstractA structural design optimisation has been carried out to allow for asymmetry and fully tapered portal frames. The additional weight of an asymmetric structural shape was found to be on average 5 to 13% with additional photovoltaic (PV) loading having a negligible effect on the optimum design. It was also shown that fabricated and tapered frames achieved an average percentage weight reduction of 9% and 11%, respectively, as compared to comparable hot-rolled steel frames. When the deflection limits recommended by the Steel Construction Institute were used, frames were shown to be deflection controlled with industrial limits yielding up to 40% saving.

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“…The application of genetic algorithm (GA) for optimizing hot-rolled steel portal frame buildings was considered in the literature [8][9][10][11][12]. The robustness and reliability were successfully achieved through a number of runs.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of Long-Span Cold-Formed Steel Portal Frames Accounting for Effect of Knee Brace Joint Configuration

et al. 2017

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Abstract:The application of cold-formed steel channel sections for portal frames becomes more popular for industrial and residential purposes. Experimental tests showed that such structures with long-span up to 20 m can be achieved when knee brace joints are included. In this paper, the influence of knee brace configuration on the optimum design of long-span cold-formed steel portal frames is investigated. The cold-formed steel portal frames are designed using Eurocode 3 under ultimate limit states. A novel method in handling design constraints integrated with genetic algorithm is proposed for searching the optimum design of cold-formed steel portal frames. The result showed that the proposed routine for design optimization effectively searched the near global optimum solution with the computational time is approximate 50% faster than methods being popularly used in literature. The optimum configuration for knee brace joint can reduce the section size of rafter and so the lighter frame could be obtained especially for long-span portal frame. The minimum weight of main frame obtained from optimization process is approximate 19.72% lighter than a Benchmark Frame used in the full-scale experimental test.

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Optimal design of long-span steel portal frames using fabricated beams

Cited by 46 publications

References 15 publications

Optimal Fire Design of Steel Tapered Portal Frames

Optimal Fire Design of Steel Tapered Portal Frames

Comparison of optimal designs of steel portal frames including topological asymmetry considering rolled, fabricated and tapered sections

Design Optimization of Long-Span Cold-Formed Steel Portal Frames Accounting for Effect of Knee Brace Joint Configuration

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