Optimization of the structural system with composite beam and composite slab using Genetic Algorithm

Breda, Breno Dias; Pietralonga, Tiago Cetto; Alves, Elcio Cassimiro

doi:10.1590/s1983-41952020000600002

Cited by 7 publications

(8 citation statements)

References 10 publications

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“…This example presents an application of the methodology proposed herein to the Nexem building -Nucleous of Excelence in Metallic Structures (direct translation from Portuguese), shown in Figure 7. This example is also analyzed by Breda et al [28]. The structure is located at Goiabeiras campus of the Federal University of Espírito Santo (UFES) and features a composite girder and slab system with a constructed area of 264.98 m 2 .…”

Section: Example 2 -Case Study Of the Nexem Buildingmentioning

confidence: 98%

“…The design of the composite structural elements followed the standardized procedures provided by ABNT NBR 8800:2008 [26], based on limit-state design. It's Annex O of the standard prescribes the guidelines for the design of steel-concrete composite beams, while the design procedure for steel-concrete composite slabs is shown in Annex Q. Breda et al [28] presented a formulation for the optimization problem analyzed here. However, the analysis performed by the authors was limited to cost optimization of the slabs and primary beams.…”

Section: The Problem Formulationmentioning

confidence: 99%

“…According to field measurements performed by Breda et al [28], the system selected for analysis is the classroom located on the first floor, featuring steel deck MF-50 with 0.80 mm thickness, 15.0 cm of total height, reinforcing mesh Q-113 (ø 3.8 × ø 3.8 -100 × 100) and concrete with an f ck of 30 MPa. The internal composite beams V1 are simply supported and feature cross-section W 200 × 31.3, as shown in Figure 8.…”

Section: Example 2 -Case Study Of the Nexem Buildingmentioning

confidence: 99%

See 2 more Smart Citations

Optimum design of a composite floor system considering environmental and economic impacts

Arpini

Loureiro

Breda

et al. 2022

Rev. IBRACON Estrut. Mater.

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The composite floor system, composed of steel deck and concrete slab, generates more efficient and economical structures. On the other hand, the design of this type of structure has a high complexity level due to the consideration of several variables. In this respect, the objective of this paper is to present the formulation of the optimization problem for a composite floor system (steel and concrete) considering such environmental as economic impacts. To formulate the optimization problem, the reduction of environmental impact was adopted as an objective function - assuming the CO2 emission and the finance cost as parameters. The restrictions were taken by the limiting states imposed in standard NBR 8800:2008. The computer program was developed via Matlab R2016a and the optimization process was carried out using the Genetic Algorithm toolbox existing in this platform. Two application examples of the formulation at hand are presented: the first from the literature and the second from an existing building - in both situations the influences of different concrete compressive characteristic strengths were analyzed. The results of the optimization problem show a reduction in geometry and, consequently, in its weight. The solution found by the program reduces by up to 17.70% of CO2 emissions and 17.47% of the finance cost. When was applying different concrete compressive strengths, the optimal solution for environmental impact did not get the lowest cost. In general, the steel deck formwork obtained the highest percentage of environmental impact, while the beams and girders, with the same shape configuration, had the highest finance cost. Therefore, it is shown that the optimal design solution to CO2 emissions is not always the better solution for the finance cost.

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Section: Example 2 -Case Study Of the Nexem Buildingmentioning

confidence: 98%

Section: The Problem Formulationmentioning

confidence: 99%

Section: Example 2 -Case Study Of the Nexem Buildingmentioning

confidence: 99%

See 1 more Smart Citation

Optimum design of a composite floor system considering environmental and economic impacts

Arpini

Loureiro

Breda

et al. 2022

Rev. IBRACON Estrut. Mater.

Self Cite

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“…The results obtained were like those already used in practical cases. Breda et al [10] presented a numerical optimization process, using the commercial software MATLAB as the main computational tool, for the optimization of steel-concrete composite beams and steel deck systems. The study demonstrated that increasing the number of beams, while reducing its individual weight, results in smaller slab spans and, consequently, in a reduction of the overall weight and costs.…”

Section: Introductionmentioning

confidence: 99%

Structural optimization of concrete plane frames considering the static and dynamic wind effect

Cardoso

Rodríguez

Machado

et al. 2022

Rev. IBRACON Estrut. Mater.

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This study has as its main purpose the structural optimization of plane frames in concrete, having as the objective function the minimum total weight of the structure. For this purpose, external actions, considered within the optimization process, are intended to represent accurately all effects observed in a real situation. In such manner, loads are dependent on the cross-section obtained in each optimization step, as well as the static and dynamic effects of the wind are considered for a more realistic representation. The optimization method adopted is the Teaching-Learning Based Optimization (TLBO). Thus, all proper design constraints were considered in accordance with Brazilian standards for concrete structures. From the results obtained in both situations (static and dynamic effects), it is possible to notice the difference regarding external actions, in which higher loads were obtained in higher floors, using the simplified dynamic model proposed in standards. Regarding the analysis of the structure optimization, the weight was higher when the applied forces were the result of the dynamic wind model, in which the larger cross-sections were found at the bottom of the structure. Even though this may be a well-known issue, the present work shows a quantitative study in which both effects are discussed in detail, as well as it features a methodology, based on a novel optimization method and with a straightforward implementation, that could be adapted for the analysis of more complex structures.

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“…In the case of a multi-objective problem [26][27][28][29] considering cost and environmental impacts, a more iterative analysis is required to derive an optimal design proposal that minimizes the objective function while satisfying structural safety. A genetic algorithm (GA) is a good tool to solve the multi-objective problem [30], and the analysis time can be greatly reduced through the improvement of the algorithm [31]. However, when the composition of the steel-concrete beam is changed, it is necessary to calibrate the structural or design parameters constituting the GA.…”

Section: Introductionmentioning

confidence: 99%

Non-Iterative Optimal Design Method Based on LM Index for Steel Double-Beam Floor Systems Reinforced with Concrete Panels

Choi

Kim

2022

Materials

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Steel double-beam floor systems reinforced with concrete panels can improve the structural and environmental performance of buildings by reducing moment demands and embodied CO2 emissions. However, for steel double-beam floor systems, a time-consuming iterative analysis is required to derive an optimal design proposal owing to the rotational constraints in the composite joints between the concrete panel and steel beams. In this study, a non-iterative optimal design method using the LM index is proposed to minimize the embodied CO2 emissions of steel double-beam floor systems. The LM index is a measure that can be used to select the optimal cross-section of the steel beams considering the decreased moment capacity according to the unbraced length. The structural feasibility of the proposed design method was verified by investigating whether safety-related constraints were satisfied by the LM index with respect to the design variables under various gravity loads. The applicability of the proposed optimal design method is verified by comparing the embodied CO2 emissions derived from the proposed and code-based design methods. Applicable design conditions were presented based on the LM index to aid engineers. The proposed design method can provide environmentally-optimized design proposals to ensure structural safety by directly selecting the LM index of steel beams.

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Optimization of the structural system with composite beam and composite slab using Genetic Algorithm

Cited by 7 publications

References 10 publications

Optimum design of a composite floor system considering environmental and economic impacts

Optimum design of a composite floor system considering environmental and economic impacts

Structural optimization of concrete plane frames considering the static and dynamic wind effect

Non-Iterative Optimal Design Method Based on LM Index for Steel Double-Beam Floor Systems Reinforced with Concrete Panels

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