Estudo de Sensibilidade do Algoritmo de Colônia de Vagalumes para um Problema de Engenharia Envolvendo Dimensionamento de Treliças

Pereira, Larissa Longaray; Santos, Daniel C. Lorenzo; Moraes, Machado; Filho, Geraldo Machado; Ancioto, Edgar Marcos; Junior, Wanderlei Malaquias Pereira; Dantas, Maria José Pereira

doi:10.5540/tema.2020.021.03.583

Cited by 5 publications

(4 citation statements)

References 28 publications

(37 reference statements)

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“…Table 7 presents the input parameters of the FA that were based on the study by Pereira et al [34]. In the present research, a total population of 10 individuals, randomly generated, will be considered.…”

Section: Bioinspired Optimization Algorithmmentioning

confidence: 99%

Optimum design of precast and prestressed beams with focus on CO2 emission reduction

Moraes

Junior²,

Almeida

et al. 2022

Rev. IBRACON Estrut. Mater.

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Among the main contributors to CO2 emissions on the ozone layer, the construction industry contributes with a significant portion. This emission is generated largely by applying concrete construction systems and their variations. Therefore, it is important to use tools that allow the development of projects which mitigate the effects of harmful gas emissions into the atmosphere. Thus, this study applied an optimization algorithm called Firefly Algorithm (FA) to design precast and prestressed rectangular beams focusing on reducing CO2 emissions in the structural design phase. The Objective Function (OF) was defined as the total weight of CO2 emitted in each construction phase (production, transportation, and placement) and the structural design constraints are based on the design criteria established in ABNT NBR 6118. The problem optimization’s variables are geometric properties and mechanical beam's conditions, where the beam height, beam width, the proportion of height generates prestressing eccentricity, and the proportion of prestressing load were considered as design variables. Ten beams were analyzed, with different loadings, where each of these beams was submitted to the optimization process thirty times. For the proposed conditions, the ten beams had an average CO2 emission of 3282.59 kg, maximum and minimum carbon emission of 3630.52 kg and 2910.67 kg, respectively. The study resulted in a feasibility rate higher than 90%, showing that the optimization tool was efficient in the structural design phase focusing on sustainability. Concerning carbon emission, it is possible to verify a relationship between the increase of emission and the load since element with greater inertia tend to emit a greater amount of CO2. It was also possible to determine a regression between carbon emission and beam load.

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Section: Bioinspired Optimization Algorithmmentioning

confidence: 99%

Optimum design of precast and prestressed beams with focus on CO2 emission reduction

Moraes

Junior²,

Almeida

et al. 2022

Rev. IBRACON Estrut. Mater.

Self Cite

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“…Estos son característicos de la inspiración en la naturaleza para su formulación matemática. Dentro de este subgrupo se puede mencionar el método de colonia de luciérnagas, que es ampliamente utilizado en el proceso de optimización de estructuras Yang, 2011, Pereira et al, 2020Yun, 2014).…”

Section: Introductionunclassified

Análisis paramétrico comparativo del comportamiento mecánico de las cerchas planas de madera

Moraes,

Fraga,

Pereira Junior

et al. 2024

Cad. Pedagógico

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El diseño de sistema de cubiertas de trecho de madera se aplica generalmente en construcciones de varios tipos, el sistema estructural adoptado es la cercha. La cercha es ampliamente utilizada debido a su versatilidad de dimensionamiento y facilidad de ejecución, con numerosos tipos de cercha. Por lo tanto, es necesario comprender y evaluar el comportamiento a solicitaciones de las distintas tipologías existentes. Para ello, se utilizaron las hipótesis de cálculo establecidos por la norma brasileña de estructuras de madera, los métodos de elementos finitos, un algoritmo de optimización de la inteligencia de enjambre y un estudio paramétrico, con el fin de evaluar y comparar el comportamiento mecánico de dos tipologías de cerchas (Fink y Howe). Se obtuvieron curvas que describen el peso mínimo y el desplazamiento nodal máximo en función del tramo, y se observó que la cercha Howe presentó un peso entre 16 % e 125 % menor con relación a la cercha Fink. En cuanto a los desplazamientos, la tipología Howe presentó valores entre cuatro y seis veces inferiores a la tipología Fink, que señala que la tipología Howe tiene una mejor distribución de los esfuerzos normales y presenta valores máximos de desplazamiento nodal más cercanos al límite normativo verificado por el análisis de varianza con 5 % de significancia.

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“…Different swarm intelligence-based algorithms have been introduced in optimization algorithm applications, such as the Artificial Bee Colony (ABC), the Ant Colony Optimization (ACO) Algorithm, the Bat Algorithm (BA), Particle Swarm Optimization (PSO), and the Firefly Algorithm (FA). FA is widely used in structural optimization processes [29,34,[47][48][49].…”

mentioning

confidence: 99%

“…presents the parameters used in the present study, based on the sensitivity study of Pereira et al[49].…”

mentioning

confidence: 99%

Comparative Analysis of the Mechanical Performance of Timber Flat Truss Typologies for Different Strength Classes via Optimization Algorithm

Moraes,

Fraga,

Menezes

et al. 2023

Buildings

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This study aimed to compare the mechanical performance of two truss typologies, the modified Fan and Howe trusses, using five different wood species: Cambará-rosa, Cupiúba, Angelim-pedra, Garapa, and Jatobá. The spans considered were 6, 9, 12, and 15 m, and the optimization algorithm used was a swarm intelligence algorithm to minimize the structure weight. The study found that wood is a sustainable and viable option for truss constructions, with different wood species having distinct mechanical properties that must be considered when designing the structure. The Howe truss typology presented lower results for the objective function in comparison with the modified Fan truss. The distribution of normal forces in the truss correlated with the characteristic strength in compression and tensile of the species. The Howe truss typology presented a larger amplitude in relation to the modified Fan truss typology in most of the conditions adopted for the Ultimate Limit State constraints. Constraints associated with deflection in the immediate condition were observed to limit the optimization process. The study used the matrix analysis method to evaluate internal efforts and nodal displacements in the trusses. In summary, this study demonstrates the importance of considering all constraints when dimensioning timber structures and the benefits of using different wood species for sustainable construction.

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Estudo de Sensibilidade do Algoritmo de Colônia de Vagalumes para um Problema de Engenharia Envolvendo Dimensionamento de Treliças

Cited by 5 publications

References 28 publications

Optimum design of precast and prestressed beams with focus on CO2 emission reduction

Optimum design of precast and prestressed beams with focus on CO2 emission reduction

Análisis paramétrico comparativo del comportamiento mecánico de las cerchas planas de madera

Comparative Analysis of the Mechanical Performance of Timber Flat Truss Typologies for Different Strength Classes via Optimization Algorithm

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