A cost optimization-based design of precast concrete floors using genetic algorithms

Albuquerque, Augusto Teixeira de; Debs, Mounir Khalil El; Melo, Álisson José Maia

doi:10.1016/j.autcon.2011.09.013

Cited by 39 publications

(10 citation statements)

References 9 publications

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“…Equation (4-7) shows the results of the working load moment ( ), bending stress (σ), allowable tensile stress under crack width limitation ( ), and flexural reinforcement ( ). Equation (8)(9)(10)(11)(12) shows the results when the inside of the PCDW panel was reinforced with wire welding (∅ 8 × 150 × 150 (fy = 400 MPa)).…”

Section: Examination Of Lpressure and Bendingmentioning

confidence: 99%

“…PCDW can contribute to securing integrity, reducing the delay in construction, and improving quality. An overall process for the member design and construction stage of the PCDW system was proposed, and its improvement effects were examined regarding various aspects in comparison to the RC method.Sustainability 2020, 12, 3454 2 of 12 various methods, including joining methods and performance verification, to be applied to special members involving difficult construction such as apartment framework, balconies, stairs, railings, and underground parking lots [12][13][14][15][16].Ji and Choi [17] researched a method of manufacturing an integrated wall by installing a link beam on the inside and outside walls of a PC and applied the method to common and reservoir walls. Furthermore, Park [18] proposed a method of forming a wall by fastening a PC panel and a panel with anchor bolts, while Oh et al [19] conducted a study to confirm the advantages of the corresponding wall in the area of air shortening.…”

mentioning

confidence: 99%

“…Sustainability 2020, 12, 3454 2 of 12 various methods, including joining methods and performance verification, to be applied to special members involving difficult construction such as apartment framework, balconies, stairs, railings, and underground parking lots [12][13][14][15][16].…”

mentioning

confidence: 99%

“…). Equations (8)-(12) shows the results when the inside of the PCDW panel was reinforced with wire welding (∅ 8 × 150 × 150 (f y = 400 MPa)).…”

mentioning

confidence: 99%

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Development and Application of Precast Concrete Double Wall System to Improve Productivity of Retaining Wall Construction

et al. 2020

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The construction of most apartment underground parking lots utilizes reinforced concrete (RC) structures composed mainly of rebar work and formwork. RC structures lower construction efficiency and significantly delay the construction because they require a large number of temporary materials and wooden formwork. In this study, a precast concrete double wall (PCDW) system was developed to address the existing problems of RC structures and to improve the productivity of retaining wall construction. PCDW is a precast concrete (PC) wall in which two thin concrete panels are connected parallel to each other with truss-shaped reinforcement between them. PCDW can contribute to securing integrity, reducing the delay in construction, and improving quality. An overall process for the member design and construction stage of the PCDW system was proposed, and its improvement effects were examined regarding various aspects in comparison to the RC method.Sustainability 2020, 12, 3454 2 of 12 various methods, including joining methods and performance verification, to be applied to special members involving difficult construction such as apartment framework, balconies, stairs, railings, and underground parking lots [12][13][14][15][16].Ji and Choi [17] researched a method of manufacturing an integrated wall by installing a link beam on the inside and outside walls of a PC and applied the method to common and reservoir walls. Furthermore, Park [18] proposed a method of forming a wall by fastening a PC panel and a panel with anchor bolts, while Oh et al. [19] conducted a study to confirm the advantages of the corresponding wall in the area of air shortening. In addition, Yang et al.[20] produced a double-synthetic precast wall with a double T-shaped PC panel facing each other to secure the economy and safety of the basement wall construction and then conducted experiments on the bending and shear behavior of the specimen. The method of pouring topping concrete after PC installation was applied also to slabs and columns. For slabs, double tee slabs, hollow slabs, and half PC slabs were identified [21]. In the case of columns, the hollowed precast concrete (HPC) column was produced by centrifugally molding a hollow PC part in the factory and pouring concrete into the field [22]. It was confirmed that the difference in performance between the existing RC structure and the HPC column was applicable to the seismic structure system. In addition, Roh and Hashlamon [23] and Kim and Kang [24] presented a development for piers and bridge columns through pouring concrete in the hollow precast and further conducted a study to analyze the seismic performance. In the case of a typical PC method, stress discontinuity due to inter-component disconnection is formed at the joint; thus, it is not easy to achieve the same performance as that of the RC structure. Furthermore, such a method may fail if the external wall support is insufficient, and there is risk of a safety accident. Therefore, the composite method of combining PC and topping concrete i...

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Section: Examination Of Lpressure and Bendingmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…). Equations (8)-(12) shows the results when the inside of the PCDW panel was reinforced with wire welding (∅ 8 × 150 × 150 (f y = 400 MPa)).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Development and Application of Precast Concrete Double Wall System to Improve Productivity of Retaining Wall Construction

et al. 2020

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“…For instance, [8] employed genetic algorithms with case-based reasoning to generate a preliminary cost estimation model. [9] used genetic algorithms to develop a costoptimization-based design of precast concrete floors. [10] used hybrid evolutionary algorithm to achieve time/cost optimization in construction project scheduling.…”

Section: Introductionmentioning

confidence: 99%

Cost Estimation of Painting Works in Nigeria Using Algorithmic Equations

Ugochukwu

Ogunsina

Udoka

et al. 2020

ACRI

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Inaccurate cost estimation of painting works often leaves a client dissatisfied and mars the professional expertise of the quantity surveyor. This is because either excess quantity of paint is left behind after completion of the work or the paints purchased and budget allotted for the project is unable to finish the work. To this end, this study developed algorithmic equations for estimating the cost (material and labour) of painting works using the common types of paints in Anambra and Enugu state of south-east Nigeria and also validated them using current market rates. This was achieved via identifying the types and peculiar features of the common paints used in the study area, determination of the average quantity of paint needed per square meter (to assess the material constant for the paints identified) and assessing the labour constant for the paints identified. Dulux, Homepride, Intercolour, Sharon (Vineyard) and Fine coat were among the common paint brands identified through market survey, interviews with the paint manufacturers, suppliers, painters and construction professionals and physical observation. Dulux was adjudged the most durable. Though quite expensive, it allows for creativity and flexibility and has an aesthetically pleasing outlook. The materials and labour constants were generated by physical observation, via a work study. The algorithmic equations developed are as follows: Up = Mc+ Lc; Mc = YAm x Cp; Lc = Y x Lp (thus: Up = YAm x Cp + YLp), where: Up = painting cost, Mc = Material cost, Lc = Labour cost, Y = Area of building to be painted, Am = Average quantity of the material per square meter (material constant), Cp = Cost of material per meter square, Lp = Cost of labour per square meter (labour constant). Validation of the model using current market rates of the last quarter of 2019 in the study area indicates that painting a wall of total area= 115.29 m2 using Sharon texcote paint for instance will cost N64,500. These equations not only have time saving potentials, they are also reliable when used for costing painting works involving the brand of paints surveyed. However, their efficacy relies heavily on accurate measurement of area of walls to be painted. These models are recommended for use by practicing quantity surveyors to generate feasibility cost estimates for painting works and shorten pre-contract time for both private and public clients.

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Multi-objective seismic design of BRBs-reinforced concrete buildings using genetic algorithms

Leyva

Bojórquez

Reyes‐Salazar

et al. 2021

Struct Multidisc Optim

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A cost optimization-based design of precast concrete floors using genetic algorithms

Cited by 39 publications

References 9 publications

Development and Application of Precast Concrete Double Wall System to Improve Productivity of Retaining Wall Construction

Development and Application of Precast Concrete Double Wall System to Improve Productivity of Retaining Wall Construction

Cost Estimation of Painting Works in Nigeria Using Algorithmic Equations

Multi-objective seismic design of BRBs-reinforced concrete buildings using genetic algorithms

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