Heuristics in optimal detailed design of precast road bridges

Piqueras, Víctor Yepes; García-Segura, Tatiana; González-Vidosa, Fernando

doi:10.1016/j.acme.2017.02.006

Cited by 23 publications

(19 citation statements)

References 35 publications

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“…So, given the relevant implications of infrastructure design, and considering that most infrastructures are designed to serve a significant group of people over a long, intergenerational period of time, the assessment of the different dimensions of sustainability related to the infrastructure design has been in the spotlight of many researchers in recent times. Studies have been conducted on cost optimisation of infrastructure design [4,5] and maintenance [6,7]. Attention has also been paid to the environmental impacts derived along the life cycle of structures, from bridges [8][9][10] to buildings [11], as well as those derived from particular construction processes, such as concrete production [12].…”

Section: Introductionmentioning

confidence: 99%

A Review of Multicriteria Assessment Techniques Applied to Sustainable Infrastructure Design

Navarro

2019

Advances in Civil Engineering

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Given the great impacts associated with the construction and maintenance of infrastructures in both the environmental, the economic and the social dimensions, a sustainable approach to their design appears essential to ease the fulfilment of the Sustainable Development Goals set by the United Nations. Multicriteria decision-making methods are usually applied to address the complex and often conflicting criteria that characterise sustainability. The present study aims to review the current state of the art regarding the application of such techniques in the sustainability assessment of infrastructures, analysing as well the sustainability impacts and criteria included in the assessments. The Analytic Hierarchy Process is the most frequently used weighting technique. Simple Additive Weighting has turned out to be the most applied decision-making method to assess the weighted criteria. Although a life cycle assessment approach is recurrently used to evaluate sustainability, standardised concepts, such as cost discounting, or presentation of the assumed functional unit or system boundaries, as required by ISO 14040, are still only marginally used. Additionally, a need for further research in the inclusion of fuzziness in the handling of linguistic variables is identified.

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Section: Introductionmentioning

confidence: 99%

A Review of Multicriteria Assessment Techniques Applied to Sustainable Infrastructure Design

Navarro

2019

Advances in Civil Engineering

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“…Pareto's optimal state is the idea that it is impossible to have more Pareto's improved state; in other words, it is impossible to improve the situation of some people without damaging anyone else [20]. Figure 3(b) shows an illustration of the Pareto optimal solutions [21,22]. e x-axis and y-axis represent that of function f2 and performance f1, correspondingly.…”

Section: Pareto Optimal Mixtures For Lower Co 2 Emissions Andmentioning

confidence: 99%

Optimization of the Mixture Design of Low‐CO₂ High‐Strength Concrete Containing Silica Fume

Kwon

Wang

2019

Advances in Civil Engineering

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As abundant CO2 is released by high-strength concrete due to its high binder content, the reduction of CO2 emissions has become increasingly important. This study proposed a general procedure to optimize the mixture design of low-CO2 high-strength concrete containing silica fume. First, the equations for evaluating strength and slump were regressed based on available experimental results. CO2 emissions were calculated based on the concrete mixtures and the unit CO2 emissions of the concrete components. By using the genetic algorithm, the concrete mixtures with the lowest CO2 emissions were determined by considering various constraints. Second, the cost of concrete was calculated based on the concrete mixtures and the unit cost of the concrete components. Similarly, the concrete mixtures with the lowest cost were determined based on the genetic algorithm. We found that, in some cases, the mixtures with the lowest CO2 emissions were different from those with the lowest cost. Third, through adding the constraint equation of cost, Pareto optimal mixtures with relatively lower CO2 emissions and lower cost were determined. In summary, the proposed technique is valuable for designing high-strength concrete considering both CO2 emissions and cost.

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“…However, a variation of these initial uncertain parameters can influence the variability of the structural behavior. Structural optimization usually uses a deterministic approach that does not consider the effects of the associated uncertainty [5][6][7][8][9][10][11][12][13]. This means that the structure has an optimum behavior only under the conditions initially defined, and the response can vary significantly when the values differ from the design values [14,15].…”

Section: Introductionmentioning

confidence: 99%

Robust Design Optimization for Low-Cost Concrete Box-Girder Bridge

2020

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The design of a structure is generally carried out according to a deterministic approach. However, all structural problems have associated initial uncertain parameters that can differ from the design value. This becomes important when the goal is to reach optimized structures, as a small variation of these initial uncertain parameters can have a big influence on the structural behavior. The objective of robust design optimization is to obtain an optimum design with the lowest possible variation of the objective functions. For this purpose, a probabilistic optimization is necessary to obtain the statistical parameters that represent the mean value and variation of the objective function considered. However, one of the disadvantages of the optimal robust design is its high computational cost. In this paper, robust design optimization is applied to design a continuous prestressed concrete box-girder pedestrian bridge that is optimum in terms of its cost and robust in terms of structural stability. Furthermore, Latin hypercube sampling and the kriging metamodel are used to deal with the high computational cost. Results show that the main variables that control the structural behavior are the depth of the cross-section and compressive strength of the concrete and that a compromise solution between the optimal cost and the robustness of the design can be reached.

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Heuristics in optimal detailed design of precast road bridges

Cited by 23 publications

References 35 publications

A Review of Multicriteria Assessment Techniques Applied to Sustainable Infrastructure Design

A Review of Multicriteria Assessment Techniques Applied to Sustainable Infrastructure Design

Optimization of the Mixture Design of Low‐CO₂ High‐Strength Concrete Containing Silica Fume

Robust Design Optimization for Low-Cost Concrete Box-Girder Bridge

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Heuristics in optimal detailed design of precast road bridges

Cited by 23 publications

References 35 publications

A Review of Multicriteria Assessment Techniques Applied to Sustainable Infrastructure Design

A Review of Multicriteria Assessment Techniques Applied to Sustainable Infrastructure Design

Optimization of the Mixture Design of Low‐CO2 High‐Strength Concrete Containing Silica Fume

Robust Design Optimization for Low-Cost Concrete Box-Girder Bridge

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Product

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Optimization of the Mixture Design of Low‐CO₂ High‐Strength Concrete Containing Silica Fume