Optimización multiobjetivo de pasarelas atendiendo a criterios de sostenibilidad y confort del usuario

Acaban de publicarnos un artículo en el International Journal of Environmental Research and Public Health, revista indexada en el JCR. Se trata de la optimización multiobjetivo de pasarelas atendiendo al coste, las emisiones de CO₂ y la aceleración vertical causada por el paso humano. El trabajo se enmarca dentro del proyecto de investigación HYDELIFE que dirijo como investigador principal en la Universitat Politècnica de València. Se trata de una colaboración con la universidad Passo Fundo, de Brasil.

La tendencia hacia estructuras más sostenibles se está convirtiendo en una demanda creciente, y los ingenieros pueden aplicar técnicas de optimización para mejorar el proceso de diseño y dimensionamiento. Esto permitirá encontrar soluciones que reduzcan los costos y los impactos ambientales y sociales. En el caso de las pasarelas peatonales, es esencial garantizar el bienestar de los usuarios, además de cumplir con los estándares de seguridad, especialmente en lo que se refiere a las vibraciones humanas. Con este objetivo en mente, se llevó a cabo una optimización multiobjetivo de un puente peatonal de acero y hormigón. Se buscó minimizar el costo, las emisiones de dióxido de carbono y la aceleración vertical causada por la actividad humana. Se aplicó la técnica de Búsqueda de Armonía Multiobjetivo (MOHS) para obtener soluciones no dominadas y crear un Frente de Pareto. Se analizaron dos escenarios con diferentes emisiones unitarias obtenidas de una evaluación de su ciclo de vida en la literatura. Los resultados demuestran que, aumentando el costo de la estructura en un 15%, la aceleración vertical disminuye de 2,5 a 1,0 m/s². Para ambos escenarios, la relación óptima entre la altura del alma y la luz total se encuentra entre Le/20 y Le/16. La altura del alma, la resistencia del hormigón y el espesor de la losa son las variables de diseño que tienen el mayor impacto en la aceleración vertical. Las soluciones Pareto-óptimas mostraron una sensibilidad considerable a los parámetros variados en cada escenario, resultando en un cambio en el consumo de hormigón y en las dimensiones de la viga de acero soldado. Esto destaca la importancia de realizar un análisis de sensibilidad en los problemas de optimización.

Abstract:

The demand for more sustainable structures has been shown as a growing tendency. Engineers can use optimization techniques to aid in designing and sizing, achieving solutions that minimize cost and environmental and social impacts. In pedestrian bridges, which are subjected to human-induced vibrations, it is also important to ensure the users’ comfort, besides the security verifications. In this context, this paper aims to perform a multi-objective optimization of a steel-concrete composite pedestrian bridge, minimizing cost, carbon dioxide emissions, and vertical acceleration caused by human walking. For this, the Multi-Objective Harmony Search (MOHS) was applied to obtain non-dominated solutions and compose a Pareto Front. Two scenarios were considered with different unit emissions obtained from a life cycle assessment in the literature. Results show that by increasing 15% the structure cost, the vertical acceleration is reduced from 2.5 to 1.0 m/s². For both scenarios, the optimal ratio for the web height and total span (L_e) lies between L_e/20 and L_e/16. The web height, concrete strength, and slab thickness were the design variables with more influence on the vertical acceleration value. The Pareto-optimal solutions were considerably sensitive to the parameters varied in each scenario, changing concrete consumption and dimensions of the welded steel I-beam, evidencing the importance of carrying out a sensitivity analysis in optimization problems.

Keywords:

Multi-objective optimization; pedestrian bridge; sustainability; harmony search; carbon emissions

Reference:

TRES JUNIOR, F.L.; YEPES, V.; MEDEIROS, G.F.; KRIPKA, M. (2023). Multi-objective Optimization Applied to the Design of Sustainable Pedestrian Bridges. International Journal of Environmental Research and Public Health, 20(4), 3190. DOI:10.3390/ijerph20043190

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Special Issue “2nd Edition of Trends in Sustainable Buildings and Infrastructure”

High visibility: indexed by the Science Citation Index Expanded, the Social Sciences Citation Index (Web of Science) and other databases. Impact Factor: 3.390 (2020)

JCR category rank: Q1: Public, Environmental & Occupational Health (SSCI) | Q2: Public, Environmental & Occupational Health (SCIE) | Q2: Environmental Sciences (SCIE)

Special Issue “2nd Edition of Trends in Sustainable Buildings and Infrastructure”

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601).

Deadline for manuscript submissions: 30 September 2022.

Special Issue Editors

Guest Editor

Prof. Dr. Víctor Yepes

Concrete Science and Technology Institute (ICITECH), Department of Construction Engineering and Civil Engineering Projects, Universitat Politècnica de València Valencia, Spain
Interests: multiobjective optimization; structures optimization; lifecycle assessment; social sustainability of infrastructures; reliability-based maintenance optimization; optimization and decision-making under uncertainty

Guest Editor

Prof. Dr. Moacir Kripka

Civil and Environmental Engineering Graduate Program (PPGEng), University of Passo Fundo, Passo Fundo CEP 99052-900, Brazil
Interests: structural analysis; optimization; building; engineering optimization; civil engineering; linear programming; mathematical programming; heuristics; structural optimization; concrete; combinatorial optimization; structural engineering; multiobjective optimization; reinforced concrete; optimization methods; discrete optimization; optimization theory; simulated annealing; optimization software

Special Issue Information

Dear Colleagues,

This Special Issue is the 2nd edition of Trends in Sustainable Buildings and Infrastructure. The recently established Sustainable Development Goals call for a paradigm shift in the way buildings and infrastructures are conceived. The construction industry is a main source of environmental impacts, given its great material consumption and energy demands. It is also a major contributor to the economic growth of regions through the provision of useful infrastructure and generation of employment, among others. Conventional approaches underlying current building design practices fall short of covering the relevant environmental and social implications derived from inappropriate design, construction, and planning. The development of adequate sustainable design strategies is therefore becoming extremely relevant with regard to the achievement of the United Nations 2030 Agenda Goals for Sustainable Development.

This Special Issue aims to increase knowledge on sustainable design practices by highlighting the actual research trends that explore efficient ways to reduce the environmental consequences related to the construction industry while promoting social wellbeing and economic development. These objectives include but are not limited to:

Life-cycle-oriented building and infrastructure design;
Design optimization based on sustainable criteria;
Maintenance design towards sustainability;
Inclusion of social impacts in the design of buildings and infrastructures;
Resilience and sustainability;
Use of sustainable materials;
Decision-making processes that effectively integrate economic, environmental, and social aspects.

Papers selected for this Special Issue will be subject to a rigorous peer-review procedure with the aim of rapid and wide dissemination of research results, developments, and applications.

Submission

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Environmental Research and Public Health is an international peer-reviewed open access semimonthly journal published by MDPI.

Keywords

Sustainable design and construction
Life cycle assessment
Sustainability in decision making
Green buildings
Sustainable maintenance
Resilient structures
Sustainable materials
Social life cycle assessment
Sustainable management of infrastructures
Multiobjective optimization for sustainable development

Special Issue “Optimization for Decision Making III”

Mathematics (ISSN 2227-7390) is a peer-reviewed open access journal which provides an advanced forum for studies related to mathematics, and is published monthly online by MDPI.

Open Access – free for readers, with article processing charges (APC) paid by authors or their institutions.
High visibility: Indexed in the Science Citation Indexed Expanded – SCIE (Web of Science) from Vol. 4 (2016), Scopus, and Zentralblatt MATH from Vol. 3 (2015).
Rapid publication: manuscripts are peer-reviewed and a first decision provided to authors approximately 21.7 days after submission; acceptance to publication is undertaken in 5.3 days (median values for papers published in this journal in the second half of 2018).
Recognition of reviewers: reviewers who provide timely, thorough peer-review reports receive vouchers entitling them to a discount on the APC of their next publication in any MDPI journal, in appreciation of the work done.

Impact Factor: 1.747 (2019) (First decile JCR journal)

Special Issue “Optimization for Decision Making III”

Deadline for manuscript submissions: 30 June 2021.

Special Issue Editors

Guest Editor Prof. Víctor Yepes Universitat Politècnica de València, Spain Website \| E-Mail Interests: multiobjective optimization; structures optimization; lifecycle assessment; social sustainability of infrastructures; reliability-based maintenance optimization; optimization and decision-making under uncertainty
Guest Editor Prof. José M. Moreno-Jiménez Universidad de Zaragoza Website \| E-Mail Interests: multicriteria decision making; environmental selection; strategic planning; knowledge management; evaluation of systems; logistics and public decision making (e-government, e-participation, e-democracy and e-cognocracy)

Special Issue Information

Dear Colleagues,

In the current context of the electronic governance of society, both administrations and citizens are demanding greater participation of all the actors involved in the decision-making process relative to the governance of society. In addition, the design, planning, and operations management rely on mathematical models, the complexity of which depends on the detail of models and complexity/characteristics of the problem they represent. Unfortunately, decision-making by humans is often suboptimal in ways that can be reliably predicted. Furthermore, the process industry seeks not only to minimize cost, but also to minimize adverse environmental and social impacts. On the other hand, in order to give an appropriate response to the new challenges raised, the decision-making process can be done by applying different methods and tools, as well as using different objectives. In real-life problems, the formulation of decision-making problems and application of optimization techniques to support decisions is particularly complex, and a wide range of optimization techniques and methodologies are used to minimize risks or improve quality in making concomitant decisions. In addition, a sensitivity analysis should be done to validate/analyze the influence of uncertainty regarding decision-making.

Prof. Víctor Yepes
Prof. José Moreno-Jiménez
Guest Editors

Manuscript Submission Information

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Mathematics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI’s English editing service prior to publication or during author revisions.

Keywords

Multicriteria decision making
Optimization techniques
Multiobjective optimization

Special Issue “Trends in Sustainable Buildings and Infrastructure”

High visibility: indexed by the Science Citation Index Expanded, the Social Sciences Citation Index (Web of Science) and other databases. Impact Factor: 2.468 (2018)

Special Issue “Trends in Sustainable Buildings and Infrastructure”

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601).

Deadline for manuscript submissions: 31 October 2020.

Special Issue Editors

Guest Editor Prof. Dr. Víctor Yepes Concrete Science and Technology Institute (ICITECH), Department of Construction Engineering and Civil Engineering Projects, Universitat Politècnica de València Valencia, Spain Interests: multi-objective optimization; life-cycle assessment; decision-making; sustainability; concrete structures; CO2 emissions; construction management
Guest Editor Dr. Ignacio J. Navarro Department of Construction Engineering and Civil Engineering Projects, Universitat Politècnica de València Valencia, Spain Interests: multicriteria decision making; reliability-based maintenance optimization; sustainability of infrastructures; social impacts of infrastructures

Special Issue Information

Dear Colleagues,

The recently established Sustainable Development Goals call for a paradigm shift in the way buildings and infrastructures are conceived. The construction industry is a main source of environmental impacts, given its great material consumption and energy demands. It is also a major contributor to the economic growth of regions through the provision of useful infrastructure and generation of employment, among others. Conventional approaches underlying current building design practices fall short of covering the relevant environmental and social implications derived from inappropriate design, construction, and planning. The development of adequate sustainable design strategies is therefore becoming extremely relevant with regard to the achievement of the United Nations 2030 Agenda Goals for Sustainable Development.

Life-cycle-oriented building and infrastructure design;
Design optimization based on sustainable criteria;
Maintenance design towards sustainability;
Inclusion of social impacts in the design of buildings and infrastructures;
Resilience and sustainability;
Use of sustainable materials;
Decision-making processes that effectively integrate economic, environmental, and social aspects.

Papers selected for this Special Issue will be subject to a rigorous peer-review procedure with the aim of rapid and wide dissemination of research results, developments, and applications.

Submission

Keywords

Sustainable design and construction
Life cycle assessment
Sustainability in decision making
Green buildings
Sustainable maintenance
Resilient structures
Sustainable materials
Social life cycle assessment
Sustainable management of infrastructures
Multiobjective optimization for sustainable development

Special Issue “Optimization for Decision Making II”

Mathematics (ISSN 2227-7390) is a peer-reviewed open access journal which provides an advanced forum for studies related to mathematics, and is published monthly online by MDPI.

Open Access – free for readers, with article processing charges (APC) paid by authors or their institutions.
High visibility: Indexed in the Science Citation Indexed Expanded – SCIE (Web of Science) from Vol. 4 (2016), Scopus, and Zentralblatt MATH from Vol. 3 (2015).
Rapid publication: manuscripts are peer-reviewed and a first decision provided to authors approximately 21.7 days after submission; acceptance to publication is undertaken in 5.3 days (median values for papers published in this journal in the second half of 2018).
Recognition of reviewers: reviewers who provide timely, thorough peer-review reports receive vouchers entitling them to a discount on the APC of their next publication in any MDPI journal, in appreciation of the work done.

Impact Factor: 1.105 (2018) (First quartile, JCR)

Special Issue “Optimization for Decision Making II”

Deadline for manuscript submissions: 29 February 2020.

Special Issue Editors

Guest Editor Prof. Víctor Yepes Universitat Politècnica de València, Spain Website \| E-Mail Interests: multiobjective optimization; structures optimization; lifecycle assessment; social sustainability of infrastructures; reliability-based maintenance optimization; optimization and decision-making under uncertainty
Guest Editor Prof. José M. Moreno-Jiménez Universidad de Zaragoza Website \| E-Mail Interests: multicriteria decision making; environmental selection; strategic planning; knowledge management; evaluation of systems; logistics and public decision making (e-government, e-participation, e-democracy and e-cognocracy)

Special Issue Information

Dear Colleagues,

Prof. Víctor Yepes
Prof. José Moreno-Jiménez
Guest Editors

Manuscript Submission Information

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Mathematics is an international peer-reviewed open access monthly journal published by MDPI.

Keywords

Multicriteria decision making
Optimization techniques
Multiobjective optimization

Special Issue “Optimization for Decision Making”

Mathematics (ISSN 2227-7390) is a peer-reviewed open access journal which provides an advanced forum for studies related to mathematics, and is published monthly online by MDPI.

Open Access – free for readers, with article processing charges (APC) paid by authors or their institutions.
High visibility: Indexed in the Science Citation Indexed Expanded – SCIE (Web of Science) from Vol. 4 (2016), Scopus from Vol. 5 (2017) and Zentralblatt MATH from Vol. 3 (2015).

Special Issue “Optimization for Decision Making”

Deadline for manuscript submissions: 31 May 2019

Special Issue Editors

Guest Editor Prof. Víctor Yepes Universitat Politècnica de València, Spain Website \| E-Mail Interests: multiobjective optimization; structures optimization; lifecycle assessment; social sustainability of infrastructures; reliability-based maintenance optimization; optimization and decision-making under uncertainty
Guest Editor Prof. José M. Moreno-Jiménez Universidad de Zaragoza Website \| E-Mail Interests: multicriteria decision making; environmental selection; strategic planning; knowledge management; evaluation of systems; logistics and public decision making (e-government, e-participation, e-democracy and e-cognocracy)

Special Issue Information

Dear Colleagues,

In the current context of the electronic governance of society, both administrations and citizens are demanding greater participation of all the actors involved in the decision-making process relative to the governance of society. In addition, the design, planning, and operations management rely on mathematical models, the complexity of which depends on the detail of models and complexity/characteristics of the problem they represent. Unfortunately, decision-making by humans is often suboptimal in ways that can be reliably predicted. Furthermore, the process industry seeks not only to minimize cost, but also to minimize adverse environmental and social impacts. On the other hand, in order to give an appropriate response to the new challenges raised, the decision-making process can be done by applying different methods and tools, as well as using different objectives. In real-life problems, the formulation of decision-making problems and application of optimization techniques to support decisions are particularly complex and a wide range of optimization techniques and methodologies are used to minimize risks or improve quality in making concomitant decisions. In addition, a sensitivity analysis should be done to validate/analyze the influence of uncertainty regarding decision-making.

Prof. Víctor Yepes
Prof. José M. Moreno-Jiménez
Guest Editors

Manuscript Submission Information

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Mathematics is an international peer-reviewed open access monthly journal published by MDPI. Please visit the Instructions for Authors page before submitting a manuscript.

Keywords

Multicriteria decision making
Optimization techniques
Multiobjective optimization

Optimización del diseño sostenible de puentes bajo incertidumbre

Nos acaban de publicar en la revista de Elsevier del primer decil, Journal of Cleaner Production, un artículo donde se propone una nueva metodología en la toma de decisiones del diseño óptimo de un puente bajo criterios de sostenibilidad y bajo incertidumbre. Este artículo forma parte de nuestra línea de investigación BRIDLIFE en la que se pretenden optimizar estructuras atendiendo no sólo a su coste, sino al impacto ambiental y social que generan a lo largo de su ciclo de vida.

Abstract:

Today, bridge design seeks not only to minimize cost but also to minimize adverse environmental and social impacts. This multi-criteria decision-making problem is subject to variability of stakeholders’ opinions regarding the importance of criteria for sustainability. As a result, this paper proposes a method for designing and selecting optimally sustainable bridges under the uncertainty of criteria comparison. A Pareto set of solutions is obtained using a metamodel-assisted multi-objective optimization. A new decision-making technique introduces the uncertainty of the decision-makers preference through triangular distributions and thereby ranks the sustainable bridge designs. The method is illustrated by a case study of a three-span post-tensioned concrete box-girder bridge designed according to the embodied energy, overall safety, and corrosion initiation time. In this case, 211 efficient solutions are reduced to two preferred solutions with a probability of being selected of 81.6% and 18.4%. In addition, a sensitivity analysis validates the influence of the uncertainty regarding the decision-making. The approach proposed allows actors involved in the bridge design and decision-making to determine the best sustainable design by finding the probability of a given design being chosen.

Keywords:

Sustainable criteria
Uncertainty
Decision-making
Multi-objective optimization
Energy efficiency

Reference:

GARCÍA-SEGURA, T.; PENADÉS-PLÀ, V.; YEPES, V. (2018). Sustainable bridge design by metamodel-assisted multi-objective optimization and decision-making under uncertainty. Journal of Cleaner Production, 202:904-915. https://doi.org/10.1016/j.jclepro.2018.08.177

Redes neuronales aplicadas al diseño multiobjetivo de puentes postesados

Nos acaban de publicar en línea en la revista Structural and Multidisciplinary Optimization (revista indexada en JCR en el primer cuartil) un trabajo de investigación en el que utilizamos las redes neuronales artificiales junto para el diseño multiobjetivo de puentes postesados de carreteras. Os paso a continuación el resumen y el enlace al artículo por si os resulta de interés. El enlace del artículo es el siguiente: http://link.springer.com/article/10.1007%2Fs00158-017-1653-0

Referencia:

García-Segura, T.; Yepes, V.; Frangopol, D.M. (2017). Multi-objective design of post-tensioned concrete road bridges using artificial neural networks. Structural and Multidisciplinary Optimization, doi:10.1007/s00158-017-1653-0

Abstract:

In order to minimize the total expected cost, bridges have to be designed for safety and durability. This paper considers the cost, the safety, and the corrosion initiation time to design post-tensioned concrete box-girder road bridges. The deck is modeled by finite elements based on problem variables such as the cross-section geometry, the concrete grade, and the reinforcing and post-tensioning steel. An integrated multi-objective harmony search with artificial neural networks (ANNs) is proposed to reduce the high computing time required for the finite-element analysis and the increment in conflicting objectives. ANNs are trained through the results of previous bridge performance evaluations. Then, ANNs are used to evaluate the constraints and provide a direction towards the Pareto front. Finally, exact methods actualize and improve the Pareto set. The results show that the harmony search parameters should be progressively changed in a diversification-intensification strategy. This methodology provides trade-off solutions that are the cheapest ones for the safety and durability levels considered. Therefore, it is possible to choose an alternative that can be easily adjusted to each need.

Keywords:

Multi-objective harmony search; Artificial neural networks; Post-tensioned concrete bridges; Durability; Safety.

Os dejo a continuación la versión autor del artículo.

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Multiobjective optimization of post-tensioned concrete box-girder road bridges considering cost, CO2 emissions, and safety

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http://authors.elsevier.com/a/1TROAW4G4Bhqk

Abstract: This paper presents a multiobjective optimization of post-tensioned concrete road bridges in terms of cost, CO₂ emissions, and overall safety factor. A computer tool links the optimization modulus with a set of modules for the finite-element analysis and limit states verification. This is applied for the case study of a three-span continuous post-tensioned box-girder road bridge, located in a coastal region. A multiobjective harmony search is used to automatically search a set of optimum structural solutions regarding the geometry, concrete strength, reinforcing and post-tensioned steel. Diversification strategies are combined with intensification strategies to improve solution quality. Results indicate that cost and CO₂ emissions are close to each other for any safety range. A one-euro reduction, involves a 2.34 kg CO₂ emissions reduction. Output identifies the best variables to improve safety and the critical limit states. This tool also provides bridge managers with a set of trade-off optimum solutions, which balance their preferences most closely, and meet the requirements previously defined.

Keywords

Multiobjective optimization;
CO₂ emissions;
Safety;
Post-tensioned concrete;
Box-girder bridge;
Multiobjective harmony search

Highlights

A multiobjective optimization of post-tensioned concrete road bridges is presented.
A computer tool combines finite-element analysis and limit states verification.
Output provides a trade-off between cost, CO₂ emissions, and overall safety factor.
Near the optima, a one-euro reduction represents a 2.34 kg CO₂ emissions reduction.
Results show the cheapest and most eco-friendly variables for improving safety.

Reference:

GARCÍA-SEGURA, T.; YEPES, V. (2016). Multiobjective optimization of post-tensioned concrete box-girder road bridges considering cost, CO2 emissions, and safety. Engineering Structures, 125:325-336. DOI: 10.1016/j.engstruct.2016.07.012.