VisualUVAM: Una nueva herramienta para el apoyo en la toma de decisiones sobre vulnerabilidad urbana

Nos acaban de publicar en la revista Sustainaibility (segundo cuartil en Web of Science) un artículo donde se explica una nueva metodología, VisualUVAM, que sirve de apoyo en la toma de decisiones relacionada con la vulnerabilidad urbana. Esta herramienta se ha aplicado a nivel regional, provincial y municipal en España. Complementa los artículos y estudios previos realizados por nuestro grupo de investigación en el marco del proyecto de  investigación DIMALIFE, plasmados en la tesis doctoral de Jorge Salas, de la que ya comentamos algo en un artículo anterior.

Como se trata de una publicación en abierto, os dejo a continuación el artículo completo para su descarga.

Referencia:

SALAS, J.; YEPES, V. (2019). VisualUVAM: A Decision Support System Addressing the Curse of Dimensionality for the Multi-Scale Assessment of Urban Vulnerability in Spain. Sustainability, 11(8), 2191. doi:10.3390/su11082191

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Selección de puentes sostenibles de vanos pequeños en Brasil

Nos acaban de publicar en la revista Sustainaibility (segundo cuartil en Web of Science) un artículo donde se aplica la toma de decisiones multicriterio (AHP y Vikor) para seleccionar el tipo de puente de vano corto más idóneo desde el punto de vista de la sostenibilidad en el contexto de Brasil.

Se trata del fruto del trabajo conjunto desarrollado por el profesor Moacir Kripka, catedrático de estructuras en la Universidade de Passo Fundo, que estuvo de estancia en nuestra universidad hace unos meses.

Este artículo forma parte de nuestra línea de investigación DIMALIFE 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.

Como se trata de una publicación en abierto, os dejo a continuación el artículo completo para su descarga.

 

Referencia:

KRIPKA, M.; YEPES, V.; MILANI, C.J. (2019). Selection of sustainable short-span bridge design in Brazil. Sustainability, 11:1307. DOI: 10.3390/su11051307

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Técnicas de decisión multicriterio para la educación de ingenieros en sostenibilidad

ABSTRACT

In recent times, a great deal of interest has emerged from different sectors of society towards sustainability and sustainable product design. Decision makers are increasingly encouraged to take into consideration the economic, environmental and social dimensions of reality when dealing with problems. Sustainability is of particular importance in the field of civil engineering, where structures are designed that are long lasting and shall cause significant impacts over a long period of time, such as bridges or dams. Consequently, when addressing a structural design, civil engineers shall account for the three dimensions of sustainability, which usually show conflicting perspectives. Multi-criteria methods allow the inclusion of non-monetary aspects into the design process of infrastructure. In the postgraduate course ‘Predictive and optimisation models for concrete structures’, offered at the Masters in Concrete Engineering of the Universitat Politècnica de València, civil engineering students are taught how to apply such tools within the framework of sustainable design of concrete structures. The present paper conducts a state-of-the-art review of the main multi-criteria decision making methodologies taught in the course in the context of sustainability. Articles are searched in recognized databases, such as SCOPUS and Web of Science. The most significant methods, such as Analytical Hierarchy Process (AHP), Elimination and Choice Expressing Reality (ELECTRE), Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) or Complex Proportional Assessment (COPRAS) are systematically discussed, identifying the actual trends concerning the use of such methodologies in the field of civil engineering. The review provides a deep insight in the multi criteria techniques that are most frequently used when assessing sustainability of infrastructure designs.

KEYWORDS

Postgraduate education; multi-criteria decision making; sustainability; structural design; state of the art review

REFERENCE

NAVARRO, I.; MARTÍ, J.V.; YEPES, V. (2018). Multi-criteria decision making techniques in civil engineering education for sustainability. Proceedings of ICERI2018,the 11th annual International Conference of Education, Research and Innovation, Seville (Spain), 12th-14th November 2018, pp. 9798-9807.  ISBN: 978-84-09-05948-5

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Comparativa medioambiental de muros atendiendo a su ciclo completo de vida

Acaban de publicarnos un artículo en la revista Journal of Cleaner Production (primer decil del JCR), de la editorial ELSEVIER, en la que analizamos una de las construcciones más habituales en la ingeniería civil, como son las estructuras de contención de tierras.

Se ha realizado para ello un análisis de ciclo de vida completo de cuatro tipos de muros: muros de hormigón armado, de hormigón en masa, de gaviones y de escollera. Además se ha realizado un estudio paramétrico para averiguar hasta qué altura de tierras es mejor una u otra tipología. Las conclusiones obtenidas no son evidentes a priori. Podéis verlas en el resumen que os paso a continuación.

Además, la editorial ELSEVIER nos permite la distribución gratuita del artículo hasta el 29 de junio de 2018. Por tanto, os paso el enlace para que os podáis descargar este artículo: https://authors.elsevier.com/a/1X15O3QCo9R1sI

Referencia:

PONS, J.J.; PENADÉS-PLÀ, V.; YEPES, V.; MARTÍ, J.V. (2018). Life cycle assessment of earth-retaining walls: An environmental comparison. Journal of Cleaner Production, 192:411-420.  https://doi.org/10.1016/j.jclepro.2018.04.268

Abstract:

Earth-retaining walls are one of the most common structures in civil engineering, a discipline of the construction sector, which is known to produce one of the highest environmental impacts. Therefore, developing cleaner design and construction practices could contribute to a more sustainable future for our planet. To make a step towards this goal, this study comprises the life cycle assessment (LCA) of the four most common earth-retaining walls built between 1 to 6 m of height: cantilever walls, gravity walls, masonry walls and gabion walls to obtain the best solutions for the environment. To assess the environmental impacts caused throughout their whole life-cycle including the production, construction, use and end of life phases, we used the OpenLCA software, the ecoinvent 3.3 database and the ReCiPe (H) method. The associated uncertainties have been considered and the results are provided in both midpoint and endpoint approaches. Our findings show that gabion and masonry walls produce the lowest global impact. On the one hand, gabion walls cause less damage to human health but on the other hand, masonry walls cause less damage to the ecosystems. Furthermore, gravity walls produce similar impacts to gabion and masonry walls between 1 and 3 m of height as well as fewer impacts than cantilever walls for a height of 4 m. In conclusion, gabion and masonry walls are preferable to concrete walls for heights between 1 and 6 m and cantilever walls should be used over gravity walls for greater heights than 4.5 m.

Keywords:

Life cycle assessment; Sustainability; Earth-retaining wall; ReCiPe

Highlights:

  • Four earth-retaining walls are compared to obtain the best environmental solution.
  • The OpenLCA software, the Ecoinvent 3.3 database and the ReCiPe (H) method are used.
  • Gabion walls cause less damage to human health than masonry walls.
  • Masonry walls cause less damage to the ecosystems than gabion walls.
  • Mass concrete walls are cleaner than reinforced ones until 4.5 m of height.

 

 

¿Cómo afectan los costes al mantenimiento de un puente cuando se consideran aspectos sociales?

https://www.ailladearousa.com

Pocas veces se incorporan en los proyectos de puentes actuales las variables sociales como factores determinantes de su diseño. Tampoco se dedica la atención suficiente al análisis del coste del ciclo de vida para evaluar la mejor alternativa posible de diseño. Considerar en nuestros proyectos este tipo de variables podría reducir, por ejemplo, en un 60% los costes de mantenimiento. También se constataría el hecho de que incrementar solamente 5 mm el recubrimiento de las armaduras de las estructuras de hormigón podría reducir el coste del mantenimiento en un 40%. Un ejemplo de la aplicación de este tipo de metodologías es la que nos acaban de publicar en la revista Sustainability. Allí se ha analizado el coste del ciclo de vida de las medidas de prevención aplicado a un puente de hormigón postesado expuesto al ataque de clorhídricos. Para ello se ha elegido el puente de la Isla de Arosa, en Galicia (España). Os dejo el artículo completo y la referencia.

Referencia:

NAVARRO, I.J.; YEPES, V.; MARTÍ, J.V. (2018). Life cycle cost assessment of preventive strategies applied to prestressed concrete bridges exposed to chlorides. Sustainability, 10(3):845. doi:10.3390/su10030845 .

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Análisis de ciclo de vida de puentes óptimos de vigas artesa

Acaban de publicarnos un artículo en la revista internacional Sustainability sobre análisis de ciclo de vida de puentes óptimos de vigas. La evaluación del impacto ambiental se realiza a lo largo del ciclo de vida de puentes de hormigón postesado de vigas artesa que previamente han sido optimizados mediante una metaheurística de algoritmos meméticos. Os dejo a continuación la referencia de la revista. Además os podéis descargar y distribuir el artículo sin problema, pues está editado en abierto:

http://www.mdpi.com/2071-1050/10/3/685/html

Referencia:

PENADÉS-PLÀ, V.; GARCÍA-SEGURA, T.; MARTÍ, J.V.; YEPES, V. (2018). An optimization-LCA of a prestressed concrete precast bridge. Sustainability, 10(3):685. doi:10.3390/su10030685

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Análisis del ciclo de vida: comparación entre dos puentes postesados óptimos de sección en cajón

Acaban de publicarnos un artículo en la revista del JCR (Q2) Sustainability que compara dos puentes postesados óptimos de sección en cajón atendiendo a su ciclo de vida. Creemos que la metodología empleada puede ser de interés para casos de estructuras de hormigón similares a las presentadas. El artículo forma parte del proyecto de investigación BRIDLIFE “Puentes pretensados de alta eficiencia social y medioambiental bajo presupuestos restrictivos“.

Os paso a continuación el resumen y el artículo propiamente dicho, pues está publicado en abierto.

 

 

Abstract:

The goal of sustainability involves a consensus among economic, environmental and social factors. Due to climate change, environmental concerns have increased in society. The construction sector is among the most active high environmental impact sectors. This paper proposes new features to consider a more detailed life-cycle assessment (LCA) of reinforced or pre-stressed concrete structures. Besides, this study carries out a comparison between two optimal post-tensioned concrete box-girder road bridges with different maintenance scenarios. ReCiPe method is used to carry out the life-cycle assessment. The midpoint approach shows a complete environmental profile with 18 impact categories. In practice, all the impact categories make their highest contribution in the manufacturing and use and maintenance stages. Afterwards, these two stages are analyzed to identify the process which makes the greatest contribution. In addition, the contribution of CO2fixation is taken into account, reducing the environmental impact in the use and maintenance and end of life stages. The endpoint approach shows more interpretable results, enabling an easier comparison between different stages and solutions. The results show the importance of considering the whole life-cycle, since a better design reduces the global environmental impact despite a higher environmental impact in the manufacturing stage.

Keywords:

sustainabilityenvironmental impactlife-cycle assessmentconstruction LCAbridge LCAReCiPe;sustainable construction

Reference:

PENADÉS-PLÀ, V.; MARTÍ, J.V.; GARCÍA-SEGURA, T.;  YEPES, V. (2017). Life-cycle assessment: A comparison between two optimal post-tensioned concrete box-girder road bridges. Sustainability, 9(10):1864. doi:10.3390/su9101864 (link)

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Sustainable assessment of retaining walls through an active learning method considering multiple stakeholders

ABSTRACT: The sustainability approach has changed the modern society. Currently, the sustainability takes into consideration, not only the economic and environmental facets, but also the social facet. Taking into account the three facets of sustainability, this paper shows the application of a method of active learning to assess the sustainability of three real retaining walls. A group of 29 students of the Master of Science in Planning and Management in Civil Engineering at the Universitat Politècnica de València has experienced this assessment. The method followed was proposed by academics of the School of Civil Engineering of the Universitat Politècnica de València (Spain) and Universidad de La Frontera (Chile). An approach multi-criteria and a clusters analysis are part of method, which allows developing a participative process with different points of view about the sustainability. The outcomes show that of this way students can forecast impacts from of the integration of design, planning and the location context of the infrastructure. Result evidence that personal values of each student influences the election of the optimal alternative. The paper also identifies the need to strengthen the conceptualization of social criteria in the students training.

KEYWORDS: Infrastructure, Education, Cluster analysis, Analytic hierarchy process, Civil engineering, Sustainability

REFERENCE:

SIERRA-VARELA, L.; YEPES, V.; PELLICER, E. (2017). Sustainable assessment of retaining walls through an active learning method considering multiple stakeholders. Proceedings of the Ninth International Structural Engineering and Construction Conference, Valencia, Spain, July 24-July 29.  doi: 10.14455/ISEC.res.2017.51

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Special Issue “Sustainable Construction”

High visibility: indexed by the Science Citation Index Expanded, the Social Sciences Citation Index (Web of Science) and other databases. Impact Factor: 1.343 (2015)

Special Issue “Sustainable Construction”

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section “Sustainable Engineering and Science“.

Deadline for manuscript submissions: 30 November 2017

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. Tatiana García-Segura
Concrete Science and Technology Institute (ICITECH), Department of Construction Engineering and Civil Engineering Projects, Universitat Politècnica de València Valencia, Spain
Interests: multi-objective optimization; durability; safety; sustainability; post-tensioned bridges; maintenance; blended cement; recycled concrete

Special Issue Information

Dear Colleagues,

This “Sustainable Construction” Special Issue comprises selected papers for Sustainability. Construction is one of the main sectors generating greenhouse gases. This industry consumes large amounts of raw materials, such as stone, timber, water, etc. Additionally, infrastructure should provide service over many years without safety problems. Therefore, their correct design, construction, maintenance and dismantling are essential to reduce economic, environmental and societal consequences. That is why promoting sustainable construction is becoming extremely important nowadays. This Special Issue is seeking papers that explore new ways of reducing the environmental impacts caused by the construction sector, as well promoting social progress and economic growth. These objectives include, but are not limited to:

  • The use of sustainable materials in construction
  • The development of technologies and processes intended to improve sustainability in construction
  • The optimization of designs based on sustainable indicators
  • The reduction of the economic, environmental and social impact caused by production processes
  • The promotion of durable materials that reduce the future maintenance
  • The life-cycle assessment
  • Decision-making processes that integrate economic, social, and environmental aspects

Papers selected for this Special Issue are 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. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as 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 refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed Open Access monthly journal published by MDPI.

Keywords

  • sustainable materials
  • life-cycle assessment
  • sustainable and efficient technologies and processes
  • design optimization
  • durable materials
  • maintenance minimization
  • decision-making

Sostenibilidad del mantenimiento de carreteras bajo presupuestos restrictivos

Foto: laseda.accionistas.es

¿Es posible un mantenimiento sostenible de las carreteras cuando apenas existen presupuestos para ello?

A continuación os dejo el enlace a un artículo científico que nos acaban de publicar donde se muestra la posibilidad de utilizar técnicas de optimización heurística para conseguirlo.

 

 

 

 

 

Puedes solicitar una copia gratuita de este artículo en la siguiente dirección: https://www.researchgate.net/publication/312598336_Towards_a_sustainable_optimization_of_pavement_maintenance_programs_under_budgetary_restrictions

 

Referencia: 

TORRES-MACHI, C.; PELLICER, E.; YEPES, V.; CHAMORRO, A. (2017). Towards a sustainable optimization of pavement maintenance programs under budgetary restrictions. Journal of Cleaner Production, 148:90-102. http://www.sciencedirect.com/science/article/pii/S0959652617301142

Abstract:

Transport sector constitutes the second largest source of global greenhouse gas (GHG) emissions, being the road transportation the main contributor of these emissions. Efforts in the road sector have traditionally focused on vehicle emissions and infrastructure is typically not included in the emissions account. Road environmental impact is estimated to increase by 10% if the stages of road design, construction, and operation were considered. Previous literature has widely study sustainable practices in pavement design and construction, with little attention paid to maintenance. Current state of practice reveals that pavement managers barely consider environmental performance and their evaluations solely rely on technical and economic criteria. This situation creates the need to incorporate, in an integrated manner, technical, economic, and environmental aspects in the design of maintenance programs. The main objective of this research is to develop a tool for the optimal design of sustainable maintenance programs. Given a maintenance budget, the tool aims to maximize the long-term effectiveness of the network while minimizing GHG emissions derived from the application of maintenance treatments. The capability of the proposed tool is analyzed in a case study dealing with an urban pavement network. In comparison to the traditional maintenance policy, the proposed tool designs maintenance programs that increase the average network condition by up to 22% and reduces GHG emissions by 12%. This application also analyzes the effect of different budgetary scenarios in the technical and environmental performance of the network. This application helps pavement managers in the trade-off between budget and network performance.

Keywords:

  • Greenhouse gas emissions;
  • Long-term effectiveness;
  • Optimization;
  • Sustainability;
  • Pavement management;
  • Sensitivity analysis