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Search Results By Etiquetas: life-cycle


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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18 octubre, 2017
 
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Study of criteria used to obtain a sustainable bridge

Abstract. The sustainable development of bridges is mainly based on meeting the three pillars of sustainability (economic, social and environmental factors) which have different goals. Each main criterion groups a large number of subcritera. Therefore, achieve a sustainable bridge is a complicate problem that involves a high number of factors in each stage of bridge life-cycle. For this reason, decision-making is a helpful process to solve the sustainability problem. The objective of this work is to review the bridge life-cycle decision-making problems that involve criteria that represent the pillars of the sustainability. While some works only consider criteria related to one or two of these pillars, the most current works consider criteria that involve all the pillars of sustainability. Furthermore, most of the works reviewed only study one stage of bridge life-cycle. This study shows the criteria used in some revised journal articles in each bridge life-cycle phase and, the multi-attribute decision-making used to achieve the sustainability. In addition, a small explanation of the obtained information will be carried out.

Keywords: Multi-criteria, Life-cycle, Decision-making, MCDM, MADM

Reference:

PENADÉS, V.; YEPES, V.; GARCÍA-SEGURA, T.; MARTÍ, J.V. (2017). Study of criteria used to obtain a sustainable bridge. Proceedings of the Ninth International Structural Engineering and Construction Conference, Valencia, Spain, July 24-July 29.    doi: 10.14455/ISEC.res.2017.177

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25 julio, 2017
 
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Aplicación de los métodos de decisión multicriterio al diseño sostenible de puentes

Puente en cajón postesado sobre el Turia (Quart de Poblet). Proyectado por Javier Manterola y construído por Dragados y Construcciones en 1991.

Actualmente existe una tendencia clara hacia la sostenibilidad en los proyectos de estructuras, para lo cual es necesario equilibrar los criterios que apoyan esta sostenibilidad: la economía, el medio ambiente y la sociedad. Estos pilares básicos presentan objetivos diferentes y habitualmente enfrentados entre sí. Esta realidad conduce hacia la necesidad de adoptar procesos de toma de decisiones que permitan alumbrar soluciones capaces de satisfacer, de la mejor manera posible, los principios de sostenibilidad citados. Los puentes forman parte de las infraestructuras básicas de comunicación entre los distintos territorios. Por lo tanto, constituye una necesidad ineludible garantizar la sostenibilidad de este tipo de estructuras a lo largo de su ciclo de vida.

A continuación se presenta un artículo recién publicado que tiene como objetivo principal revisar la aplicación de las técnicas de decisión multicriterio al caso de los puentes. Esta investigación se enmarca dentro del proyecto BRIDLIFE (BIA2014-56574-R), en el cual participan los autores. La revisión se ha realizado atendiendo a las fases del ciclo de vida del puente, teniendo en cuenta aquellos trabajos que proponen soluciones y realizan un proceso directo de toma de decisiones respecto a estas soluciones. Asimismo, también se han considerado aquellas aportaciones que, a pesar de no realizar una selección entre varias soluciones, aplican un método de toma de decisiones para evaluar una solución en particular. La relevancia de estos trabajos estriba en la forma en que se realizan los procesos de evaluación, los cuales constituyen la piedra angular para el proyecto de un puente desde el punto de vista de la sostenibilidad, atendiendo a todas y cada una de las fases de su ciclo de vida.

Este artículo lo podéis descargar en el siguiente enlace: http://www.mdpi.com/2071-1050/8/12/1295, aunque también os lo dejo en el post para vuestra descarga directa.

Referencia:

Penadés-Plà, V.; García-Segura, T.; Martí, J.V.; Yepes, V. A Review of Multi-Criteria Decision-Making Methods Applied to the Sustainable Bridge Design. Sustainability 2016, 8, 1295.

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9 diciembre, 2016
 
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Social Sustainability in the Lifecycle of Chilean Public Infrastructure

Esta es la versión post-print de autor. La publicación se encuentra en: https://riunet.upv.es/handle/10251/48904, siendo el Copyright de la American Society of Civil Engineers.

El artículo debe ser citado de la siguiente forma:

Sierra, LA.; Pellicer, E.; Yepes, V. (2016). Social Sustainability in the Lifecycle of Chilean Public Infrastructure. Journal of Construction Engineering and Management, 142(5):05015020-1-05015020-13. doi:10.1061/(ASCE)CO.1943-7862.0001099.

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Developing learning manuals for European construction project managers

Maturity model in management competences

Maturity model in management competences (Milosevic et al, 2007)

There is a need for supplementary learning and training in management applied to the construction industry, as many authors, professionals and organisations have already recognised. The assessment and up-keeping of management competencies are essential for the performance of individuals and organisations that work in the construction sector. Most of the universities syllabuses focus in traditional construction courses that do not deal with the most relevant features of management for engineers and architects in the construction industry; these graduate courses mainly cover an assortment of design-oriented issues, leaving no room for managerial topics. Thus, management is a crucial issue for professionals in the construction sector; currently, an engineer or an architect must have some knowledge of every managerial issue valuable in construction. Taking the complete life cycle of the infrastructure as a reference, a holistic attitude must be pursued. Therefore, a model for management and administration in construction is proposed in this paper. This model displays two dimensions: life cycle (per phase) and organisational level. The former is linked to time through the four well-known phases of the construction process: feasibility, design, construction and operation. The latter considers four organisational levels that can be found in the construction sector: life cycle, company, project (or team) and individual. In order to test the appropriateness and usefulness of the model, two applications are implemented. The first one is the analysis of the outputs of a European project which goal was to produce seven basic books for construction managers; this project was developed by several universities and professional associations of the European Union. The second one is the design of a new syllabus in civil engineering (M.Sc. degree) with a specialisation of 30 ECTS; right now, this proposal is being discussed in the School of Civil Engineering at the Universidad Politécnica de Valencia (Spain) to get it implemented in 2010 due to the new academic scenario according to the Bologna process. The model presented in this paper offers an innovative framework for orientation to organisations, professionals and academicians in order to improve the knowledge of management and administration in the construction industry.

Reference:

PELLICER, E.; YEPES, V.; TEIXEIRA, J.C.; CATALÁ; J. (2009). Developing learning manuals for European construction project managers, in Gómez, L.; Martí, D; Candel I. (eds.): Proceedings of International Conference on Education and New Learning Technologies, EDULEARN 09, pp. 2374-2384. 6-8 July, Barcelona, Spain. ISBN: 978-84-612-9802-0. (link)

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30 marzo, 2016
 
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Life cycle greenhouse gas emissions of blended cement concrete including carbonation and durability

Esta es la versión post-print de autor. La publicación se encuentra en: https://riunet.upv.es/handle/10251/49057, siendo el Copyright de Springer Verlag (Germany).

El artículo debe ser citado de la siguiente forma:

GARCÍA-SEGURA, T.; YEPES, V.; ALCALÁ, J. (2014). Life-cycle greenhouse gas emissions of blended cement concrete including carbonation and durability. The International Journal of Life Cycle Assessment, 19(1):3-12. DOI 10.1007/s11367-013-0614-0

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27 mayo, 2015
 
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Universidad Politécnica de Valencia