REVISING A GEODESY AND CARTOGRAPHY ENGINEERING CURRICULUM. Castro, M., Iglesias, L., Rodríguez-Solano, R., Sánchez J. A. International Journal of Engineering Education, 24 (6), 1180-1190. 2008.
Abstract
In the 1990s, a new degree, Geodesic and Cartographic Engineering, was created in Spain. It is a post-graduate degree, lasting two years. At present, Spanish university degrees are being redefined for their adaptation to the European Higher Education Area (EHEA). Thus, after more than ten years of experience and in view of the implementation of the EHEA, it is essential to analyse how well the degree curriculum is adapted to the professional requirements of our graduates in their working lives. A survey of former
students was taken to gather a profile of graduates, job positions and their opinions about the courses they studied. The relationship between the curriculum and the Master's theses written by the students was also examined.
Keywords: Engineering surveying; geodesy; cartography; photogrammetry; mapping; remote sensing; cadastre; curriculum
http://vulcano.caminos.upm.es/
lunes, 21 de febrero de 2011
STRUCTURAL DESIGN OF ASPHALT PAVEMENTS ON CONCRETE BRIDGES
STRUCTURAL DESIGN OF ASPHALT PAVEMENTS ON CONCRETE BRIDGES. Castro, M. Canadian Journal of Civil Engineering, 31 (4), 695-702. 2004.
Abstract
Traditional methods for the structural design of pavement cannot be applied to the design of pavement on bridge decks. In this paper, a new method for the structural design of asphalt pavement on concrete bridge decks is presented. The method can be applied to pavement on girder, slab, and box-girder bridges and can be used whatever the considered degree of bonding between pavement and deck. The method consists of modelling the deck as a two-layer system and then calculating stresses and strains in the pavement–deck system by means of a multilayer system. The proposed methodology has been applied to study the behaviour of asphalt concretes, porous asphalts, and stone matrix asphalts on girder, slab, and box-girder bridges. There is a conclusion of this application that stands out for its practical character. The stone matrix asphalts have the best performance if fatigue is the main concern.
Key words: bridge decks, asphalt pavement, design.
Les méthodes traditionnelles de dimensionnement de revêtements ne peuvent être appliquées à la conception des revêtements bitumineux des tabliers de pont. Cet article présente une nouvelle méthode de dimensionnement de revêtements bitumineux des tabliers de pont en béton. Cette méthode peut s'appliquer aux revêtements des ponts à poutres, des ponts-dalles et des ponts à poutres en caisson. De plus, elle peut être utilisée peu importe le niveau d'adhérence considéré entre le revêtement et le tablier. La méthode consiste en une modélisation du tablier en tant que système bicouche, puis au calcul des tensions et des contraintes sur le système tablier-revêtement en utilisant un système multicouche. La méthodologie proposée a été appliquée à l'étude du comportement des bétons bitumineux, des enrobés drainants et des microbétons bitumineux sur les ponts à poutres, les ponts-dalles et les ponts à poutres en caisson. Une conclusion de cette étude se distingue par sa nature pratique : les revêtements microbétons bitumineux offrent le meilleur rendement si la fatigue constitue la préoccupation principale.
Mots clés : tabliers de pont, revêtements bitumineux, dimensionnement.
http://vulcano.caminos.upm.es/
Abstract
Traditional methods for the structural design of pavement cannot be applied to the design of pavement on bridge decks. In this paper, a new method for the structural design of asphalt pavement on concrete bridge decks is presented. The method can be applied to pavement on girder, slab, and box-girder bridges and can be used whatever the considered degree of bonding between pavement and deck. The method consists of modelling the deck as a two-layer system and then calculating stresses and strains in the pavement–deck system by means of a multilayer system. The proposed methodology has been applied to study the behaviour of asphalt concretes, porous asphalts, and stone matrix asphalts on girder, slab, and box-girder bridges. There is a conclusion of this application that stands out for its practical character. The stone matrix asphalts have the best performance if fatigue is the main concern.
Key words: bridge decks, asphalt pavement, design.
Les méthodes traditionnelles de dimensionnement de revêtements ne peuvent être appliquées à la conception des revêtements bitumineux des tabliers de pont. Cet article présente une nouvelle méthode de dimensionnement de revêtements bitumineux des tabliers de pont en béton. Cette méthode peut s'appliquer aux revêtements des ponts à poutres, des ponts-dalles et des ponts à poutres en caisson. De plus, elle peut être utilisée peu importe le niveau d'adhérence considéré entre le revêtement et le tablier. La méthode consiste en une modélisation du tablier en tant que système bicouche, puis au calcul des tensions et des contraintes sur le système tablier-revêtement en utilisant un système multicouche. La méthodologie proposée a été appliquée à l'étude du comportement des bétons bitumineux, des enrobés drainants et des microbétons bitumineux sur les ponts à poutres, les ponts-dalles et les ponts à poutres en caisson. Une conclusion de cette étude se distingue par sa nature pratique : les revêtements microbétons bitumineux offrent le meilleur rendement si la fatigue constitue la préoccupation principale.
Mots clés : tabliers de pont, revêtements bitumineux, dimensionnement.
http://vulcano.caminos.upm.es/
FATIGUE AND HEALING OF ASPHALT MIXTURES: DISCRIMINATE ANALYSIS OF FATIGUE CURVES
FATIGUE AND HEALING OF ASPHALT MIXTURES: DISCRIMINATE ANALYSIS OF FATIGUE CURVES. Castro, M., Sánchez, J. A. Journal of Transportation Engineering, 132 (2), 168-174. 2006.
Abstract
Fatigue laws obtained by means of laboratory tests do not usually take into account the fact that asphalt mixtures in highways have rest periods (without loads). These rest periods tend to increase the fatigue life of mixtures due to the phenomenon known as healing. A new fatigue test which includes rest periods has been developed. In order to study healing, tests with and without rest have been carried out on asphalt concrete, and the corresponding fatigue curves have been obtained. The test results show an increase of five to ten times fatigue strength. This paper summarizes the main experiences. The testing method used in the research is described. The results are analyzed by means of a statistical technique called discriminate analysis.
Keywords
Asphalt pavements, Mixtures, Fatigue, Laboratory tests
http://vulcano.caminos.upm.es/
Abstract
Fatigue laws obtained by means of laboratory tests do not usually take into account the fact that asphalt mixtures in highways have rest periods (without loads). These rest periods tend to increase the fatigue life of mixtures due to the phenomenon known as healing. A new fatigue test which includes rest periods has been developed. In order to study healing, tests with and without rest have been carried out on asphalt concrete, and the corresponding fatigue curves have been obtained. The test results show an increase of five to ten times fatigue strength. This paper summarizes the main experiences. The testing method used in the research is described. The results are analyzed by means of a statistical technique called discriminate analysis.
Keywords
Asphalt pavements, Mixtures, Fatigue, Laboratory tests
http://vulcano.caminos.upm.es/
viernes, 11 de febrero de 2011
DAMAGE BASED MODEL FOR PREDICTION OF ASPHALT CONCRETE FATIGUE CURVES
DAMAGE BASED MODEL FOR PREDICTION OF ASPHALT CONCRETE FATIGUE CURVES. Castro, M., Sánchez, J. A. Journal of Materials in Civil Engineering, 19 (8), 700-702. 2007.
Abstract
In order to represent the behavior of asphalt concrete mixtures during fatigue tests, a phenomenological model based on the continuous damage theory has been developed. From this model, a method for estimation of fatigue curves was formulated. From a practical point of view, this method could allow us to estimate classic fatigue curves testing a smaller number of specimens. The formulated method was applied to three mixtures, and results were compared with ones from the standard procedure for determining fatigue curves.
Keywords
Abstract
In order to represent the behavior of asphalt concrete mixtures during fatigue tests, a phenomenological model based on the continuous damage theory has been developed. From this model, a method for estimation of fatigue curves was formulated. From a practical point of view, this method could allow us to estimate classic fatigue curves testing a smaller number of specimens. The formulated method was applied to three mixtures, and results were compared with ones from the standard procedure for determining fatigue curves.
Keywords
Fatigue, Damage, Asphalt concrete, Asphalt mixes, Predictions
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