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- Análise crítica ao método P-δ simplificado proposto pelo MC90Publication . Vinagre, JoãoNeste artigo procede-se à análise e discussão do método simplificado de avaliação dos efeitos de 2ª ordem em elementos comprimidos inseridos em estruturas de edifícios correntes, preconizado pelo Model Code 90 CEB-FIP.
- Modelação do comportamento mecânico em compressão de rochas granulares baseada em ensaios não destrutivos e quasi não destrutivosPublication . Ludovico-Marques, Marco; Chastre, Carlos; Vasconcelos, G.No património edificado português as rochas granulares assumem importância relevante nos elementos construtivos presentes no património histórico e cultural, nomeadamente as pedras graníticas e areníticas. Tendo por objectivo a avaliação do comportamento mecânico de rochas granulares presentes no património edificado histórico foi realizado um estudo de investigação experimental sobre amostras dos litótipos seleccionados e que são representativos de rochas presentes no próprio edificado, em termos de propriedades petrográficas, físicas e mecânicas. Neste artigo apresenta-se um modelo analítico definido com base em ensaios experimentais que permite efectuar a simulação do comportamento das rochas em compressão uniaxial (diagramas de tensão-deformação), função de propriedades físicas e mecânicas obtidas através de ensaios não destrutivos e quasi não destrutivos. Este modelo permite desta forma a avaliação do comportamento mecânico de rochas granulares sem afectar a integridade do património histórico.
- Modelling the compressive mechanical behaviour of granite and sandstone historical building stonesPublication . Ludovico-Marques, Marco; Chastre, Carlos; Vasconcelos, Graça
- Effect of salt crystallization ageing on the compressive behavior of sandstone blocks in historical buildingsPublication . Ludovico-Marques, Marco; Chastre, Carlos
- Seismic retrofitting solution of an adobe masonry wallPublication . Figueiredo, A.; Varum, H.; Costa, D.; Oliveira, Cristina
- Effect of consolidation treatments on mechanical behaviour of sandstonePublication . Ludovico-Marques, Marco; Chastre, Carlos
- Application of fuzzy inference system for determining weathering degree of some monument stones in IranPublication . Heidari, Mojtaba; Chastre, Carlos; Torabi-Kaveh, Mehdi; Ludovico-Marques, Marco; Mohseni, Hassan
- Determination of weathering degree of the Persepolis stone under laboratory and natural conditions using fuzzy inference systemPublication . Heidari, Mojtaba; Torabi-Kaveh, Mehdi; Chastre, Carlos; Ludovico-Marques, Marco; Mohseni, Hassan; Akefi, Hossein
- Rehabilitation of an industrial water main using multicriteria decision analysisPublication . Carriço, Nelson; Covas, Dídia; Almeida, Maria do CéuThis paper demonstrates the application of multicriteria decision analysis (MCDA) method- ology in a real case study aiming to choose the best rehabilitation intervention of an industrial water main. This methodology is composed of three main stages: problem identification, structuring, and evaluation. Problem structuring, a crucial stage for the outcomes, includes identifying objec- tives, selecting scenarios within the analysis period, defining problem alternatives, and defining the problematic type. Problem evaluation includes the selection of assessment metrics, selection of the aggregation method, application of the method, and a sensitivity and robustness analysis. Two scenarios, nine assessment metrics, and seven alternatives are established, and two ranking methods (the additive model and ELECTRE III method) are used to compare the alternatives. The results show that the best solution corresponds to building a new pipe and deactivating the existing one, as it significantly reduces the pipe failure risk and O&M costs, whereas the worst solution is always the status quo case, since it is the only alternative that does not improve the system performance, independently of the ranking method and the analyzed scenario
- Optimal number of pressure sensors for real-time monitoring of distribution networks by using the hypervolume indicatorPublication . Ferreira, Bruno; Carriço, Nelson; Covas, DídiaThis article proposes a novel methodology to determine the optimal number of pressure sensors for the real-time monitoring of water distribution networks based on a quality hypervolume indicator. The proposed methodology solves the optimization problem for different numbers of pressure sensors, assesses the gain of installing each set of sensors by means of the hypervolume indicator and determines the optimal number of sensors by the variation of the hypervolume indicator. The methodology was applied to a real case study. Several robustness analyses were carried out. The results demonstrate that the methodology is hardly influenced by the method parameters and that a reasonable estimation of the optimal number of sensors can be easily achieved.
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