Relatórios

Este relatório apresenta uma avaliação preliminar do programa GeotomCG (paraprocessamento de tomografia sísmica), incluindo os resultados obtidos com este programa emdiversas aplicações efectuadas.

This report concerns the cloister of Santa Clara-a-Nova Monatery, Coimbra, used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that it is necessary to solve the infiltrations of water from the rain, by repairing the roof of the cloister building and to replace the damaged cement-based render. Renders of low capillary absorption or low water vapour permeability, which may amplify the effects of the capillary rise, should be avoided. A transporting render is adequate.

This report concerns São Sebastião Church, Almada, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that capillary is probably the main source of moisture and nitrates the main type of salt (although chlorides were also detected). The high damage state of the lime-mortars seems to be due, in a great extent, to their low mechanical resistance and very high absorption. The new plasters and renders should prevent crystallization from occurring inside the weak substrate lime-mortars, which easily deteriorate.

This report concerns Alhos-Vedros tide-mill, Moita, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that, in the ground floor, plaster damage is due to the simultaneous presence of moisture and salts. Capillary rise and leakage from the cover roof and window frames are two obvious origins of moisture. Water vapour condensation is also a possible source of moisture but the knowledge of its relevance requires further testing.

This report concerns the cloister of Santa Clara-a-Nova Monatery, Coimbra, used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that measures should be taken for trying to lower the amount of moisture reaching the base of the walls, namely to improve the drainage of the cloister garden and to prevent the excessive use of water in cleaning operations. The damaged cement-based render should be replaced. Renders of low capillary absorption or low water vapour permeability, which may amplify the effects of the capillary rise, should be avoided. A transporting render is adequate.

This report concerns Salvas Chapel, Sines, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that capillary rise is probably the main source of moisture. Further research seems necessary to detect the origin of the rising damp (superficial draining water or phreatic water). Measures to reduce the capillary rise should be taken, according to the results of this research.

A caracterização da ação sísmica, para efeitos de projeto e verificação de segurança das estruturas de engenharia civil, é realizada para valores de intensidade sísmica elevados quando comparados com os valores de intensidade sísmica sentidos frequentemente. Tais valores elevados são compatíveis com os níveis de segurança exigidos para as estruturas, que usualmente são considerados implícitos nas regras de dimensionamento e verificação de segurança de estruturas contempladas nos códigos em vigor.

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