18 documents found, page 1 of 2
The use of ultrasonic echo pulse velocity as an NDT method to predict the concr...
Abreu Filho, Marco Antonio; Moreno, Carlos; Luso, EduardaThe ultrasonic approach is one of the non-destructive testing methods that most technologically progressed in past few years. This study aims to validate the accuracy and capabilities of this method in the mechanical characterization of concrete elements, by using an ultrasonic tomography equipment based in echo pulse velocity (S-waves). The elastic modulus and compressive strength of concrete are estimated fro...
A utilização de equipamento ultrassónico na caracterização mecânica de elemento...
Abreu Filho, Marco Antonio; Luso, Eduarda; Moreno, CarlosDevido à grande importância do betão e do betão armado na construção civil, o mercado e a indústria tiveram a necessidade, técnica e econômica, de desenvolver e aprimorar técnicas e ensaios para caracterização do mesmo. Os tipos de ensaios podem ser divididos entre os destrutivos, que inutilizam totalmente ou parcialmente a peça ou o elemento objeto de estudo, e os não destrutivos, que não geram danos, ou geram...
Application of eurocodes 0 and 1 - comparison with sia 260 and 261 swiss standards
Branco, Ricardo; Moreno, Carlos; Ferreira, DéboraThe structural safety is one of the most important issues in construction. In order to ensure this safety there is a need to provide the appropriate carrying capacity to the structure. One of the initial stages of the design process is the quantification and combination of the different actions. Eurocodes 0 and 1 (EN 1990, EN 1991) are concerned by defining the basis of structural design and the actions that sh...
Strengthening slabs for punching shear using fibre reinforced polymer
Moreno, Carlos; Ferreira, Débora; Sarmento, AnaPunching is generally associated to the application of concentrated loads or to the presence of columns. One of the main concerns related to flat slabs is its punching shear capacity at slab‐column connection, which is subjected to a very complex three‐dimensional stress state. Provided that bending capacity is installed, punching shear failure is characterized by the development of a truncated cone shaped surf...
Punching shear strengthening of flat slabs: CFRP and shear reinforcement
Moreno, Carlos; Ferreira, Débora; Bennani, Abdelkrim; Sarmento, Ana; Noverraz, MichelPunching in slabs is usually associated to the application of concentrated loads or to the presence of columns. One of the main concerns related to flat slabs is its punching shear capacity at slabcolumn connection, which is subjected to a very complex three-dimensional stress state. Provided that bending capacity is installed, punching shear failure is hence characterized by the development of a truncated cone...
Punching shear strengthening of flat slabs: CFRP and shear reinforcement
Moreno, Carlos; Ferreira, Débora; Bennani, Abdelkrim; Sarmento, Ana; Noverraz, MichelPunching in slabs is usually associated to the application of concentrated loads or to the presence of columns. One of the main concerns related to flat slabs is its punching shear capacity at slabcolumn connection, which is subjected to a very complex three-dimensional stress state. Provided that bending capacity is installed, punching shear failure is hence characterized by the development of a truncated cone...
Anestesia para um doente sem dor
Carvalho, Joana Chaves; Neves, Inês; Moreno, Carlos; Vargas, SusanaA insensibilidade congénita à dor e anidrose ou neuropatia hereditária sensorial e autonómica tipo IV é uma doença autossómica recessiva rara caracterizada pela inexistência de aferentes nociceptivos não mielinizados e de inervação das glândulas sudoríparas. A insensibilidade dos indivíduos portadores desta patologia aos estímulos dolorosos condiciona o desenvolvimento de lesões corporais recorrentes que result...
Aplicação dos eurocódigos 0 e 1 – análise comparativa com as congéneres SIA 260...
Ferreira, Débora; Moreno, Carlos; Branco, RicardoOs Eurocódigos 0 e 1 (EN 1990, EN 1991), que substituíram o Regulamento de Segurança e Ações para Estruturas de Edifícios e Pontes (RSAEEP) na quantificação das principais ações a que uma estrutura está sujeita, proporcionaram a uniformização das metodologias de verificação e dimensionamento estrutural a nível da União Europeia. A Suíça é um dos poucos países europeus que continua a seguir normas de dimensionam...
Punching shear analysis of slab-column connections
Moreno, Carlos; Sarmento, Ana MariaThe paper aims to present an experimental testing program regarding reinforced concrete slabs, with and without shear reinforcement, submitted to punching under both symmetric and eccentric loading. Comparisons between numerical simulations and experimental behaviour results are carried on. The capabilities and limitations of the numerical model to reproduce the brittle punching-shear failure are discussed. The...
Bioclimatic solutions existing in vernacular architecture. Rehabilitation techn...
Ferreira, Débora; Luso, Eduarda; Fernandes, Sílvia; Vaz, António Jorge Ferreira; Moreno, Carlos; Correia, RafaelThe traditional architecture is founded as a defining element of the identity of a region, and its essence should be preserved and conserved by means of maintenance and recovery actions. Thus, the best solutions and proposals for intervention should be looked for but this doesn’t imply a back to back innovation and at construction progress. This work includes the description of techniques for maintenance and co...