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Composite materials and discrete steel fibres for the strengthening of thin con...

Tese de Doutoramento em Engenharia Civil - Área do Conhecimento Estruturas ; The pre-cured CFRP laminates strips installed according the Near Surface Mounted (NSM) technique can provide a more discrete and efficient solution for strengthening concrete structures in that they are inserted into the concrete cover of the structure to be strengthened via pre-cut slits. The NSM technique for flexural strengthening ...

Efficient strengthening technique to increase the flexural resistance of existi...

Composite materials are being used with notable effectiveness to increase and upgrade the flexural load carrying capacity of reinforced concrete (RC) members. Near-Surface Mounted (NSM) is one of the most promising strengthening techniques, based on the use of carbon fiber-reinforced polymer (CFRP) laminates. According to NSM, the laminates are fixed with epoxy based adhesive into slits opened into the concrete...

Influence of the spacing between NSM-CFRP laminates on the flexural strengtheni...

Experimental characterization of a new reinforced brick masonry shell structura...

The main aim of the current paper is to describe the experimental research carried out at the University of Minho, Portugal, regarding the development of an innovative reinforced brick masonry shell structural system. The concept of the system is based on the work of the engineer Eladio Dieste, and focuses on the prefabrication industry. The structural system is composed of a layer of clay bricks, reinforced co...

Composite materials for the structural strengthening of reinforced masonry shells

Since the 1950s, the Uruguayan engineer Eladio Dieste designed curved lightweight masonry shells of impressive span width, complex shape and high attractiveness. This structural system is composed of a top mortar cover, a layer of clay bricks, mortar joints, and steel reinforcement. For the permanent loads, this structural system has been working satisfactory, in spite of rebar corrosion being detected in some ...

Efficient strengthening technique for reinforced concrete slabs

A promising strengthening strategy, using carbon fiber reinforced polymer (CFRP) materials, consists in applying CFRP laminate strips into pre-cut slits opened in the concrete cover of the elements to strengthen. This strengthening technique is designated by Near Surface Mounted (NSM) and has been successfully used to increase the flexural and the shear resistance of concrete and masonry structures. The present...

Sistema híbrido em materiais compósitos para reforço de lajes de betão armado

O desempenho em termos de aumento da resistência à flexão da técnica de reforço que combina laminados de CFRP à tracção com camada de compressão em betão reforçado com fibras de aço (BRFA), foi avaliado experimentalmente, efectuando-se ensaios em faixas de lajes maciças sem reforço (controlo), reforçadas apenas com laminados de CFRP, e duplamente reforçadas com laminados de CFRP e camada de BRFA. Os resultados ...

Flexural behavior of reinforced masonry panels

A new industrialized solution for construction of reinforced brick masonry shell roofs was recently developed. Here, the influence of both the brick and reinforcement arrangements on the flexural behavior of this structural system is analyzed by carrying out four-point bending tests with reinforced masonry panels. The panel positive flexural resistance (concrete cover layer in compression) was about two times i...

Sistema híbrido em materiais compósitos para reforço de lajes de betão armado

Está duplicado com o 5988! ; O desempenho em termos de aumento da resistência à flexão da técnica de reforço que combina laminados de CFRP à tracção com camada de compressão em betão reforçado com fibras de aço (BRFA), foi avaliado experimentalmente, efectuando-se ensaios em faixas de lajes maciças sem reforço (controlo), reforçadas apenas com laminados de CFRP, e duplamente reforçadas com laminados de CFRP e ...

Efficient strengthening technique to increase the flexural resistance of existi...

Technical report 09-DEC/E-06