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A platform for research: civil engineering, architecture and urbanism
Carbon fibre reinforced plastic (CFRP) reinforced centrifugally cast high strength concrete
Solutions for replacing conventional and prestressed steel reinforcement of centrifugally cast concrete poles were studied in a four year research program. The main goal of this study was to investigate the production and behaviour of Carbon Fibre Reinforced Plastic (CFRP) reinforced and prestressed centrifugally cast high strength concrete poles. These poles are capable of competing with steel poles in terms of their mechanical qualities and weight, having in addition an outstanding corrosion resistance. Possible applications would be classical poles for supporting electric lines, traffic signals and lighting devices. The novel design of the poles included the use of CFRP as shear reinforcement to replace conventional steel wire spirals. Filament wound CFRP grids, loosely braided carbon fibre sleeves and thermoplastic matrix CFRP tapes in a spiral shape were considered. Prestressed steel was substituted by thin, high strength CFRP rods produced by the pultrusion process. The surface of the CFRP rods was coated to increase the bond action between the high strength concrete and the rod. A method for producing slender pipe cross sections by pretensioning several thin CFRP rods against a spinning mould and compacting the concrete by centrifugal casting was developed. Initial experiments were carried out to study the basic behaviour of the high strength spun concrete (fc = 120 MPa) and of the CFRP shear and CFRP prestressed reinforcements. The short and long time static behaviour of novel CFRP reinforcing elements was then characterised by means of torsional, bending and compressive tests of reinforced and prestressed high strength spun concrete pipe sections. In the analytical part of the study models for the static design of the pipe cross sections were formulated and the effect of environmental influences was considered.
Carbon fibre reinforced plastic (CFRP) reinforced centrifugally cast high strength concrete
Solutions for replacing conventional and prestressed steel reinforcement of centrifugally cast concrete poles were studied in a four year research program. The main goal of this study was to investigate the production and behaviour of Carbon Fibre Reinforced Plastic (CFRP) reinforced and prestressed centrifugally cast high strength concrete poles. These poles are capable of competing with steel poles in terms of their mechanical qualities and weight, having in addition an outstanding corrosion resistance. Possible applications would be classical poles for supporting electric lines, traffic signals and lighting devices. The novel design of the poles included the use of CFRP as shear reinforcement to replace conventional steel wire spirals. Filament wound CFRP grids, loosely braided carbon fibre sleeves and thermoplastic matrix CFRP tapes in a spiral shape were considered. Prestressed steel was substituted by thin, high strength CFRP rods produced by the pultrusion process. The surface of the CFRP rods was coated to increase the bond action between the high strength concrete and the rod. A method for producing slender pipe cross sections by pretensioning several thin CFRP rods against a spinning mould and compacting the concrete by centrifugal casting was developed. Initial experiments were carried out to study the basic behaviour of the high strength spun concrete (fc = 120 MPa) and of the CFRP shear and CFRP prestressed reinforcements. The short and long time static behaviour of novel CFRP reinforcing elements was then characterised by means of torsional, bending and compressive tests of reinforced and prestressed high strength spun concrete pipe sections. In the analytical part of the study models for the static design of the pipe cross sections were formulated and the effect of environmental influences was considered.
Carbon fibre reinforced plastic (CFRP) reinforced centrifugally cast high strength concrete
Kohlenstoffaserverstärkte Plaste (CFRP) zur Verstärkung von hochfestem Schleuderbeton
Terrasi, G.P. (author) / Meier, U. (author)
Techtextil Symposium, 1998 ; 1 ; 185-191
1998
7 Seiten, 5 Bilder, 2 Tabellen, 9 Quellen
Conference paper
English
Carbon Fibre Reinforced Plastic (CFRP) Reinforced Centrifugally Cast High Strength Concrete
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