Optimizing the strengthening and reinforcement of concrete beams by the use of CFRP filament winding

• Type: Article in International Conference Proceedings Book
• Date: 2003

Authors

P. Vieira (Author) FEUP; J. L. Esteves (Author) FEUP; A. T. Marques (Author) FEUP

Conference proceedings International

Title: ICCM-14 International Conference on Composite Materials

ICCM-14 International Conference on Composite Materials

San Diego, California, USA, 14 to 18 July 2003

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences

Other information

Abstract (EN): For the flexural strengthening of reinforced concrete elements an innovative technique, based in the filament winding method and using carbon fibres and epoxy resin, has been developed. Increases in static, dynamic, impact loading, as well as increased seismic activity, whenever design errors have been made or structures ageing prematurely, are a few of the reasons why it is necessary to make the rehabilitation and strengthening of concrete structures. New techniques are emerging as an alternative to steel plate bonding. One of which involves strengthening existing concrete structures with externally bonded of pre-manufactured FRP composite materials plates, or as unidirectional carbon tissues to be impregnated and cured in-situ, for flexural strengthening and, occasionally, for improvements in shear capacity. The application of the filament winding technique for this purpose provides an interesting improvement in flexural, compression and shear capacity of concrete beam elements. To study the application of the winding process for the rehabilitation and strengthening of concrete structures, an experimental research programme and a numerical finite elements method analysis¿s has been done bearing in mind the strengthening of scale-reduced beams. The study of winding parameters to optimize the CFRP reinforcing system has been able when tested in three and four points bending to increase more than the double of the ultimate load of the concrete beam, providing a large deflection as well. The strengthening process will be described.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9