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Proceedings Paper

Smart CFRP systems for the controlled retrofitting of reinforced concrete members
Author(s): M.-B. Schaller; S. Käseberg; M. Kuhne
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Paper Abstract

During the last ten years an increasing amount of Carbon Fiber Reinforced Polymer (CFRP) applications to rehabilitate damaged concrete elements was observed. Thereby some important disadvantages of the brittle materials must be considered, for example the low ductility of the bond between CFRP and concrete and brittle failure of FRP. With embedded sensor systems it is possible to measure crack propagation and strains. In this paper a sensor based CFRP system will be presented, that can be used for strengthening and measuring. The used optical fibers with Fiber Bragg Gratings (FBG) have a large number of advantages in opposite to electrical measuring methods. Examples are small dimensions, low weight as well as high static and dynamic resolution of measured values. The main problem during the investigations was the fixing of the glass fiber and the small FBG at the designated position. In this paper the possibility of setting the glass fiber with embroidery at the reinforcing fiber material will be presented. On the basis of four point bending tests on beams (dimensions of 700 x 150 x 150 mm) and tests on wrapped columns the potential of the Smart CFRP system is introduced.

Paper Details

Date Published: 8 September 2010
PDF: 8 pages
Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76533C (8 September 2010); doi: 10.1117/12.864936
Show Author Affiliations
M.-B. Schaller, Gesellschaft für Geomechanik und Baumeßtechnik mbH (Germany)
S. Käseberg, Hochschule für Technik, Wirtschaft und Kultur Leipzig (Germany)
M. Kuhne, Bauhaus Univ. Weimar (Germany)

Published in SPIE Proceedings Vol. 7653:
Fourth European Workshop on Optical Fibre Sensors
José Luís Santos; Brian Culshaw; José Miguel López-Higuera; William N. MacPherson, Editor(s)

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