J.
Kolísko
Klokner Institute, Experimental Department, Czech technical University of Prague, CZ
L. Podolka
Department of Structures and Bridges, Faculty of Civil Engineering, Czech technical University of Prague, CZ
Since mid-1990s nonprestressed composites (FRP strips) for strengthening structures have been used throughout world as well as in Czech Republic. Experiences obtained on strengthening structures and during experimental tests provided result that for utilizing material properties of composites and for increasing effectiveness of strengthened structures FRP strips should be used, as that of prestressed reinforcement in the form of reinforcement with no cohesion (loose cables). Due to the safety reasons there is bond in the entire ares in order to avoid mechanical failure FRP strips.
The objective of the investigation described in this paper was to develop a basic set of data required for the application of the strengthening method of bonding prestressed FRP strips as reinforcing elements to the existing reinforced concrete structures. In addition to the investigation aimed at establishing the dimensioning data, the work also focused on technical issues related to the design and execution in order to ensure the practical applicability of the method of externally bonded prestressed FRP strips. Based on the experimental results, a design algorithm for the strengthening was established according to the Czech and EC standard.
References
CSN 73 1201, CSN P ENV 1992-1-1Desing of concrete structures, Part 1 :General rules and rules for buildings.
Klokner Institute, Experimental Department, Czech technical University of Prague, CZ
L. Podolka
Department of Structures and Bridges, Faculty of Civil Engineering, Czech technical University of Prague, CZ
Since mid-1990s nonprestressed composites (FRP strips) for strengthening structures have been used throughout world as well as in Czech Republic. Experiences obtained on strengthening structures and during experimental tests provided result that for utilizing material properties of composites and for increasing effectiveness of strengthened structures FRP strips should be used, as that of prestressed reinforcement in the form of reinforcement with no cohesion (loose cables). Due to the safety reasons there is bond in the entire ares in order to avoid mechanical failure FRP strips.
The objective of the investigation described in this paper was to develop a basic set of data required for the application of the strengthening method of bonding prestressed FRP strips as reinforcing elements to the existing reinforced concrete structures. In addition to the investigation aimed at establishing the dimensioning data, the work also focused on technical issues related to the design and execution in order to ensure the practical applicability of the method of externally bonded prestressed FRP strips. Based on the experimental results, a design algorithm for the strengthening was established according to the Czech and EC standard.
References
CSN 73 1201, CSN P ENV 1992-1-1Desing of concrete structures, Part 1 :General rules and rules for buildings.
CSN
73 2030 Loading tests of building structures
P.Stepanek
and L. Podolka (2001). Strengthening and Repair of RC Structures in the
Czech Republic Using CFRP Strips, Proceeding CICE 2001 International
Conference on FRP Composites in Civil Engineering, December 2001, Hong
Kong, pp. 467-473
Podolka,
L. (2001) Strengthening beams by means of CFK strips, Proceeding
Composites in Construction CCC2001, October 2001, Porto,
pp. 487-492
Podolka,
L. (2001). Strengthening Beams by Means of CFK Strips, In: Acta Polytechnica.
2001, vol. 40, no. 5-6, pp. 2-10
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