Long-term Test Arrangement for Externally Strengthened Reinforced Concrete Elements

Long-term Test Arrangement for Externally Strengthened Reinforced Concrete Elements

Peer-reviewed article not indexed in WoS or Scopus

Methods for external strengthening of concrete use elements of very high tensional strength glued onto its tensioned surface. These elements may be of metal, carbon fibres (CFRP), glass or others, usually having very good mechanical properties. However, these high-strength elements aare normally attached to concrete by exposy resins. Exposy resins have a low Young´s modulus and therefore a higher rate of creep may have an influence on the long-term behaviour of such external strengthening. In order to verify this idea experimentally a special space-saving arrangement of tests is describe in this paper. Panels act as loaded beams but simultaneously as a load for the other panels in a stand. The different load magnitude acting on a different layer of panels should make it possible to study the long-term influence of the degree of shear force on the glue creep. Certainly, the glue creep may be dependent on the type of epoxy resin; therefore several epoxy resin types are included in the tests.

Methods for external strengthening of concrete use elements of very high tensional strength glued onto its tensioned surface. These elements may be of metal, carbon fibres (CFRP), glass or others, usually having very good mechanical properties. However, these high-strength elements aare normally attached to concrete by exposy resins. Exposy resins have a low Young´s modulus and therefore a higher rate of creep may have an influence on the long-term behaviour of such external strengthening. In order to verify this idea experimentally a special space-saving arrangement of tests is describe in this paper. Panels act as loaded beams but simultaneously as a load for the other panels in a stand. The different load magnitude acting on a different layer of panels should make it possible to study the long-term influence of the degree of shear force on the glue creep. Certainly, the glue creep may be dependent on the type of epoxy resin; therefore several epoxy resin types are included in the tests.

carbon fiber (CFRP), glas fiber (GFRP), external strengthening, epoxy-resin creep, test arrangement

carbon fiber (CFRP), glas fiber (GFRP), external strengthening, epoxy-resin creep, test arrangement

VAŇURA, T., ŠVAŘÍČKOVÁ, I., ADÁMEK, J.

01.11.2003

The Czech Technical University in Prague

Praha

Acta Polytechnica

4/2003

1210-2709

Acta Polytechnica

2003

4

Czech Republic

27

29

3