Materiales de Construcción, Vol 66, No 322 (2016)

Comparison of PZT and FBG sensing technologies for debonding detection on reinforced concrete beams strengthened with external CFRP strips subjected to bending loads


https://doi.org/10.3989/mc.2016.05415

E. Sevillano
Department of Structural Mechanics. Technical University of Madrid, Spain

R. Sun
Department of Structural Mechanics. Technical University of Madrid, Spain

R. Perera
Department of Structural Mechanics. Technical University of Madrid, Spain

A. Arteaga
Eduardo Torroja Institute for Construction Science, IETcc-CSIC, Spain

A. de Diego
Eduardo Torroja Institute for Construction Science, IETcc-CSIC, Spain

D. Cisneros
Eduardo Torroja Institute for Construction Science, IETcc-CSIC, Spain

Abstract


The development of monitoring technologies particularly suitable to be used with novel CFRP strengthening techniques has gained great attention in recent years. However, in spite of the high performance of these advanced composite materials in the strengthening and repairing of structures in service, they are usually associated with brittle and sudden failure mainly caused by debonding phenomena, originated either at the CFRP-plate end or at the intermediate areas in the vicinity of flexural cracks in the RC beam. Thus, it is highly recommended for these structures to be monitored in order to ensure their integrity while in service. Specifically, the feasibility of smart sensing technologies such as Fiber Bragg Grating (FBG) sensors and piezo-impedance transducers (PZT) has been studied. To the knowledge of the authors, none serious study has been carried out until now concerned to the topic of damage detection due to debonding in rehabilitated structures with CFRP composites.

Keywords


Composite; Fibre reinforcement; Concrete; Polymer; Mechanical properties

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