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Ensayos de resistencia de pórticos de concreto a escala, reforzados con CFRP en los nudos

Author(s): Andrés Duque | Ingrid Amazo | Daniel Ruiz

Journal: Tecnura
ISSN 0123-921X

Volume: 15;
Issue: 28;
Start page: 83;
Date: 2011;
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Keywords: Laboratory test | Carbon fiber reinforced polymers (CFRP) | External seismic reinforcement.

The results of an experimental study of four scale concrete frames (1:2) subjected to monotonic load are presented. The four frames were designed and constructed without confinement zones in the joints and considering only the gravitational load. Two of the four concrete frames of concrete were reinforced in the joints with a confinement with polymers reinforced with carbon fiber (CFRP). The instrumentation of the tests consisted of a load cell, analogous deformimeters and strain gages in the reinforcement steel bars and in the carbonfibers. According to the experimental results, the reinforcement with fibers duplicates the resistance and the rigidity of the frames and increases its total displacement without loss of resistance in 60%.Also the confinement of the joints with CFRP diminishes remarkably the fissures and the cracks of the structural elements.

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