Seismic strengthening of beam-column joints with multidirectional CFRP laminates

• Author(s): Coelho, Mário R. F. ; Fernandes, Pedro Miguel Gomes ; Melo, José ; Sena-Cruz, José ; Varum, Humberto ; Barros, Joaquim A. O. ; Costa, Aníbal
• Date: 2012
• Persistent ID: http://hdl.handle.net/1822/19725
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): MDL-CFRP; Seismic retrofitting; Multidirectional CFRP laminates; RC beam-column joint; Seismic strengthening; MF-EBR strengthening technique
• Document Type: Conference Object
• Language: English

Description

An experimental program was carried out to analyse the potentialities of a technique based on the use of multidirectional CFRP laminates (MDL-CFRP) for the seismic repair and strengthening of reinforced concrete (RC) beam-column joints. This experimental program comprises cyclic tests on three full-scale RC joints, representative of interior beam-column connections in buildings. The joints were initially submitted to a cyclic test inducing a damage pattern representative of a seismic event. Subsequently, they were repaired and strengthened with MDL-CFRP. The strengthened joints were then tested for the same loading history of the original ones up to their failure. The adopted strengthening technique uses the MDL-CFRP that are simultaneously glued and anchored to the concrete surfaces. This technique is called Mechanically Fastened and Externally Bonded Reinforcement (MF-EBR). In the present study, the effectiveness of two different strengthening configurations was investigated. The tests are described and the main results are presented and analyzed.