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Model to simulate the behaviour of RC beams shear strengthened with ETS bars

Barros, Joaquim A. O.; Breveglieri, Matteo; Gouveia, A. Ventura; Dalfré, Gláucia; Aprile, Alessandra

To predict correctly the deformational and the cracking behavior of reinforced concrete elements failing in shear using a smeared crack approach, the strategy adopted to simulate the crack shear stress transfer is crucial. For this purpose, several strategies for modeling the fracture mode II were implemented in a smeared crack model already existing in the FEM-based computer program, FEMIX. Special development...


The contribution of embedded through-section bars for the shear resistance of RC

Dalfré, Gláucia; Barros, Joaquim A. O.; Breveglieri, Matteo; Aprile, Alessandra

In a recent experimental program, the performance of a novel shear strengthening technique, designated by Embedded Through-Section (ETS), was appraised by performing a series of beam bending tests composed of eight reinforced concrete (RC) beams. According to this strengthening technique, holes are opened through the beam’s section, with the desired inclinations, and bars are introduced into these holes an...


Estudo paramétrico do comportamento de faixas de laje contínuas de BA reforçada...

Dalfré, Gláucia; Barros, Joaquim A. O.; Breveglieri, Matteo; Aprile, Alessandra

Os programas experimentais para o reforço à flexão de estruturas de betão armado (BA) segundo a técnica NSM (Near Surface Mounted, em língua inglesa) com laminados de CFRP (Carbon Fiber Reinforced Polymer, em língua inglesa) são, em geral, realizados com vigas simplesmente apoiadas. Deste modo, há uma carência de estudos experimentais e teóricos sobre a capacidade de redistribuição de momentos em elementos ...


Assessment of the effectiveness of NSM-CFRP flexural strengthening configuratio...

Breveglieri, Matteo; Barros, Joaquim A. O.; Dalfré, Gláucia; Aprile, Alessandra

The experimental programs for the flexural strengthening of reinforced concrete (RC) structures using the Near Surface Mounted (NSM) technique with Fiber Reinforced Polymer (FRP) laminates were, in general, conducted with simply supported beams. Therefore, there is a lack of experimental and theoretical studies on the moment redistribution of statically indeterminate RC elements strengthened with NSM technique....


Hybrid CFRP-based strengthening technique to increase the flexural resistance a...

Barros, Joaquim A. O.; Perrone, Monia; Aprile, Alessandra

A strengthening technique that combines carbon fibre reinforced polymer (CFRP) laminates and strips of wet lay-up CFRP sheet was used to increase the flexural resistance and the energy dissipation capacity of square cross-section columns of very low concrete strength submitted to constant axial compressive force and cyclic lateral loading. The laminates, applied according to the Near Surface Mounted (NSM) techn...


Exploring the possibilities of a new technique for the shear strengthening of R...

Barros, Joaquim A. O.; Dalfré, Gláucia; Trombini, Elisa; Aprile, Alessandra

In the present work, the possibilities of a CFRP-based strengthening technique, herein designated Core Drilled Mounted (CDM) technique, to increase the shear resistance of reinforced concrete (RC) elements were explored. For this purpose, an exploratory experimental program of short beam shear specimens was carefully carried out with the purpose of capturing the main features of the CFRP bar contribution for th...


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Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia