Experimental Analysis of Reinforced Concrete Beams Strengthened with Innovative Techniques

Experimental Analysis of Reinforced Concrete Beams Strengthened with Innovative Techniques, Chastre, Carlos, Biscaia Hugo, Franco Noel, and Monteiro António , 41th IAHS Word Congress of Housing. Sustainability and Innovation for the Future, 13-16 September , Albufeira, Portugal, p.10, (2016) copy at https://docentes.fct.unl.pt/cmcr/publications/experimental-analysis-reinforced-concrete-beams-strengthened-innovative-techniques

Date Presented:

13-16 September


The strengthening of reinforced concrete structures with FRP materials has received a considerable increment in recent years due to their durability characteristics, high strength-weight and stiffness-weight ratios of FRP compared to other materials.An experimental program was conducted in order to analyse the behaviour of different structural solutions to strengthen reinforced concrete beams with carbon FRP composites: EBR (Externally-Bonded Reinforcement), NSM (Near Surface Mounted) reinforcement and an innovative technique externally-bonded using continuous reinforcement embedded at ends (CREatE). The RC beams had a 3m span by 0.3m height and were tested until rupture in a 4-point bending test system.The CREatE technique has proved to be the most effective of the three alternatives tested, with the full utilisation of the CFRP and the highest strength, combined with the highest ductility.


REFERENCES[1] Chastre, C., Materiais e tecnologias de reforço de estruturas de betão - potencialidade e limitações, in REHABEND 2014 - Congresso Latinoamericano "Patología de la construcción, Tecnología de la rehabilitacíon y gestión del patrimonio". 2014: Santander. 10p.[2] Faria, P. and C. Chastre, Visão Integrada da Reabilitação, in Paredes 2015. Reabilitação e Inovação., P.B. Lourenço, et al., Editors. 2015: Lisboa. p. 1-20.[3] Rodrigues, C.C., Comportamento às acções cíclicas de pilares de betão armado reforçados com materiais compósitos, in Dissertação para a obtenção do grau de Doutor em Engenharia Civil na Especialidade de Estruturas, Universidade Nova de Lisboa 2005, Universidade NOVA de Lisboa.[4] Rodrigues, C.C., Comportamento da Ligação Aço-Resina-Betão em Elementos Estruturais, in D. Eng. Civil, Instituto Superior Técnico. 1993, Universidade Técnica de Lisboa: Lisboa.[5] Alkhrdaji, T. - Design and Application Techniques Key to Successful Structural Strengthening Projects. [cited in16/05/2016]. Available in URL: http://www.pullman-services.com/[6] Neves, S. - Pré-esforço exterior no reforço de estruturas. 2012, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa.[7] De Lorenzis, L. and Teng, J.G. “Near-surface mounted FRP reinforcement: an emerging technique for structural strengthening”. Composites: Part B, V. 38, No 2, 2007, pp. 119–143.[8] Carvalho, T., Reforço à flexão de vigas de betão armado com compósitos de CFRP, in Departamento de Engenharia Civil 2011, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa. p. 151.[9] Monteiro, A., Reforço de vigas de betão armado com armaduras exteriores de FRP. 2014, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa.[10] Carvalho, T., et al., Flexural Behaviour of RC T-Beams Strengthened with Different FRP Materials, in The Third International fib Congress and Exhibition "Think Globally, Build Locally", 2010, fib: Washington DC. 12p.[11] Oehlers DJ. FRP plates adhesively bonded to reinforced concrete beams: generic debonding mechanisms. Adv Struct Eng 2006:737–50.[12] Biscaia, H., et al., Factors influencing the performance of externally bonded reinforcement systems of GFRP-to-concrete interfaces. Materials and Structures, 2015. 48(9): p. 2961-2981.[13] Biscaia, H,.et al., A smeared crack analysis of reinforced concrete T-beams strengthened with GFRP composites. Engineering Structures, 2013. 56(November): p. 1346-1361.[14] fib (Féderation Internationale du Béton). Externally bonded FRP reinforcement for RC structures. Technical report by TG 9.3 - FRP reinforcement for concrete structures, Bulletin 14, July 2001.[15] ACI (American Concrete Institute). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures”. Committee 440, 2002.[16] JSCE (Japanese Society of Civil Engineers). “Recommendations for Upgrading of Concrete Structures with Use of Continuous Fiber Sheets”. Concrete Engineering Series 41, March 2001.[17] Chastre Rodrigues, C. et al. “Structural strengthening system with internally anchored reinforcements by adherence - WO 2016/005941 A1”, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa. Portugal, 2015.[18] Rodrigues, C.C. and M.A.G. Silva, Cyclic compression behaviour of polymer concrete. Journal of Polymer Engineering, 2007. 27(6-7): p. 525-545.

41_iahs_2016_-_carlos_chastre-ext-abstract.pdf132.86 KB