Encontrados 50 documentos, a visualizar página 1 de 5
Evaluation of code formulations for NSM CFRP bond strength of RC elements
Coelho, Mário R. F.; Sena-Cruz, José; Dias, Salvador J. E.; Miranda, Tiago F. S.This paper presents an analytical analysis which intends to verify the accuracy of existing code formulations for predicting the pullout strength of NSM CFRP systems applied to concrete. A database with a limited set of parameters was gathered and two code formulations were tested on it. Then, a new approach was tested. This uses Data Mining algorithms to develop models to predict the pullout strength based on ...
Reinforced concrete beams strengthened in shear with NSM CFRP laminates : asses...
Dias, Salvador J. E.; Barros, Joaquim A. O.To appraise the performance of the Near surface mounted (NSM) technique with carbon fiber reinforced polymer (CFRP) laminates for the shear strengthening of reinforced concrete (RC) beams having a certain percentage of existing steel stirrups, an extensive experimental research was carried out. The influence on the effectiveness of the NSM shear strengthening technique of the following parameters was investigat...
Behaviour of RC slabs flexurally strengthened with prestressed NSM CFRP laminates
Hosseini, M.; Dias, Salvador J. E.; Barros, Joaquim A. O.To investigate the effect of the prestressed NSM CFRP laminates on the behaviour of RC slabs, an experimental program was carried out. A total of four RC slabs were tested, a reference slab (without CFRP), and three slabs flexurally strengthened using NSM CFRP laminates with different prestress level: 0%, 20% and 40% of the ultimate tensile strength of the CFRP material. The experimental program is described an...
Shear strengthening of RC beams with NSM CFRP laminates : experimental research...
Dias, Salvador J. E.; Barros, Joaquim A. O.The effectiveness of the NSM technique with CFRP laminates for the shear strengthening of RC beams with a certain percentage of steel stirrups was assessed by an extensive experimental research. In this context, the influence of the following parameters was investigated: concrete strength; percentage of existing steel stirrups; percentage and inclination of the CFRP laminates; existence of cracks when the RC be...
Assessment of the effectiveness of the NSM shear strengthening technique for de...
Barros, Joaquim A. O.; Dias, Salvador J. E.The effectiveness of the near surface mounted (NSM) technique with carbon fibre reinforced polymer (CFRP) laminates for the shear strengthening of reinforced concrete (RC) beams has been demonstrated during the last decade. Analytical and numerical research indicate that the NSM technique for the shear strengthening of RC beams can be more effective if the CFRP laminates are deeper installed into the slits. How...
A FEM-based model to predict the behaviour of RC beams shear strengthened accor...
Barros, Joaquim A. O.; Baghi, Hadi; Dias, Salvador J. E.; Gouveia, A. VenturaExperimental research has demonstrated the excellent performance of the near surface mounted (NSM) technique with carbon fibre reinforced polymer (CFRP) laminates for the shear strengthening of reinforced concrete (RC) beams. This paper presents a finite element analysis to evaluate the behaviour of RC beams shear strengthened with NSM CFRP laminates. To predict correctly the deformational and the cracking beha...
NSM shear strengthening technique with CFRP laminates applied in high-strength ...
Barros, Joaquim A. O.; Dias, Salvador J. E.Documento submetido para revisão pelos pares. A publicar em Composites : part B: Engineering. ISSN 1359-8368 ; The effectiveness of the near surface mounted (NSM) shear strengthening technique with carbon fiber reinforced polymer (CFRP) laminates applied in high-strength concrete beams with a certain percentage of existing steel stirrups is assessed by experimental research. In this context, the influence of t...
Performance of pre-cracked RC beams shear strengthened with NSM CFRP laminates
Dias, Salvador J. E.; Barros, Joaquim A. O.The strengthening of an existing Reinforced Concrete (RC) structure often involves concrete in a cracked state. To evaluate the effect of existing cracks on the behavior of RC beams shear strengthened according to the Near Surface Mounted (NSM) technique with Carbon Fiber Reinforced Polymer (CFRP) laminates, an experimental program was carried. NSM CFRP laminates were applied in RC beams with or without cracks ...
Comportamento de vigas de betão armado reforçadas à flexão com laminados de CFR...
Dias, Salvador J. E.; Barros, Joaquim A. O.; Azevedo, CristianaNeste trabalho apresenta-se um programa experimental que foi realizado para avaliar o comportamento de vigas de betão armado reforçadas à flexão usando a técnica da inserção de laminados de CFRP em entalhes efetuados no betão de recobrimento. Foram testadas três percentagens de reforço de CFRP (reforço com um laminado, com dois laminados e com três laminados) em vigas de betão armado com 2600 mm de comprime...
Aplicação da técnica da inserção de laminados de CFRP no reforço ao corte de vi...
Dias, Salvador J. E.; Barros, Joaquim A. O.Neste trabalho apresenta-se um programa experimental que foi realizado para avaliar a viabilidade da aplicação da técnica da inserção de laminados de CFRP no reforço ao corte de vigas de betão de elevada resistência (59.4 MPa). Seis soluções de reforço de CFRP, referentes a três tipos de orientação dos laminados (45º, 60º e 90º) e a duas percentagens de CFRP, foram aplicadas a vigas com uma percentagem de a...
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