Project/scholarship details
- Project/scholarship ID
114945
- Reference
PTDC/ECM/114945/2009
- FundRef URI
- Funder
FCT - Fundação para a Ciência e a Tecnologia, I.P.
- Funder's country
Portugal
- Funding program
5876-PPCDTI
- Funding amount
178,674.00 €
- Start date
2011-04-01
- End date
2014-09-30
Documents
Creep of structural adhesives: an overview
Costa, Inês; Barros, Joaquim A. O.This study is part of a research project that aims to develop a new strategy to apply prestressed Carbon Fibre Reinforced Polymer (CFRP) laminates according to the Near Surface Mounted (NSM) technique for the flexural strengthening of Reinforced Concrete elements. CFRP elements exhibit lower relaxation than common steel strands and the creep of the bonding agents is, therefore, the most relevant effect to be ta...
Behaviour of RC slabs flexurally strengthened with prestressed NSM CFRP laminates
Hosseini, Mhoammadreza Mostakhdemin; 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...
A model for the prediction of the behaviour of continuous RC slabs flexurally s...
Barros, Joaquim A. O.; Dalfré, GláuciaTo predict the load-deflection response up to the collapse of statically indeterminate reinforced concrete (RC) structures, an analytical model was developed and its predictive performance was appraised by using the data obtained in experimental programs. The proposed approach is based on the force method by establishing a number of displacement compatibility equations that can provide the unknown variables. To...
Assessment of the effectiveness of prestressed NSM CFRP laminates for the flexu...
Rezazadeh, M.; Costa, Inês; Barros, Joaquim A. O.The flexural behavior of RC beams strengthened with prestressed near-surface-mounted (NSM) carbon-fiber-reinforced-polymer (CFRP) laminate was investigated in this paper. For this purpose, four RC beams were tested under monotonic four-point loading. One beam was kept un-strengthened, as a control beam, and another one was strengthened with a non-prestressed NSM CFRP laminate. The remaining beams were strengthe...
Assessment of the long term behaviour of structural adhesives in the context of...
Costa, Inês; Barros, Joaquim A. O.This study is part of a research project that aims to develop a new strategy to apply prestressed Carbon Fibre Reinforced Polymer (CFRP) laminates according to the Near Surface Mounted (NSM) technique for the flexural strengthening of Reinforced Concrete (RC) elements. This paper includes a state-of-the-art covering the following main aspects: (1) theoretical models used to predict creep behaviour; (2) standard...
NSM technique to increase the load carrying capacity of continuous RC slabs
Dalfré, Gláucia; Barros, Joaquim A. O.This work presents and analysis the results of an ongoing research project on the use of the near surface mounted (NSM) carbon fiber-reinforced polymer (CFRP) laminates for the increase of the load carrying capacity of statically indeterminate (two spans) reinforced concrete (RC) slabs. The test program consisted of seventeen slab strips, grouped in two series that are different on the adopted strengthening sch...
Transfer zone of prestressed CFRP reinforcement applied according to NSM techni...
Rezazadeh, Mohammadali; Barros, Joaquim A. O.This study presents an experimental program to assess the tensile strain distribution along prestressed carbon fiber reinforced polymer (CFRP) reinforcement flexurally applied on the tensile surface of RC beams according to near surface mounted (NSM) technique. Moreover, the current study aims to propose an analytical formulation, with a design framework, for the prediction of distribution of CFRP tensile strai...
Innovative methodologies for the enhancement of the flexural strengthening perf...
Rezazadeh, MohammadaliTese de Doutoramento em Engenharia Civil; Carbon fiber reinforced polymer (CFRP) materials have been extensively adopted for the flexural and shear strengthening of RC structures due to their several advantages, like a low mass density, a high strength and stiffness to weight ratios, excellent fatigue behavior, non-susceptible to corrosion, and high durability in typical environment conditions of civil engineer...
Analytical approach for the flexural analysis of RC beams strengthened with pre...
Rezazadeh, Mohammadali; Barros, Joaquim A. O.; Costa, I. G.The objective of this paper is to propose a simplified analytical approach to predict the flexural behavior of simply supported reinforced-concrete (RC) beams flexurally strengthened with prestressed carbon fiber reinforced polymer (CFRP) reinforcements using either externally bonded reinforcing (EBR) or near surface mounted (NSM) techniques. This design methodology also considers the ultimate flexural capacity...
Flexural strengthening of reinforced low strength concrete slabs using prestres...
Hosseini, Mhoammadreza Mostakhdemin; Dias, Salvador J. E.; Barros, Joaquim A. O.The effectiveness of the Near Surface Mounted (NSM) technique with prestressed CFRP (carbon fiber reinforced polymer) laminates for the flexural strengthening of reinforced concrete (RC) slabs of low strength concrete was assessed. Four RC slabs were tested, a reference slab (without CFRP), and three slabs flexurally strengthened using NSM CFRP laminates with different prestress level of the ultimate tensile st...
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