Evaluating the ductility and shear behaviour of carbon fibre reinforced polymer and glass fibre reinforced polymer reinforced concrete columns

2010 ◽  
Vol 21 (4) ◽  
pp. 249-264 ◽  
Author(s):  
Mostafa Barghi ◽  
Mohsen Azadbakht ◽  
Meysam Hadad
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Glass Fibre ◽  
Concrete Columns ◽  
Shear Behaviour ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

Fibre-reinforced polymer strengthening and fibre Bragg grating–based monitoring of reinforced concrete cantilever slabs with insufficient anchorage length of steel bars

2017 ◽  
Vol 20 (11) ◽  
pp. 1684-1698 ◽  
Author(s):  
Shishun Zhang ◽  
Tao Yu
Keyword(s):  
Reinforced Concrete ◽  
Glass Fibre ◽  
Bragg Grating ◽  
Fibre Bragg Grating ◽  
Strain Monitoring ◽  
Reinforced Polymer ◽  
Glass Fibre Reinforced Polymer ◽  
Polymer Sheets ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

Reinforced concrete cantilever slabs are among structures that are most likely to develop structural integrity problems, as they are statically determinate and often exposed to the outdoor environment. This article presents an experimental study on the strengthening of reinforced concrete cantilever slabs where the anchorage of the top steel reinforcing bars into the adjacent wall was insufficient. The experimental study involved the use of a fibre-reinforced polymer strengthening system and fibre Bragg grating sensors for strain monitoring. The fibre-reinforced polymer strengthening system consisted of glass fibre–reinforced polymer sheets and glass fibre–reinforced polymer spike anchors which connected the glass fibre–reinforced polymer sheets to the adjacent concrete wall. The test results showed that the fibre-reinforced polymer strengthening system was effective in improving the load-carrying capacity of reinforced concrete cantilever slabs and the fibre Bragg grating sensors worked efficiently and reliably for strain monitoring. The debonding in glass fibre–reinforced polymer sheet/glass fibre–reinforced polymer anchor-to-concrete bonded joints was found to be a progressive process associated with an increasing load. The fibre-reinforced polymer strengthening system examined in this study is thus a potential ductile solution for deficient cantilever slabs.

Accelerated corrosion and repair of reinforced concrete columns using carbon fibre reinforced polymer sheets

2000 ◽  
Vol 27 (5) ◽  
pp. 941-948 ◽  
Author(s):  
C Lee ◽  
J F Bonacci ◽  
M DA Thomas ◽  
M Maalej ◽  
S Khajehpour ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Concrete Columns ◽  
Corrosion Monitoring ◽  
Reinforced Concrete Columns ◽  
Accelerated Corrosion ◽  
Cfrp Sheets ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

An experimental study on the simulation of corrosion in large-scale reinforced concrete columns and their repair using carbon fibre reinforced polymer (CFRP) sheets is presented. Seven columns were subjected to an accelerated corrosion regime, wrapped using CFRP sheets, then tested to structural failure and (or) subjected to further post-repair accelerated corrosion, monitoring, and testing. Accelerated corrosion was achieved by adding sodium chloride to the mixing water, applying a current to the reinforcement cage, and subjecting the specimens to cyclic wetting and drying. Results showed that the CFRP repair greatly improved the strength of the repaired member and retarded the rate of post-repair corrosion. Moreover, subjecting the repaired column to extensive, post-repair corrosion resulted in no loss of strength or stiffness and only a slight reduction in the ductility of the repaired member.Key words: accelerated corrosion, carbon fibre reinforced polymer, composites, corrosion damage, corrosion rate, external confinement, reinforced concrete columns.

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