scholarly journals Compression Behaviour of Concrete Cylinder with Carbon Fibre Reinforced Polymer (CFRP) Confinement

2021 ◽  
Vol 18 (1) ◽  
pp. 27
Author(s):  
Norsalwa Aisyah Senu ◽  
Ruqayyah Ismail ◽  
Norlizan Wahid ◽  
Hazrina Ahmad ◽  
Fariz Aswan Ahmad Zakwan
Keyword(s):  
Carbon Fibre ◽  
Load Capacity ◽  
Concrete Column ◽  
Compression Load ◽  
Concrete Cylinder ◽  
Reinforced Polymer ◽  
Concrete Cylinders ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Cfrp Confinement

Carbon fibre reinforced polymer (CFRP) confinement has always been one of the strengthening methods available for a vulnerable concrete column. This paper presents the compressive behaviour of nine circular concrete cylinders with CFRP confinement. Three different specimen conditions considered; full CFRP confinement, partial CFRP confinement and unconfined (control specimen). Nine concrete cylinders with 100 mm x 200 mm were tested under compression load.  It is discovered that full and partial CFRP confinement had improved concrete cylinder ultimate load capacity by 300% and 150% respectively when compared to the unconfined concrete cylinder. With 150% strength enhancement achieved by partial CFRP confined specimen, it is proven that partial CFRP confinement does provide sufficient confinement in enhancing concrete column strength as full CFRP confinement. This finding has led to remarkable discoveries which with lesser CFRP used the functionality of CFRP as strengthening material can still be utilized. Therefore, could contribute significant input to the construction industry in using lesser CFRP for more sustainable material approach.

scholarly journals Effect of Carbon Fibre Reinforced Polymer Strengthening on Axial Capacity and Ductility of Non-slender Square Concrete Columns

2020 ◽  
Author(s):  
Muthomi Munyua ◽  
Siphila Mumenya ◽  
John Mwero
Keyword(s):  
Carbon Fibre ◽  
Research Programme ◽  
Concrete Columns ◽  
Steel Reinforcement ◽  
Axial Capacity ◽  
Reinforced Polymer ◽  
Number Of Layers ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Cfrp Confinement

This research investigated the effect of Carbon Fibre Reinforced Polymer (CFRP) strengthening on the axial capacity and ductility of non-slender square concrete columns. There was a problem of buildings collapsing in Kenya. Retrofitting of the buildings vulnerable to collapse was of great importance to ensure the safety of the occupants and to address the housing deficit in the country. An experimental research programme was conducted on 90 non-slender square concrete columns to find out the gain in axial capacity and ductility of the columns strengthened by CFRP. The specimens (150mm x 150mm x 350mm) were made of plain and reinforced concrete. Three different concrete grades: C8/10, C12/15 and C16/20 were used. The specimen had varying configurations of CFRP wrap: partial and full confinement in one and two layers. Four parameters were investigated in this study: concrete grade, steel reinforcement, degree of confinement and the number of layers of CFRP wrap. The specimens were subjected to uniaxial compression up to failure, and the stress-strain curves were plotted. This study found that weaker concrete grades experienced the highest effect due to CFRP strengthening. Presence of reinforcement had a significant effect on the axial capacity and ductility of columns without CFRP strengthening. On the contrary, the presence of steel reinforcement reduced the effectiveness of CFRP strengthening. Partial CFRP confinement offered better material efficiency as compared to full CFRP confinement, and the number of layers had a direct relationship with the increase in strength and ductility.

Effect of Post-Heated Concrete Cylinders Repaired with CFRP Reinforcement

2012 ◽  
Vol 626 ◽  
pp. 620-624
Author(s):  
Sharifah Salwa Mohd Zuki ◽  
J. Jayaprakash ◽  
Lee Kit Hock ◽  
Ong Chong Yong
Keyword(s):  
Carbon Fibre ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Axial Loading ◽  
Reinforced Polymer ◽  
Concrete Cylinders ◽  
Carbon Fibre Reinforced Polymer ◽  
Different Temperatures ◽  
Fibre Reinforced Polymer ◽  
Heated Concrete

This paper presents the experimental results of post-heated concrete cylinders repaired externally using Carbon Fibre Reinforced Polymer (CFRP) fabrics. Eighteen concrete cylinders of size 155mm x 300mm were exposed to different temperatures of 100, 200, and 300°C for 3 hours. Subsequently, the exposed concrete cylinders were naturally cooled down to room temperature and repaired externally using CFRP reinforcement. All these cylinders were tested to failure under axial loading. Results show that the residual strength of post-heated CFRP repaired concrete cylinders was significantly increased between 47 to 51% over the control cylinders. However, the ductility of CFRP repaired concrete cylinders was increased at the elevated temperatures.

Influence of Ply Stacking Sequences on the Impact Response of Carbon Fibre Reinforced Polymer Composite Laminates

2019 ◽  
Author(s):  
Kristian Gjerrestad Andersen ◽  
Gbanaibolou Jombo ◽  
Sikiru Oluwarotimi Ismail ◽  
Segun Adeyemi ◽  
Rajini N ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Polymer Composite ◽  
Composite Laminates ◽  
Impact Response ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
The Impact
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