Study on Compressive Strength of Fiber Reinforced Polymer Confined Concrete

2011 ◽  
Vol 477 ◽  
pp. 443-452
Author(s):  
Li Wen Zhang ◽  
Jun Ping Zhang ◽  
Zuo Sun
Keyword(s):  
Numerical Simulation ◽  
Compressive Strength ◽  
Compressive Load ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Dimension Analysis ◽  
Confinement Stress ◽  
Set Up

The study on compressive strength of fiber reinforced polymer confined concrete was conducted in this paper. Firstly, the general confinement mechanics was revealed, in which the confinement stress-σl, the restraint stiffness-El and the ultimate confinement stress-fl were proposed. Secondly, the influences of various parameters on compressive strength were analyzed by recent related studies and numerical simulation. The numerical simulation was carried out through the total of 27 finite element models under axial compressive load which were constructed by using software-ANSYS. Finally, the compressive strength model was set up by the dimension analysis and numerical regression.

scholarly journals Compressive Strength of Modified FRP Hybrid Bars

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1898
Author(s):  
Marek Urbański
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Basalt Fiber ◽  
Test Method ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Free Length ◽  
Compression Properties ◽  
Reinforced Polymer ◽  
Frp Bars

A new type of HFRP hybrid bars (hybrid fiber reinforced polymer) was introduced to increase the rigidity of FRP reinforcement, which was a basic drawback of the FRP bars used so far. Compared to the BFRP (basalt fiber reinforced polymer) bars, modification has been introduced in HFRP bars consisting of swapping basalt fibers with carbon fibers. One of the most important mechanical properties of FRP bars is compressive strength, which determines the scope of reinforcement in compressed reinforced concrete elements (e.g., column). The compression properties of FRP bars are currently ignored in the standards (ACI, CSA). The article presents compression properties for HFRP bars based on the developed compression test method. Thirty HFRP bars were tested for comparison with previously tested BFRP bars. All bars had a nominal diameter of 8 mm and their nonanchored (free) length varied from 50 to 220 mm. Test results showed that the ultimate compressive strength of nonbuckled HFRP bars as a result of axial compression is about 46% of the ultimate strength. In addition, the modulus of elasticity under compression does not change significantly compared to the modulus of elasticity under tension. A linear correlation of buckling load strength was proposed depending on the free length of HFRP bars.

scholarly journals Parametric Study on the Effect of Steel Confinement in Short Bridge Piers Retrofitted with Externally-Wrapped FRP

2019 ◽  
Vol 271 ◽  
pp. 01012
Author(s):  
Diogo Zignago ◽  
Michele Barbato
Keyword(s):  
Compressive Strength ◽  
Parametric Study ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Bridge Piers ◽  
Element Analysis ◽  
Reinforced Polymer ◽  
Externally Bonded ◽  
Frp Wrapping ◽  
Concrete Model

Confinement of reinforced concrete (RC) piers generally has a beneficial effect on both the compressive strength and the ductility of the confined member. Thus, externally-bonded fiber-reinforced polymer (FRP) wrapping is often used as a retrofit technique for bridge piers when additional compressive strength is needed. This study employs finite element analysis and a recently developed FRP-and-steel confined concrete model to investigate the influence of internal steel confinement on the response of circular RC columns confined with FRP and subject to concentric axial load. This new model leads to more accurate estimates of the response of these columns, what is particularly relevant for piers in short span bridges that are subjected mainly to vertical loads, for which it could lead to a more efficient and economical piers’ retrofit, as well as a more accurate and less conservative bridge rating. A parametric study is conducted to examine the importance of some key parameters in the design of such columns.

Prior and post peaks compressive behavior of concrete-filled double-skin tubular columns with BFRP-punched-in outer steel and BFRP-circular inner steel

2020 ◽  
Vol 23 (13) ◽  
pp. 2911-2927
Author(s):  
Yung William Sasy Chan ◽  
Zhi Zhou ◽  
Zhenzhen Wang ◽  
Jinping Ou
Keyword(s):  
Load Capacity ◽  
High Energy ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Peak Performance ◽  
Design Parameters ◽  
Fiber Reinforced ◽  
Tubular Columns ◽  
Reinforced Polymer ◽  
Double Skin

Fiber-reinforced polymer composites have been widely used to design fiber-reinforced polymer–based confined concrete columns with potential benefits. However, it is critical to design a column with sufficient post-peak performance that can prevent its collapse at the rupture of the fiber-reinforced polymer tube. This article presents the experimental results on the prior and post peaks behavior of concrete-filled double-skin tubular columns with basalt fiber-reinforced polymer (BFRP)–punched-in outer steel and BFRP-circular inner steel (BFST-DSTCs). Twenty-two specimens were tested under axial compression to investigate the effects of design parameters on the behavior of the BFST-DSTC. The outcomes reveal that the BFST-DSTC exhibits the best performance in terms of load capacity, confinement ratio, failure and damage mechanisms, and ductility in prior and post peaks. The inner fiber-reinforced polymer jacket delays the buckling of the inner tube. The punched-in patterns of the outer steel improve the confinement effectiveness of the fiber-reinforced polymer jacket. The BFST-DSTC displays a good post-peak performance with high-energy dissipation capacity that prevents the concerned structure from collapse after the fiber-reinforced polymer jacket rupture. Finally, a new confinement model is proposed to predict the ultimate point of the confined concrete.

Experimental study of polyester fiber-reinforced polymer confined concrete cylinders

2016 ◽  
Vol 86 (15) ◽  
pp. 1606-1615 ◽  
Author(s):  
Liang Huang ◽  
Xinrui Yang ◽  
Libo Yan ◽  
Kai He ◽  
Hang Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Polyester Fiber ◽  
Fiber Reinforced Polymer ◽  
Confined Concrete ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Concrete Cylinders
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