Flexural Behavior and Deformability of Fiber Reinforced Polymer Prestressed Concrete Beams

2003 ◽  
Vol 7 (4) ◽  
pp. 275-284 ◽  
Author(s):  
Patrick X. W. Zou
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Reinforced Polymer

scholarly journals Experimental investigation on the seismic behavior of concrete beams with prestressing carbon fiber reinforced polymer tendons

2019 ◽  
Vol 103 (1) ◽  
pp. 003685041988523
Author(s):  
Zuohu Wang ◽  
Zhanguang Gao ◽  
Yuan Yao ◽  
Weizhang Liao
Keyword(s):  
Carbon Fiber ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Ductility Index ◽  
Reinforced Polymer ◽  
Energy Dissipation Capacity ◽  
Carbon Fiber Reinforced

Seven prestressed concrete beams and one normal concrete beam were tested to study the seismic performance of concrete beams with prestressing carbon fiber reinforced polymer tendons. The failure modes, hysteretic curves, ductility, stiffness degeneration, and energy dissipation capacity were studied systematically. This study shows that the partial prestressing ratio is the main factor that affects the seismic performance of carbon fiber reinforced polymer prestressed concrete beams. The beam is more resilient to seismic loads as the partial prestressing ratio decreases. Under the same partial prestressing ratio value, the energy dissipation capacity of prestressed concrete beams with unbonded carbon fiber reinforced polymer tendons was better than that of prestressed beams with bonded carbon fiber reinforced polymer tendons. When combining both bonded and unbonded prestressing carbon fiber reinforced polymer tendons, the ductility index of concrete beams was improved. Compared with that of fully unbonded and fully bonded carbon fiber reinforced polymer prestressed concrete beams, the ductility index of concrete beams with combined bonded and unbonded prestressing tendons increased by 26% and 12%, respectively.

Exploratory experimental study on flexural behavior of CFRP-reinforced concrete beams subjected to acidic loading effect

2018 ◽  
Vol 21 (14) ◽  
pp. 2184-2197 ◽  
Author(s):  
Hai-Yang Luan ◽  
Ying-Fang Fan ◽  
An Chen ◽  
Shi-Yi Zhang
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Flexural Behavior ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

This article presents an exploratory study on the flexural behavior of carbon fiber–reinforced polymer–reinforced concrete beams subjected to acidic loading effect. To this end, an artificial acid rain with a pH level of 1.5 was prepared by mixing sulfate and nitric acid solutions. Eight reinforced concrete beams with/without carbon fiber–reinforced polymer applications were constructed and conditioned using the artificial acid rain. During conditioning, bending loads were applied to the top surfaces of the beams to simulate the acidic loading action. Three carbon fiber–reinforced polymer reinforcement schemes (corrosion reinforcement, reinforcement corrosion, and cracking reinforcement) were considered. After conditioning, the length and quantity of initial cracks in the beams were recorded. A combined ultrasonic–rebound method was then adopted to measure the strength and corrosion depth of the concrete and evaluate the beams’ integrity. Next, four-point bending tests were conducted to study the beams’ flexural behavior. It can be concluded that all beams deteriorated with the increase of the corrosion time. Carbon fiber–reinforced polymer–reinforced concrete beams performed better than normal reinforced concrete beams under the acidic loading effect. The initial cracks can influence the flexural behavior of carbon fiber–reinforced polymer–reinforced concrete beams.

Flexural behavior of concrete beams reinforced with aramid fiber reinforced polymer (AFRP) bars

2011 ◽  
Vol 38 (4) ◽  
pp. 459-477 ◽  
Author(s):  
Min Sook Kim ◽  
Young Hak Lee ◽  
Heecheul Kim ◽  
Andrew Scanlon ◽  
Junbok Lee
Keyword(s):  
Concrete Beams ◽  
Aramid Fiber ◽  
Fiber Reinforced Polymer ◽  
Flexural Behavior ◽  
Fiber Reinforced ◽  
Reinforced Polymer

Flexural Capacity of Concrete Beams Prestressed with Carbon Fiber Reinforced Polymer (CFRP) Tendons

2010 ◽  
Vol 168-170 ◽  
pp. 1353-1362 ◽  
Author(s):  
Xiu Li Du ◽  
Zuo Hu Wang ◽  
Jing Bo Liu
Keyword(s):  
Carbon Fiber ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Weight Ratio ◽  
Analytical Investigation ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Flexural Capacity ◽  
Reinforced Polymer ◽  
Prestressed Beam

Fiber reinforced polymer (FRP), particularly those incorporating carbon fiber (CFRP), has high strength, high stiffness-to-weight ratio and high resistance to corrosion, which shows potential for use as prestressing tendons in corrosive environment. However, concrete beams prestressed with FRP tendons have showed brittle flexural failure due to the elastic rupture of FRP tendons. In order to improve the ductility, a combination of bonded and/or unbonded prestressing tendons was used. Nine prestressed concrete beams were tested up to failure to study the effect of bonded and unbonded FRP tendons on their flexural capacity. Three factors were taken into consideration; the bonding condition of CFRP tendons, the location of CFRP tendons and the prestressing ratio. Also an analytical investigation was carried out to extend some flexural capacity calculation equations to this beam type. The results of the experimental showed that under the same condition, the carrying capacity of concrete beam prestressed with bonded FRP tendons was 20% higher than that of internal unbonded prestressed beam, and was 40% higher than that of external unbonded prestressed beam without deviators. By combination of bonded and unbonded FRP tendons, the ductility of prestressed concrete beams can be improved.

Sign in / Sign up

Export Citation Format

Share Document