Mathematical Solution for Carbon Fiber-Reinforced Polymer Prestressed Concrete Skew Bridges

10.14359/773 ◽  
1999 ◽  
Vol 96 (6) ◽  
Keyword(s):  
Carbon Fiber ◽  
Prestressed Concrete ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Mathematical Solution ◽  
Reinforced Polymer ◽  
Skew Bridges ◽  
Carbon Fiber Reinforced

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.

scholarly journals Strengthening Prestressed Concrete Bridge Girders and Building Beams with Carbon Fiber Reinforced Polymer Sheets

2021 ◽  
Vol 6 (1) ◽  
pp. 55-57
Author(s):  
Herish A. Hussein ◽  
Zia Razzaq
Keyword(s):  
Carbon Fiber ◽  
Flexural Strength ◽  
Cross Sections ◽  
Prestressed Concrete ◽  
Concrete Strength ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The effect of Carbon Fiber Reinforced Polymer (CFRP) retrofitting and concrete type on the flexural strength of prestressed concrete I-section girders used in bridges and beams in buildings is investigated. Non-linear moment-curvature relationships are predicted using an iterative algorithm for both non-retrofitted and CFRP-retrofitted prestressed concrete girder and beam cross-sections with various concrete types. Two different CFRP-retrofitting schemes are analyzed for comparing their effectiveness. It is found that although non-retrofitted beam section exhibits greater ductility, the use of CFRP retrofitting in both tension and compression regions simultaneously results in a significant increase in flexural strength. It is also found that the higher the ultimate concrete strength, the higher is the influence of CFRP-retrofitting on increasing flexural strength.

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