Constitutive modeling of reinforced concrete and prestressed concrete structures strengthened by fiber-reinforced plastics

2010 ◽  
Vol 92 (7) ◽  
pp. 1640-1650 ◽  
Author(s):  
H.-T. Hu ◽  
F.-M. Lin ◽  
H.-T. Liu ◽  
Y.-F. Huang ◽  
T.-C. Pan
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Constitutive Modeling ◽  
Concrete Structures ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

scholarly journals Experimental Evaluation of PSC Structures from FRP with a Prestressing Strengthening Method

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1265
Author(s):  
Tae-Kyun Kim ◽  
Sang-Hyun Kim ◽  
Jong-Sup Park ◽  
Hee-Beom Park
Keyword(s):  
Prestressed Concrete ◽  
Strengthening Effect ◽  
Fiber Reinforced ◽  
Prestress Loss ◽  
Near Surface ◽  
Reinforced Plastics ◽  
Near Surface Mounted ◽  
Fiber Reinforced Plastics ◽  
Flexural Tests ◽  
Strengthening Method

A prestressed concrete (PSC) structure is subject to prestress losses in the long and short terms, and the structure ages over time. The structure is susceptible to corrosion from exposure to environmental factors such as moisture, chloride, and carbonation, thus causing prestress loss. Therefore, strengthening the structure is needed to address this problem. Here, the near surface mounted (NSM) method and the external prestressing (EP) method were selected because they are capable of applying additional prestressing. Further, we used fiber-reinforced plastics or polymers, or carbon fiber-reinforced plastics or polymers because of their high tensile strength and noncorrosive properties. For EP tests, prestressed strands were used. Accordingly, this study performs four-point flexural tests and evaluations for 12 types of specimens fabricated with different PSC methods. All specimens fabricated with the NSM (prestressing, no prestressing) and EP methods achieved stiffness that was 50–60% higher than that of the control PSC specimen. It was observed that the EP method in conjunction with prestressing yielded the best strengthening effect. It is expected that the results of this study will be applied to real structures for strengthening them and improving their performances.

Comprehensive Sewage-Treating Technology Using Bio-Tank of Glass Fiber Reinforced Plastics on Intensive Scaled Swine Farm

2011 ◽  
Vol 130-134 ◽  
pp. 1075-1079
Author(s):  
Qing Xian Xu ◽  
Xue Fang Guan ◽  
Bin Lin
Keyword(s):  
Reinforced Concrete ◽  
Glass Fiber ◽  
Fiber Reinforced ◽  
Swine Farm ◽  
Reinforced Plastics ◽  
Swine Farms ◽  
Glass Fiber Reinforced ◽  
Pollution Problem ◽  
Fiber Reinforced Plastics ◽  
Technological Route

The scaled swine farms have been developed rapidly in China since 21stcentury, which bring serious problem in environmental pollution, especially in winter. In order to s reduce the pollution from intensive scaled swine farms, as well as produce biogas in winter, a technological route was put forward to control the sewage pollution in swine farm by using bio-tank of glass fiber reinforced plastics (GFRP). The experiments in swine farm of FuJian Hua Feng Co. Ltd in Nanping city showed that the developed technology had achieved zero-draining, which was able to solve the pollution problem and produce biogas in winter. The sewage temperature of bio-tank of GFRP increased average 1.18°C more than that of bio-tank of reinforced concrete. And the average biogas-generating rate of bio-tank of GFRP of year 2009 was 0.45 m3·m-3·d-1, which increased 28% more than that of reinforced concrete. The indexes of COD, BOD, SS, NH3-N, and TP for the out-let wastewater of the treatment were 579.1 mg·L-1, 237.7 mg·L-1, 289.8 mg·L-1, 319.4 mg·L-1and 31.7 mg·L-1, respectively.

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