Crack Resistance RC Columns Strengthened by CFRP System

2021 ◽  
Vol 878 ◽  
pp. 127-133
Author(s):  
J. Selejdak ◽  
Y. Blikharskyy ◽  
R. Khmil ◽  
Z. Blikharskyy
Keyword(s):  
Crack Resistance ◽  
Experimental Testing ◽  
Experimental Studies ◽  
Concrete Columns ◽  
Fiber Reinforced Polymers ◽  
Tension Zone ◽  
Carbon Fiber Reinforced Polymers ◽  
Rc Columns ◽  
Reinforced Polymers ◽  
Compression Load

This paper presents the experimental testing of eccentrically compressed reinforced concrete columns. There are experimental results of crack resistance of non-strengthened (control) and strengthened RC columns in the tension zone. The columns were strengthened by carbon fiber reinforced polymers (CFRP). As a result of experimental studies with the columns strengthened by CFRP, we obtain that the width of their crack decreased by an average of 33%. The eccentric compression load of the crack’s appearance increased from 40 kN to 60 kN for strengthened columns.

scholarly journals Ductility of the Tensile Zone in Bent Wooden Beams Strengthened with CFRP Materials

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5451 ◽  
Author(s):  
Agnieszka Wdowiak-Postulak ◽  
Janusz Brol
Keyword(s):  
Cross Sections ◽  
Experimental Tests ◽  
Maximum Load ◽  
Fiber Reinforced Polymers ◽  
Tension Zone ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Reinforced Beams ◽  
Scale Models ◽  
Strength And Stiffness

This article presents experimental results from the bending of technical-scale models of beams reinforced in the tension zone with CFRP (Carbon Fiber Reinforced Polymers) materials, with a focus on the benefits resulting from the increased ductility in the tension zone of these beams. In experimental tests, the mechanical properties of reinforced beams were compared with unreinforced beams in terms of the maximum load, deflection, images of damage, stiffness, and distribution of deformation. The results showed that the proposed reinforcement solution was advantageous due to its strength and stiffness, and the safety of the structure. Based on this analysis, it was concluded that the reinforcement of wood with CFRP materials has a positive effect on the behavior and safety of structures. Also, a method of analytical checking of strengthened beams with small cross-sections was presented in the article.

scholarly journals Research of RC columns strengthened by carbon FRP under loading

2018 ◽  
Vol 174 ◽  
pp. 04017 ◽  
Author(s):  
Yaroslav Blikharskyy ◽  
Roman Khmil ◽  
Zinoviy Blikharskyy
Keyword(s):  
Cost Reduction ◽  
Concrete Columns ◽  
Reinforce Concrete ◽  
Fiber Reinforced Polymers ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Performance Time ◽  
Modern Methods ◽  
Initial Load ◽  
The Cost

The usage of carbon fiber-reinforced polymers (FRP) are described as modern methods of strengthening for reinforced concrete constructions. The advantage of these materials are the great corrosion resistance to environmental factors, high stiffness and strength and weight in comparison with other materials. The disadvantage of relatively high cost is offset by the cost reduction and labor when performing work on strengthening, by decreasing of performance time, by lack of needs to use the expensive equipment, installed and used without unloading the structures. This paper presents experimental results of 6 reinforce concrete columns strengthened by CFRP strips Sika Carbodur S512 with 50 mm width. The comparative analysis was carried out and strengthened effectiveness was determined for 2 unstrengthen control specimens, 2 specimens strengthened without initial load and 2 specimens strengthened at 1/2 of experimentally determined destructive efforts of the unstrengthen column.

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