There is a growing need for the rehabilitation, repair, and upgrading of concrete structures such as bridges and buildings. The repair or rehabilitation of reinforced concrete structures often offers a lower cost alternative to rebuilding, and it is traditionally achieved by bonding steel plates to the tensile face of a reinforced concrete member. The shear strength can be enhanced with plates ...

This paper presents a method of analysis for the response of concrete beams reinforced with fibrereinforced-plastic (FRP) tension rods and aramid spirals. Three different kinds of longitudinal reinforcement are adopted; CFRP, AFRP and GFRP. Both under-reinforced and over-reinforced sections are described. It is found that the ratio of neutral axis depth and effective depth can be used as an ind...

externally bonded reinforcement on grooves (ebrog) is a new method that has been introduced to postpone or eliminate debonding of frp sheets from concrete surface in concrete beams strengthened for flexure and increase loading capacity. for strengthening reinforced conceret beams in strructure, use of different types of frp like: laminate, afrp, cfrp, and gfrp. by there is some differences betw...

This paper presents test results obtained from an experimental investigation to check the feasibility of reinforcing laminated bamboo columns by using aramid fiber reinforced polymer (AFRP) composites and examine effect slenderness ratio on AFRP columns. Eighteen full-scale were grouped into 6 categories including 3 specimens without reinforcements. Obtained used study failure modes, ultimate l...

As contemporary emerging materials, fiber-reinforced plastics/polymers (FRP) are widely used in aerospace automotive industries and other fields due to their high strength-to-weight ratio, stiffness-to-weight corrosion resistance, low thermal expansion properties. Drilling is the most frequently process industrial operation for polymer composite laminates, owing need joining structures. However...

This paper focuses on the aramid fiber-reinforced polymer (AFRP) sheet bonding method to investigate influences of volume and input impact energy failure modes strengthened RC beams. The drop-weight loading tests were conducted beams with AFRP sheets. was investigated, varying from 415 1660 g/m2. force generated by dropping a 300 kg steel weight onto midspan different heights (0.5, 1.0, 2.0, 2....

Many existing reinforced concrete structures were constructed with substandard characteristics. Low quality concrete, poor transverse reinforcement details and insufficient flexural strength are among the most common deficiencies. While substandard structures are in need of retrofitting, particularly in seismic areas, problems such as high costs and disturbance to occupants are major obstacles ...

Abstract In this study, aramid fiber-reinforced polymer (AFRP) composites were prepared and then postcured under specific heating/cooling rates. By dynamic mechanical analysis, the viscoelastic properties of AFRP at elevated temperatures various frequencies determined. Thermomechanical analysis (TMA), in modes creep-recovery stress–relaxation tests, was also performed. Furthermore, differential...

Experimental investigations were conducted to assess the influence of Abrasive Water Jet Machining (AWJM) process parameters on surface roughness (Ra) and kerf taper ratio (TR) of aramid fibre reinforced plastics (AFRP) composite. The approach was based on Taguchi’s Method and Analysis of Variance (ANOVA) to optimize the AWJM process parameters for effective machining. It was found that travers...