Reinforced concrete (RC) structures require strengthening for numerous factors, such as increased load, modification of the structural systems, structural upgrade or errors in the design and construction stages. The side near-surface mounted (SNSM) strengthening technique with glass fiber-reinforced polymer (GFRP) bars is a relatively new emerging technique for enhancing the flexural capacities...

In this paper we propose an empirical analysis of deep recurrent neural networks (RNNs) with stacked layers. The analysis aims at the study and proposal of approaches to develop and enhance multiple timescale and hierarchical dynamics in deep recurrent architectures, within the efficient Reservoir Computing (RC) approach for RNN modeling. Results point out the actual relevance of layering and R...

Debonding failure is the main failure mode in flexurally strengthened reinforced concrete beams by externally bonded or near surface mounted fibre reinforced polymer (FRP) composites. It is believed that FRP debonding will be initiated if the shear stress on the concrete-FRP interface reaches the tensile strength of concrete. However, it was found through experimental and analytical studies tha...

The aim of this study is to investigate the influence fiber reinforcement polymer (FRP) on shear behavior concrete (RC) beams with various guidelines. FRP thickness, beam depth and strength at ultimate load are considered as main parameters. A finite element (FE) by using ANSYS computer program was used analyze reinforced beams. numerical models were effect depth, strength, CFRP sheet configura...

Fibre reinforced polymer (FRP) is one of the best retrofitting materials for strengthening due to a number of advantages, such as excellent strength to self-weight ratio, large fatigue resistance capacity, etc. Presently, many different types of FRP models are used in analysis, thereby creating erroneous analytical results. Reinforced concrete (RC) beams with carbon and glass fibrereinforced po...

The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The va...

Reinforced concrete (RC) beams may require flexural strengthening due to the corrosion of reinforcing bars or changes in design load. The near surface mounted (NSM) and externally bonded (EB) techniques, using either glass carbon fibre-reinforced polymer (GFRP CFRP) composites, are used for deficient RC beams. However, strengthened with both techniques susceptible debonding failure FRP composit...

This paper presents an experimental work to investigate the effect of fatigue loading and high service temperature on flexural performance near-surface mounted (NSM) carbon fiber reinforced polymer (CFRP)-strengthened concrete (RC) beams. The program included 11 beams, where strengthening (CFRP) ratio (0.06 % 0.18 %), load level (R1 = 0.57 R2 0.38) applied (20 °C 70 °C) have been considered. Ex...

Tests of deep concrete beams with internal fiber-reinforced polymer (FRP) reinforcement have shown that such members can exhibit lower shear strength than members with conventional steel reinforcement. To model this effect, the current paper proposes an approach based on a two-parameter kinematic theory (2PKT) for conventional deep beams. The 2PKT is built on a kinematic model with two degrees ...

this paper presents the results of analytical studies concerning the flexuralstrengthening of reinforced concrete beams by external bonding of high-strength lightweightcarbon fiber reinforced plastic (cfrp) plates to tension face of the beam. three groups of beamswere tested analytically and compared with existing experimental results. results of the numericalanalyses showed that, although addi...