Efficiency of different BFRP-based strengthening techniques in improving flexural behavior of RC slabs

This paper presents both experimental and analytical research results for predicting the flexural capacity of reinforced concrete (RC) slabs strengthened in flexure with basalt fabric-reinforced cementitious matrix (FRCM). A total of 13 specimens were fabricated to evaluate the flexural behavior of RC slabs strengthened with basalt FRCM composite and were tested under four-point loading. The fiber type, tensile reinforcement ratio, and the number of fabric layers were chosen as experimental variables. The maximum load of FRCM-strengthened specimens increased from 11.2% to 98.2% relative to the reference specimens. The energy ratio and ductility of the FRCM-strengthened specimens decreased with the higher amount of fabric and tensile reinforcement. The effective stress level of FRCM fabric can be accurately predicted by a bond strength of ACI 549 and Jung’s model.

Download Full-text

Flexural Behavior of Preloaded RC Slabs Strengthened with Prestressed CFRP Laminates

Journal of Composites for Construction ◽

10.1061/(asce)cc.1943-5614.0000421 ◽

2014 ◽

Vol 18 (3) ◽

Cited By ~ 12

Author(s):

Renata Kotynia ◽

Krzysztof Lasek ◽

Michal Staskiewicz

Keyword(s):

Flexural Behavior ◽

Cfrp Laminates ◽

Rc Slabs

Download Full-text

Flexural Strengthening of RC Slabs with SRP/SRG: An Experimental-Numerical Comparison

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.847.381 ◽

2016 ◽

Vol 847 ◽

pp. 381-390 ◽

Cited By ~ 1

Author(s):

Annalisa Napoli ◽

Roberto Realfonzo ◽

Massimo Petracca ◽

Francesca Candeloro ◽

Guido Camata ◽

...

Keyword(s):

Nonlinear Behavior ◽

Cost Effective ◽

Flexural Behavior ◽

Numerical Comparison ◽

Cross Sectional ◽

Rc Structures ◽

Flexural Strengthening ◽

Numerical Predictions ◽

Reinforced Polymer ◽

Rc Slabs

Steel reinforced polymer (SRP) and steel reinforced grout (SRG) systems have emerged as promising and cost-effective technologies for the external strengthening of RC structures. An experimental campaign was recently performed to investigate the effectiveness of SRG/SRP systems in increasing the flexural strength of RC slabs. Test results are herein used to validate a Fiber based finite element code developed with the aim of simulating the flexural behavior of SRP/SRG strengthened RC beams/slabs. The model provides an accurate prediction of the cross-sectional response by explicitly modeling each constituent, their position inside the discretized cross-section, and their nonlinear behavior. The satisfactory comparison between numerical predictions and experimental results assessed the accuracy of the developed code.

Download Full-text