scholarly journals Shear strengthening of RC beams with thin panels of mortar reinforced with recycled steel fibres

2018 ◽  
Vol 194 ◽  
pp. 112-126 ◽  
Author(s):  
Lúcio Lourenço ◽  
Ziaaddin Zamanzadeh ◽  
Joaquim A.O. Barros ◽  
Mohammadali Rezazadeh
Keyword(s):  
Rc Beams ◽  
Shear Strengthening ◽  
Steel Fibres ◽  
Recycled Steel

scholarly journals Laboratory Tests of Concrete Beams Reinforced with Recycled Steel Fibres and Steel Bars

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6752
Author(s):  
Małgorzata Pająk ◽  
Grzegorz Wandzik
Keyword(s):  
Tensile Tests ◽  
Image Correlation ◽  
Partial Replacement ◽  
Rc Beams ◽  
Bending Tests ◽  
Steel Fibres ◽  
Four Point Bending ◽  
Steel Bars ◽  
Cracking Pattern ◽  
Recycled Steel

This paper explores the possibility of the partial replacement of the longitudinal reinforcement in reinforced concrete (RC) beams with recycled steel fibres (RSF). Testing was focused on the contribution of two volume ratios of the RSF—0.5%, 1.0%. Basic compression and flexural tensile tests were performed to evaluate the effectiveness of the fibres following current standards. Additionally, the full-scale beams with and without conventional reinforcement were subjected to four-point bending tests. The results indicate that RSF improved the load-bearing capacity of the RC beams. Cooperation of RSF with the steel bars in carrying loads was proved. Findings from the Digital Image Correlation (DIC) revealed no impact on the cracking pattern of the RC beams.

Effect of Steel Fibres on Flexural Toughness of Concrete and RC Beams

2021 ◽  
Author(s):  
Fuat Köksal ◽  
Kuppala Srinivasa Rao ◽  
Ziyafeddin Babayev ◽  
Mehmet Kaya
Keyword(s):  
Rc Beams ◽  
Steel Fibres ◽  
Flexural Toughness

scholarly journals Characterization and application of FRCM as a strengthening material for shear-critical RC beams

2018 ◽  
Vol 199 ◽  
pp. 09004
Author(s):  
Adel Younis ◽  
Usama Ebead
Keyword(s):  
Shear Capacity ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Shear Strengthening ◽  
Structural Capacity ◽  
Test Parameters ◽  
Study Results ◽  
Glass Carbon ◽  
Characterization Test ◽  
Fabric Reinforced Cementitious Matrix

This paper investigates the effectiveness of fabric reinforced cementitious matrix (FRCM) systems in shear-strengthening of reinforced concrete beams. Three types of FRCM systems were considered, namely, polyparaphenylene benzobisoxazole (PBO)-FRCM, Carbon-FRCM, and Glass-FRCM. At first, tensile characterization test was performed on 15 FRCM coupons with the aim of identifying the tensile properties of the FRCM systems adopted. After that, seven shear-critical RC beams were tested under three-point loading, with the consideration of two test parameters: (a) FRCM material (glass/carbon/PBO); and (b) strengthening configuration (full/intermittent). The study results revealed the use of FRCM as a strengthening material to achieve a considerable improvement in the structural capacity of shear-critical RC beams. The average gain in the shear capacity of the FRCM-strengthened beams was 57%. The beam specimens strengthened with carbon-FRCM showed the highest improvement as compared to those strengthened with glass-and PBO-FRCM systems. As intuitively expected, the shear capacity improvement achieved with the full-length strengthening systems was generally higher than that with the intermittent counterparts.

scholarly journals Shear Strengthening of RC Beams Subjected to Cyclic Load Using CFRP Strips

2008 ◽  
Vol 17 (6) ◽  
pp. 096369350801700 ◽  
Author(s):  
Gokhan Sakar
Keyword(s):  
Cyclic Load ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Rc Beams ◽  
Carbon Fabric ◽  
Shear Strengthening ◽  
Shear Design ◽  
Beam Shear ◽  
Fabric Shear ◽  
Composite Carbon

An experimental investigation was conducted to study the effect of composite carbon fabric shear reinforcement on the ultimate strength and behaviour of reinforced concrete beam. Shear deficient specimens were strengthened by using side-bonded and wrapped CFRP straps. Eight beams were fabricated and tested under the cyclic loads. The main objective of the study is to obtain ductile flexural behaviour from the shear deficient RC beams. To verify the reliability of shear design equations and guidelines, experimental results were compared with all common guidelines and published design equations.

scholarly journals Embedded Connector in Severe Optimization of Steel Plate for Shear Strengthening of RC Beam: Experimental and Numerical Investigations

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Md. Ashraful Alam ◽  
Suliman A. Bakkar ◽  
Shahnawaz A. Onik ◽  
Kamal N. Mustapha
Keyword(s):  
Shear Failure ◽  
Steel Plate ◽  
Maximum Load ◽  
Rc Beams ◽  
Reinforced Concrete Structure ◽  
Shear Strengthening ◽  
Maximum Increase ◽  
Numerical Investigations ◽  
Externally Bonded ◽  
Major Factors

Environmental impact has become one of the major factors taken into consideration for recent civil engineering studies and projects. Thus, researchers have been concentrating on shear strengthening of existing reinforced concrete structure as an upgrade method instead of demolishing and reconstructing. In general, shear strengthening of RC beams using externally bonded steel plate has gained huge popularity. However, premature debonding of plates is the main drawback of the system, which could be mitigated using embedded connector; thus, the dimension of steel plate could be reduced significantly. Furthermore, numerical analysis on shear strengthening of beams using embedded connector would provide a great insight on the structural behavior. The aim of this research is to severely reduce the dimension of the steel plate using embedded connector for shear strengthening of RC beams and to investigate the performances of optimized shear-strengthened beams through experimental and numerical investigations. The results showed that the dimension of plate was reduced without debonding of the plate if the beam was designed for shear strengthening with the consideration of yield strength of steel plate and shear link. Experimental results showed a maximum increase in failure of 24%. The numerical results predicted accurately the structural performance of beams. The embedded connector had a great effect in deferring and minimizing the debonding failure and accordingly increasing the maximum load of shear failure between 14.5% and 24% compared to control beam.

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