Effect of shear span-depth ratio on mechanical performance of RC beams strengthened in shear with U-wrapping FRP strips

2017 ◽  
Vol 177 ◽  
pp. 141-157 ◽  
Author(s):  
Weiwen Li ◽  
Christopher K.Y. Leung
Keyword(s):  
Mechanical Performance ◽  
Rc Beams ◽  
Shear Span ◽  
Depth Ratio ◽  
Frp Strips

scholarly journals Shear Behaviour of RC Beams Strengthened by Various Ultrahigh Performance Fibre-Reinforced Concrete Systems

2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
Walid Mansour ◽  
Bassam A. Tayeh
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Performance ◽  
Experimental Studies ◽  
Element Model ◽  
Shear Behaviour ◽  
Fibre Reinforced Concrete ◽  
Rc Beams ◽  
Shear Span ◽  
Depth Ratio ◽  
Normal Strength

This study presents a numerical investigation on the shear behaviour of shear-strengthened reinforced concrete (RC) beams by using various ultrahigh performance fibre-reinforced concrete (UHPFRC) systems. The proposed 3D finite element model (FEM) was verified by comparing its results with those of experimental studies in the literature. The validated numerical model is used to analyse the crucial parameters, which are mainly related to the design of RC beams and shear-strengthened UHPFRC layers, such as the effect of shear span-to-depth ratio on the shear behaviour of the strengthened or nonstrengthened RC beams and the effect of geometry and length of UHPFRC layers. Moreover, the effect of the UHPFRC layers’ reinforcement ratio and strengthening of one longitudinal vertical face on the mechanical performance of RC beams strengthened in shear with UHPFRC layers is investigated. Results of the analysed beams show that the shear span-to-depth ratio significantly affects the shear behaviour of not only the normal-strength RC beams but also the RC beams strengthened with UHPFRC layers. However, the effect of shear span-to-depth ratio has not been considered in existing design code equations. Consequently, this study suggests two formulas to estimate the shear strength of normal-strength RC beams and UHPFRC-strengthened RC beams considering the effect of the shear span-to-depth ratio.

Shear Behavior of RC Beams with Corroded Stirrups Strengthened Using FRP Laminates: Effect of the Shear Span-to-Depth Ratio

2020 ◽  
Vol 24 (4) ◽  
pp. 04020033 ◽  
Author(s):  
Weiwen Li ◽  
Zeqi Huang ◽  
Zefeng Huang ◽  
Xu Yang ◽  
Tiansheng Shi ◽  
...  
Keyword(s):  
Shear Behavior ◽  
Rc Beams ◽  
Shear Span ◽  
Depth Ratio

SHEAR BEHAVIOR OF REINFORCED CONCRETE SLENDER BEAMS

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Muhammad K. Kayani ◽  
Wasim Khaliq ◽  
Muhammad K. Shehzad
Keyword(s):  
Reinforced Concrete ◽  
Shear Behavior ◽  
Shear Capacity ◽  
Experimental Program ◽  
Longitudinal Reinforcement ◽  
Rc Beams ◽  
Shear Reinforcement ◽  
Shear Span ◽  
Depth Ratio ◽  
Slender Beams

Major factors contributing to the shear behavior in reinforced concrete (RC) beams have been identified as compressive strength of concrete, shear span to effective depth ratio, and longitudinal reinforcement. Though significant, few of these factors are not fully incorporated in ACI code provisions for design of minimum shear reinforcement. To investigate the effect of these parameters, an analytical and experimental study was undertaken on the shear behavior of ordinary strength RC slender beams with moderate longitudinal reinforcement. The experimental program consisted of testing of eight simply supported RC slender beams subjected to two concentrated loads at a shear span to depth ratio (a/d) of 2.5 and equipped with varying shear reinforcement according to four different criteria. Ultimate shear strengths obtained in this experimental program are compared to the analytical shear strengths calculated according to existing as well as proposed equations. Test results exhibit that, the modified equation proposed in this work gives more accurate prediction of shear capacity of RC beams.

Influence of Loading Rate on Shear Failure Resistance of RC Beams

2011 ◽  
Vol 82 ◽  
pp. 229-234 ◽  
Author(s):  
Takashi Fukuda ◽  
Shotaro Sanuki ◽  
Masaki Miyakawa ◽  
Kazunori Fujikake
Keyword(s):  
Shear Failure ◽  
Loading Rate ◽  
Reinforcement Ratio ◽  
Failure Behavior ◽  
Rc Beams ◽  
Shear Reinforcement ◽  
Loading Test ◽  
Shear Span ◽  
Depth Ratio ◽  
Rapid Loading

The aim of this study was to investigate the dynamic shear failure behavior of RC beams under rapid loading through an experimental study. Thus, rapid loading test for 48 RC beams was performed, in which shear span-to-depth ratio, shear reinforcement ratio and loading rate were variable. The RC beams exhibited diagonal tension failure, shear compression failure and flexural failure depending mainly on the shear span-to-depth ratio and the shear reinforcement ratio. The influence of loading rate on the maximum resistance is more significant for the RC beams failed in shear than for those failed in flexure.

Effect of shear-span/depth ratio on debonding failures of FRP-strengthened RC beams

2020 ◽  
Vol 32 ◽  
pp. 101771
Author(s):  
Mohammed A. Al-Saawani ◽  
Ahmed K. El-Sayed ◽  
Abdulaziz I. Al-Negheimish
Keyword(s):  
Rc Beams ◽  
Shear Span ◽  
Depth Ratio
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