Flexural behavior of RC beams strengthened with BFRP bars-reinforced ECC matrix

2020 ◽  
Vol 241 ◽  
pp. 112092 ◽  
Author(s):  
Wei Hou ◽  
Zhi-Qiang Li ◽  
Wan-Yang Gao ◽  
Pan-Deng Zheng ◽  
Zi-Xiong Guo
Keyword(s):  
Flexural Behavior ◽  
Rc Beams

Susceptibility of strain-hardening cementitious composite to curing conditions as a retrofitting material for RC beams

2021 ◽  
Vol 16 ◽  
pp. 155892502110203
Author(s):  
Mohammad Iqbal Khan ◽  
Galal Fares ◽  
Yassir Mohammed Abbas ◽  
Wasim Abbass ◽  
Sardar Umer Sial
Keyword(s):  
Strain Hardening ◽  
Environmental Conditions ◽  
Carrying Capacity ◽  
Flexural Behavior ◽  
Load Carrying Capacity ◽  
Rc Beams ◽  
Curing Conditions ◽  
Flexural Members ◽  
Load Carrying ◽  
Curing Regime

Strain-hardening cement-based composites (SHCC) have recently been developed as repair materials for the improvement of crack control and strength of flexural members. This work focuses on strengthening and flexural enhancement using SHCC layer in tensile regions of flexural members under three different curing conditions. The curing conditions simulate the effect of different environmental conditions prevailing in the central and coastal regions of the Arabian Peninsula on the properties of SHCC as a retrofitting material. In this investigation, beams with SHCC layer were compared to control beams. The beams with SHCC layer of 50-mm thickness were cast. The results revealed that the flexural behavior and the load-carrying capacity of the normal concrete beam specimens under hot and dry environmental conditions were significantly reduced, lowering the ductility of the section. However, compressive strength is comparatively unaffected. Similarly, the hot curing conditions have also led to a notable reduction in the loading capacity of the beam with SHCC layer with a slight effect on its stiffness. On the other hand, steam-curing conditions have shown improvement in load-carrying capacity and a reduction in section ductility of the beam with SHCC layer. It was found that the structural unit retrofitted with SHCC layer was a curing-regime dependent as the tensile and strain-hardening properties of SHCC are highly sensitive to the alteration in the cement hydration process. A normal curing regime was found effective and satisfying the practical, cost, and performance requirements. Accordingly, a normal curing regime could be implemented to retrofit reinforced concrete (RC) beams with SHCC layers as recommended in the study.

Experimental study on the flexural behavior of RC beams strengthened with prestressed BFRP laminates

2021 ◽  
Vol 233 ◽  
pp. 111801
Author(s):  
Changyuan Liu ◽  
Xin Wang ◽  
Jianzhe Shi ◽  
Lulu Liu ◽  
Zhishen Wu
Keyword(s):  
Experimental Study ◽  
Flexural Behavior ◽  
Rc Beams

scholarly journals Effect of loading rate on flexural behavior of concrete and reinforced concrete beams

2021 ◽  
Vol 15 (3) ◽  
pp. 136-143
Author(s):  
Nguyen Trung Hieu ◽  
Nguyen Van Tuan
Keyword(s):  
Reinforced Concrete ◽  
Loading Rate ◽  
Plain Concrete ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Displacement Curve ◽  
Rc Beams ◽  
Three Point Bending ◽  
Loading Rates ◽  
Hydraulic Servo

The elasto-plastic characteristics of plain concrete are inevitably affected by the loading rate. This paper presents an experimental investigation on the effect of loading rate on flexural behavior of concrete and reinforced concrete (RC) beams, which was carried out with Walter+bai electro-hydraulic servo system. Three-point bending tests on 100 × 100 × 400 mm prismatic concrete samples and 80 × 120 × 1100 mm RC beams with different displacement controlled loading rates of 0.01 mm/min, 0.1 mm/min, and 3 mm/min were imposed. Based on the test results, the effects of loading rates on the load-displacement curve, cracking, and ultimate load-carrying capacities of RC beams were evaluated.

scholarly journals Study on Flexural Behavior of Steel Fiber RC Beams Confined With Biaxial Geo-Grid

2017 ◽  
Vol 173 ◽  
pp. 1431-1438 ◽  
Author(s):  
S. Sivakamasundari ◽  
A. Joshua Daniel ◽  
Arun Kumar
Keyword(s):  
Steel Fiber ◽  
Flexural Behavior ◽  
Rc Beams

scholarly journals Assessment of the flexural behavior of continuous RC beams strengthened with NSM-FRP bars, experimental and analytical study

2020 ◽  
Vol 242 ◽  
pp. 112127 ◽  
Author(s):  
Mohammad Abdallah ◽  
Firas Al Mahmoud ◽  
Abdelouahab Khelil ◽  
Julien Mercier ◽  
Belal Almassri
Keyword(s):  
Analytical Study ◽  
Flexural Behavior ◽  
Rc Beams ◽  
Frp Bars

Influence of steel fibers on the flexural behavior of RC beams with low reinforcing ratios: Analytical and experimental investigation

2019 ◽  
Vol 222 ◽  
pp. 110926 ◽  
Author(s):  
Daniel C.T. Cardoso ◽  
Gabriel B.S. Pereira ◽  
Flávio A. Silva ◽  
Julio J.H. Silva Filho ◽  
Eric V. Pereira
Keyword(s):  
Experimental Investigation ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Rc Beams
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