Retrofitting of different types of reinforced concrete beams after exposed to elevated temperature

2019 ◽  
Vol 194 ◽  
pp. 420-430 ◽  
Author(s):  
Ahmed Hassan ◽  
Faisal Aldhafairi ◽  
L.M. Abd-EL-Hafez ◽  
A.E.Y. Abouelezz
Keyword(s):  
Reinforced Concrete ◽  
Elevated Temperature ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Different Types

Calculation of Flexural Capacity of High-Strength Reinforced Concrete Beams Strengthened with FRP

2011 ◽  
Vol 71-78 ◽  
pp. 815-817 ◽  
Author(s):  
Jiong Feng Liang ◽  
Ze Ping Yang ◽  
Zhi Ming Qiu
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Engineering Application ◽  
High Strength ◽  
Correlation Equation ◽  
Reinforced Concrete Beams ◽  
Flexural Capacity ◽  
Different Types ◽  
Fiber Reinforce ◽  
Good Agreement

The mechanical properties of high-strength reinforced concrete beams strengthened with FRP ( fiber reinforce polymer) are further investigated theoretically including it s failure mechanism and loadability,based on earlier theoretical works on RC beams. And the correlation equation of flexural capacity on the cross section of high-strength reinforced concrete beams strengthened with FRP is deduced according to different types of failure.The correlation equation is shown to be in good agreement with the experimental results, which can be referred to engineering application.

The Behavior of Reinforced and Pre-Stressed Concrete Beams under Elevated Temperature

2020 ◽  
Vol 47 ◽  
pp. 15-30
Author(s):  
Amr H. Badawy ◽  
Ahmed Hassan ◽  
Hala El-Kady ◽  
L.M. Abd-El Hafez
Keyword(s):  
Reinforced Concrete ◽  
Elevated Temperature ◽  
Prestressed Concrete ◽  
Mechanical Performance ◽  
Concrete Beams ◽  
Load Capacity ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Second Phase ◽  
Prestressed Beam

The behavior of unbounded post tension and reinforced concrete beams under elevated temperature was presented. The experimental work was consisted of two major phases. In the first phase, the objective was studying the mechanical performance of prestressed beam, prestressed beam with steel addition and reinforced concrete beams respectively were studied. In the second phase, the residual mechanical performance of prestressed beam, prestressed beam with steel addition and reinforced concrete beams under elevated 400oC, for 120 minutes durations. The failure mechanisms, ultimate load capacity, and deflection at critical sections were monitored. The numerical prediction of the flexural behavior of the tested specimens is presented in this paper. This includes a comparison between the numerical and experimental test results according to ANSYS models. The results indicate that the prestressed beam with steel addition and reinforced concrete beams had higher resistance to beams under elevated 400oC than that of prestressed concrete beam in terms of ultimate capacity. It is also shown that the reinforced concrete beams have higher resistance to beams under elevated temperature than that of prestressed beam, prestressed beam with steel addition.

scholarly journals Strength and Ductility of Bubbled Wide Reinforced Concrete Beams with Diverse Types of Shear Steel Plates

2018 ◽  
Vol 7 (4.20) ◽  
pp. 502 ◽  
Author(s):  
Amer Mohamed Ibrahim ◽  
Ahmed Abdullah Mansor ◽  
Wissam D. Salman ◽  
Mohammed Jaafar Hamood
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Concrete Beams ◽  
Good Alternative ◽  
Reinforced Concrete Beams ◽  
Steel Plates ◽  
Cross Sectional ◽  
Service Load ◽  
Different Types ◽  
Strength And Ductility

This paper presents an experimental investigation on the strength of bubbled wide reinforced concrete beams with different types of shear steel plates. Eight specimens with dimensions of 215x560x1800mm were investigated. The studied variables deal with replacement of 10mm stirrups diameter stirrups spaced at 125mm by shear steel plates having equivalent cross-sectional area for stirrups at mid legs height with circular opening of different thicknesses (3, 4 and 5mm). Four specimens were without any bubbles and the others with bubbles. This study showed that the shear steel plates is a good alternative for replacing the stirrups and gives increasing in yield, ultimate load and deflection (at service load) with 5% , 15% and 9% on the average when using the bubbles. Without using bubbles, the aspect ratio of shear steel plates bounded between the boundaries 4.5 to 8 gave increased the ductility by 36%. Using the bubbles in specimens was decreased 4.7% from the total weight of specimens. ACI 318-14(1) and EC 2(2) codes give a predicted deflection more than that obtained from experimental results by 16% on the average and by 24% when using bubbles.    

scholarly journals A Study of Flexural and Bending Strength of Steel, Polypropylene and Hybrid Fibre Reinforced Concrete without Adding Admixture

2018 ◽  
Vol 7 (2.24) ◽  
pp. 278
Author(s):  
M Tamil Selvi ◽  
Dasarathy A K ◽  
T S. Thandavamoorthy ◽  
FIE . ◽  
FIIT Arb ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Bending Strength ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Hybrid Fibers ◽  
Flexural Response ◽  
Hybrid Fibre ◽  
Deformation Properties ◽  
Different Types ◽  
Strength And Deformation

The present study has been taken up for evaluating the different types of concrete. Emphasis has been given to the strength and deformation properties of reinforced concrete beams.  This  paper  presents  the  results  of  an  experimental investigation carried out on four different types reinforced concrete beams, 150 mm  × 150  mm  × 700 mm in size. The beams were tested under one-third point loading. The results exhibited that the flexural strength of concrete are meaningfully improved by adding  steel, polypropylene and hybrid fibers.  Out of the three different types of fibers used in this study, the fibers with steel and hybrid showed better efficiency in improving the flexural response.  

3D numerical analysis of reinforced concrete beams exposed to elevated temperature

2014 ◽  
Vol 58 ◽  
pp. 166-174 ◽  
Author(s):  
Joško Ožbolt ◽  
Josipa Bošnjak ◽  
Goran Periškić ◽  
Akanshu Sharma
Keyword(s):  
Reinforced Concrete ◽  
Elevated Temperature ◽  
Numerical Analysis ◽  
Concrete Beams ◽  
Reinforced Concrete Beams
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