Behaviour of reinforced concrete rectangular columns strengthened using GFRP

2007 ◽  
Vol 29 (8) ◽  
pp. 609-615 ◽  
Author(s):  
R. Kumutha ◽  
R. Vaidyanathan ◽  
M.S. Palanichamy
Keyword(s):  
Reinforced Concrete ◽  
Rectangular Columns

SEISMIC PERFORMANCE OF GFRP-RC RECTANGULAR COLUMNS: NUMERICAL STUDY

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ehab El-Salakawy ◽  
Fangxin Ye ◽  
Yasser Mostafa Selmy
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Loading ◽  
Axial Load ◽  
Numerical Study ◽  
Concrete Strength ◽  
Weight Ratio ◽  
Concrete Columns ◽  
Load Level ◽  
Reinforced Concrete Columns ◽  
Rectangular Columns

Composite materials like glass fiber-reinforced polymer (GFRP) is becoming widely acceptable to be used as a reinforcing material due to its high ultimate tensile strength-to-weight ratio and excellent resistance to corrosion. However, the seismic behavior of GFRP-reinforced concrete columns has not been fully investigated yet. This paper presents the results of a numerical analysis of full-size GFRP-RC rectangular columns under cyclic loading. The simulated column depicts the lower part of a building column between the foundation and the point of contra-flexure at the mid-height of the column. GFRP reinforcement properties and concrete modeling based on fracture energy have been incorporated in the numerical model. Experimental validation has been used to examine the accuracy of the constructed finite element models (FEMs) using a commercially available software. The validated FEM was used to perform a parametric study, considering several concrete strength values and axial load levels, to study its influence on the performance of the GFRP-reinforced concrete columns under cyclic loading. It was concluded that the hysteretic dissipation capacity deteriorates under high axial load level due to severe softening of the concrete. The FE results showed a substantial improvement of the lateral load-carrying capacities by increasing concrete compressive strength.

scholarly journals EXPERIMENTAL PROGRAM FOR REINFORCED CONCRETE RECTANGULAR COLUMNS CONFINED BY RECTANGULAR TIES

2016 ◽  
Vol 11 (39) ◽  
pp. 481-491
Author(s):  
Mohamed Mohamed Shanan ◽  
Ahmed Hasan Anis ◽  
Ashraf El-Zanati ◽  
Kamal Metwally
Keyword(s):  
Reinforced Concrete ◽  
Experimental Program ◽  
Rectangular Columns

Discussion of “Reinforced Concrete Rectangular Columns in Torsion”

1969 ◽  
Vol 95 (11) ◽  
pp. 2528-2535
Author(s):  
S. N. Lim ◽  
M. S. Mirza ◽  
N. C. Sinha ◽  
P. K. Gayen
Keyword(s):  
Reinforced Concrete ◽  
Rectangular Columns

Closure to “Reinforced Concrete Rectangular Columns in Torsion”

1971 ◽  
Vol 97 (3) ◽  
pp. 953-954
Author(s):  
Alfred Bishara ◽  
Jong-Cheng Peir
Keyword(s):  
Reinforced Concrete ◽  
Rectangular Columns

scholarly journals Evaluation of punching shear strength of flat slabs supported on rectangular columns

2018 ◽  
Vol 33 ◽  
pp. 02007 ◽  
Author(s):  
Valery Filatov
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Concrete Slab ◽  
Structural Parameters ◽  
Experimental Studies ◽  
Punching Shear ◽  
Design Solution ◽  
Concrete Slabs ◽  
Reinforced Concrete Slabs ◽  
Rectangular Columns

The article presents the methodology and results of an analytical study of structural parameters influence on the value of punching force for the joint of columns and flat reinforced concrete slab. This design solution is typical for monolithic reinforced concrete girderless frames, which have a wide application in the construction of high-rise buildings. As the results of earlier studies show the punching shear strength of slabs at rectangular columns can be lower than at square columns with a similar length of the control perimeter. The influence of two structural parameters on the punching strength of the plate is investigated - the ratio of the side of the column cross-section to the effective depth of slab C/d and the ratio of the sides of the rectangular column Cmax/Cmin. According to the results of the study, graphs of reduction the control perimeter depending on the structural parameters are presented for columns square and rectangular cross-sections. Comparison of results obtained by proposed approach and MC2010 simplified method are shown, that proposed approach gives a more conservative estimate of the influence of the structural parameters. A significant influence of the considered structural parameters on punching shear strength of reinforced concrete slabs is confirmed by the results of experimental studies. The results of the study confirm the necessity of taking into account the considered structural parameters when calculating the punching shear strength of flat reinforced concrete slabs and further development of code design methods.

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