scholarly journals ULTIMATE SHEAR STRENGTH OF EXISTING STEEL REINFORCED CONCRETE MEMBERS WITH LOW-STRENGTH CONCRETE

2019 ◽  
Vol 84 (761) ◽  
pp. 983-992
Author(s):  
KJU KJU NWE ◽  
Kazushi SADASUE ◽  
Hideo ARAKI
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Ultimate Shear Strength ◽  
Steel Reinforced Concrete ◽  
Strength Concrete ◽  
Concrete Members ◽  
Low Strength ◽  
Low Strength Concrete

scholarly journals EVALUATION OF SHEAR STRENGTH FOR LOW STRENGTH CONCRETE MEMBERS

2010 ◽  
Vol 16 (32) ◽  
pp. 139-144 ◽  
Author(s):  
Akira YASOJIMA ◽  
Hideo ARAKI ◽  
Takashi MATSUI ◽  
Hiroaki TANIGUCHI
Keyword(s):  
Shear Strength ◽  
Strength Concrete ◽  
Concrete Members ◽  
Low Strength ◽  
Low Strength Concrete

Low strength concrete members externally confined with FRP sheets

2004 ◽  
Vol 18 (2) ◽  
pp. 167-194 ◽  
Author(s):  
Alper Ilki ◽  
Nahit Kumbasar ◽  
Volkan Koc
Keyword(s):  
Strength Concrete ◽  
Concrete Members ◽  
Low Strength ◽  
Low Strength Concrete

scholarly journals Strengthening of Low-Strength Concrete Columns with Fibre Reinforced Polymers. Full-Scale Tests

2020 ◽  
Vol 5 (11) ◽  
pp. 91
Author(s):  
Sonia Martínez ◽  
Ana de Diego ◽  
Viviana J. Castro ◽  
Luis Echevarría ◽  
Francisco J. Barroso ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Columns ◽  
Experimental Program ◽  
Small Scale ◽  
Rc Columns ◽  
Reinforced Polymers ◽  
Strain Capacity ◽  
Strength Concrete ◽  
Low Strength ◽  
Low Strength Concrete

Confinement of columns with externally bonded fibre reinforced polymers (FRP) sheets is an easy and effective way of enhancing the load carrying and strain capacity of reinforced concrete (RC) columns. Many experimental studies have been conducted on cylindrical small-scale un-reinforced concrete specimens externally confined with FRP. It is widely accepted that confinement of square or rectangular columns is less efficient than the confinement of circular columns. The theoretical models for rectangular sections are mostly based on approaches for circular columns modified by a shape factor, but the different models do not give similar results. This paper presents an experimental program on large-scale square and rectangular RC columns externally strengthened with carbon FRP sheets and subjected to axial load. The main variables were the side-aspect ratio of the cross-section, the radius of curvature of the corners and the amount of FRP reinforcement. The results show that the FRP confinement can increase the strength and strain capacity of rectangular concrete columns with low strength concrete. The FRP hoop ultimate strain was much lower than the material ultimate tensile strain obtained from flat coupon tests and the strain efficiency factor achieved in the tests was less than the value usually recommended by design guides.

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