Stress versus strain relationship of high strength concrete under high lateral confinement

1999 ◽  
Vol 29 (12) ◽  
pp. 1977-1982 ◽  
Author(s):  
D.P Candappa ◽  
S Setunge ◽  
J.G Sanjayan
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Lateral Confinement ◽  
Strength Concrete ◽  
Strain Relationship ◽  
Relationship Of ◽  
Versus Strain

Strength and Ductility of High-Strength Concrete Cylinders Externally Confined with Steel Strapping Tensioning Technique (SSTT)

2014 ◽  
Vol 68 (1) ◽  
Author(s):  
Hoong-Pin Lee ◽  
Abdullah Zawawi Awang ◽  
Wahid Omar
Keyword(s):  
Compressive Strength ◽  
Prediction Model ◽  
High Strength Concrete ◽  
High Strength ◽  
Transverse Strain ◽  
Envelope Curve ◽  
Stress Strain ◽  
Strength Concrete ◽  
Concrete Cylinders ◽  
Strain Relationship

This research study is to introduce and investigate an effective technique of external pre-tensioning using steel strapping (SSTT) to reduce the brittleness and enhance the ductility of high-strength concrete cylinders.  Fifteen cylinders with dimension of 150 mm and 300 mm in diameter and height respectively were casted, pre-tensioned with two and four layers of steel strapping and tested to failure under uniaxial monotonic and cyclic compression. The behaviour of SSTT confined cylinders was studied through their stress-strain relationship upon the longitudinal deflection, transverse strain, mode of failure, confinement ratio, and existence of an envelope curve. It is experimentally proved that SSTT confinement do helps in controlling the brittleness problem of high-strength concrete and at the same time, enhancing both the concrete ductility and compressive strength up to 46.2 % and 112.5 % respectively. The envelope curve of uniaxial cyclic loading also coincides with the corresponding monotonic loading curve, regardless of any loading activity. The observed stress-strain relationship of confined cylinders with different confining ratios are compared with existing strength and strain models and a stress-strain prediction model, the result showed a linear relationship between the compressive strength and strain enhancement and confining ratio, with acceptable agreement between the prediction model.

Nonlinear Numerical Simulation Analysis on Mechanical Behavior of High-Strength Concrete Beams Reinforced by HRBF500 Steel

2012 ◽  
Vol 166-169 ◽  
pp. 1607-1613
Author(s):  
Li Juan Liu ◽  
Xian Guo Ye ◽  
Xun Chong ◽  
Qing Jiang ◽  
Lin Lin Xie
Keyword(s):  
Mechanical Behavior ◽  
High Strength Concrete ◽  
Simulation Analysis ◽  
Concrete Strength ◽  
High Strength ◽  
Constitutive Relationship ◽  
Strength Concrete ◽  
Concrete Members ◽  
Nonlinear Numerical Simulation ◽  
Relationship Of

Mechanical Behavior of 3 high-strength concrete simply supported beams reinforced by HRBF500 steel with different stirrup ratio are simulated by software OpenSees .In order to establish the constitutive relationship of high-strength concrete more accurately, some parameters of modified Kent-Park were adjusted partly. Furthermore, the restraining effect of different stirrup ratio to the core concrete is considered by the concrete strength rasied coefficient k. The analysis results matched the test ones well, indicating that the OpenSees program is effective to simulate the mechanical behavior of high-strength concrete members reinforced by high-strength steel.

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