Effect of confinement level, aspect ratio and concrete strength on the cyclic stress–strain behavior of FRP-confined concrete prisms

2012 ◽  
Vol 43 (2) ◽  
pp. 825-831 ◽  
Author(s):  
R. Abbasnia ◽  
R. Ahmadi ◽  
H. Ziaadiny
Keyword(s):  
Aspect Ratio ◽  
Concrete Strength ◽  
Cyclic Stress ◽  
Confined Concrete ◽  
Stress Strain ◽  
Strain Behavior ◽  
Level Aspect

Influence of Concrete Age on Compressive Behavior of FRP-Confined Concrete

2015 ◽  
Vol 744-746 ◽  
pp. 162-168 ◽  
Author(s):  
Jian Chin Lim
Keyword(s):  
Axial Strain ◽  
Concrete Strength ◽  
High Strength ◽  
Confined Concrete ◽  
Compressive Behavior ◽  
Stress Strain ◽  
Strain Behavior ◽  
Normal Strength ◽  
Frp Confinement

This paper presents the results of an experimental study on the influence of concrete age on the compressive behavior of fiber reinforced polymer (FRP)-confined normal-strength (NSC) and high-strength concrete (HSC). The first part of the paper presents the results of 18 FRP-confined and 18 unconfined concrete specimens tested at 7 and 28 days. To extend the investigation with specimens with concrete ages up to 900 days, existing test results of FRP-confined concrete was assembled from the literature. Based on observations from both short-and long-term influences of concrete age on compressive behavior of FRP-confined concrete, a number of important findings were drawn and are presented in the second part of the paper. It was observed that, at a same level of FRP confinement and unconfined concrete strength, the stress-strain behavior of FRP-confined concrete changes with concrete age. This difference is particularly pronounced at the transition zone of the stress-strain curves. It is found that, in the short-term, the ultimate condition of FRP-confined concrete is not significantly affected by the age of concrete. However, in the long-term, slight decreases in the compressive strength and the ultimate axial strain are observed with an increase in concrete age.

Cyclic Stress-Strain Behavior of Reinforcing Steel Including Effect of Buckling

1999 ◽  
Vol 125 (6) ◽  
pp. 605-612 ◽  
Author(s):  
Mario E. Rodriguez ◽  
Juan C. Botero ◽  
Jaime Villa
Keyword(s):  
Cyclic Stress ◽  
Reinforcing Steel ◽  
Stress Strain ◽  
Strain Behavior

Cyclic stress–strain behavior and load sharing in duplex stainless steels: Aspects of modeling and experiments

2007 ◽  
Vol 55 (16) ◽  
pp. 5359-5368 ◽  
Author(s):  
R. Lillbacka ◽  
G. Chai ◽  
M. Ekh ◽  
P. Liu ◽  
E. Johnson ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Load Sharing ◽  
Cyclic Stress ◽  
Duplex Stainless Steels ◽  
Stress Strain ◽  
Strain Behavior ◽  
Modeling And Experiments

Low-Cycle Fatigue Evaluation Using the Weld Master S-N Curve

2006 ◽  
Author(s):  
P. Dong ◽  
Z. Cao ◽  
J. K. Hong
Keyword(s):  
Test Data ◽  
Low Cycle Fatigue ◽  
Strain Curve ◽  
Cyclic Stress ◽  
Structural Stress ◽  
Stress Strain ◽  
Strain Behavior ◽  
Scale Test ◽  
Stress Estimation ◽  
Fatigue Evaluation

In the context of fatigue evaluation in the low-cycle regime, the use of the master S-N curve in conjunction with elastic FE-based structural stress calculations is presented. An elastic pseudo structural stress estimation is introduced by assuming that Neuber’s rule applies in relating structural stress and strain concentration at a weld to the material’s cyclic stress-strain behavior. With the pseudo structural stress procedure, recent sources of recent full scale test data on pipe and vessel welds were analyzed as a validation of the proposed procedure. The estimated fatigue lives versus actual test lives show a reasonable agreement. Finally, the feasibility of using monotonic stress-strain curves as a first approximation is also examined for applications when cyclic stress-strain curve may not be readily found. The analysis results indicate that the life estimations using monotonic stress-strain curves are reasonable, with the recent test data falling within mean ± 2σ, where σ represents the standard deviation of the master S-N curve.

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