Theoretical stress–strain model for circular concrete columns confined by GFRP spirals and hoops

2015 ◽  
Vol 102 ◽  
pp. 202-213 ◽  
Author(s):  
Mohammad Z. Afifi ◽  
Hamdy M. Mohamed ◽  
Brahim Benmokrane
Keyword(s):  
Concrete Columns ◽  
Stress Strain ◽  
Theoretical Stress ◽  
Strain Model

Compressive Stress Strain Model for Laterally Confined Concrete Columns with Steel Fibrous Composites

2021 ◽  
Vol 118 (3) ◽  
Author(s):  
Sary A. Malak ◽  
Neven Krstulovic-Opara ◽  
Rawan Sarieldine
Keyword(s):  
Compressive Stress ◽  
Concrete Columns ◽  
Confined Concrete ◽  
Fibrous Composites ◽  
Stress Strain ◽  
Strain Model

Experimental Study on Axially-Loaded Concrete Columns with Various Sizes Confined by CFRP

2013 ◽  
Vol 405-408 ◽  
pp. 706-709 ◽  
Author(s):  
Yue Ling Long ◽  
Jiang Zhu
Keyword(s):  
Experimental Study ◽  
Size Effects ◽  
Peak Stress ◽  
Plain Concrete ◽  
Concrete Columns ◽  
Experimental Results ◽  
Confined Concrete ◽  
Stress Strain ◽  
Axially Loaded ◽  
Strain Model

Eight concrete columns with various sizes confined by CFRP and four plain concrete columns as the control specimens were axially loaded to failure in order to investigate size effects in concrete columns confined by CFRP. Experimental results show that CFRP can increase considerably both the capacity and ductility of the concrete specimens. Furthermore, the peak stress of the unconfined concrete decreases with the size of the specimens increasing. Similarly, the peak stress of confined concrete decreases with the size of the specimens increasing when the lateral confining stresses are the same. Hence, the size effects should be considered in the stress-strain model of concrete confined by CFRP.

Stress–strain model for circular concrete columns confined by FRP and conventional lateral steel

2015 ◽  
Vol 84 ◽  
pp. 395-405 ◽  
Author(s):  
Fatemeh Shirmohammadi ◽  
Asad Esmaeily ◽  
Zohreh Kiaeipour
Keyword(s):  
Concrete Columns ◽  
Stress Strain ◽  
Strain Model

scholarly journals Experimental Study on CFRP-Confined Circularized Concrete-Filled Square Steel Tube Short Columns

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Yuchuan Wen ◽  
Zhongjun Hu ◽  
Anningjing Li ◽  
Quanheng Li ◽  
Xuepeng Li ◽  
...  
Keyword(s):  
Concrete Strength ◽  
Concrete Columns ◽  
Steel Tube ◽  
Confined Concrete ◽  
Test Results ◽  
Stress Strain ◽  
Short Columns ◽  
Reinforced Polymer ◽  
Square Steel Tube ◽  
Strain Model

This study investigates the suitability of the circularization technique for strengthening square concrete-filled square steel tube (CFSST) short columns. A total of 16 specimens were tested under axial compression. The main parameters under investigation were concrete strength, the thickness of arc cement mortar layer components (CAM), and the layers of carbon fiber-reinforced polymer (CFRP) sheets. Test results indicated that the failure mode of CFRP-confined circularized CFSST (C-C-CFSST) columns was similar to that of CFRP-confined concrete columns. The CFRP-confined circularized strengthening method can increase confinement efficacy and reduce the stress concentration at the corners of CFSST columns. Three existing CFRP-confined concrete stress-strain models were evaluated using the test results. The predictions of the Lam and Teng stress-strain model agree well with the test data.

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