Development Length of Headed Bar Based on Nonuniform Bond Stress Distribution

2019 ◽  
Vol 116 (2) ◽  
Author(s):  
Hyeon-Jong Hwang ◽  
Hong-Gun Park ◽  
Wei-Jian Yi
Keyword(s):  
Stress Distribution ◽  
Bond Stress ◽  
Development Length

scholarly journals Development Length of GFRP Rebar Based on Non-uniform Bond Stress

2021 ◽  
Author(s):  
Elyas Makhmalbaf ◽  
Ghani Razaqpur
Keyword(s):  
Stress Distribution ◽  
Growth Function ◽  
Test Methods ◽  
Bond Stress ◽  
Test Method ◽  
Logistic Growth ◽  
Development Length ◽  
Design Standards ◽  
Pullout Tests ◽  
Highly Nonlinear

Due to the assumption of uniform bond stress, the development length of FRP bars by design standards can be unnecessarily long and difficult to provide in practice. Hence, the bond stress distribution and required development length of a GFRP rebar is investigated. Four beam-bond specimens, two following RILEM specifications and two based on a procedure by ACI are tested to evaluate the effect of test method on bond strength. Ten pullout tests are also performed using the same bar. The two test methods yield similar results, but the ACI test is easier to perform. The bond stress distribution in the beams is highly nonlinear but in the pullout tests approaches uniformity. The actual development length is found to be 50% to 250% less than that required by the foregoing standards. Consequently, a new equation is proposed based on the logistic growth function to model the non-uniform bond stress distribution and estimate the required development length.

Bond stress distribution in adhesive anchor systems: Interplay of concrete and mortar creep

2022 ◽  
Vol 250 ◽  
pp. 113293
Author(s):  
Ioannis Boumakis ◽  
Krešimir Ninčević ◽  
Marco Marcon ◽  
Jan Vorel ◽  
Roman Wan-Wendner
Keyword(s):  
Stress Distribution ◽  
Bond Stress ◽  
Anchor Systems

Crack Calculation of Beams Reinforced with FRP Bars Based on Linear Bond-Slip Model

2014 ◽  
Vol 919-921 ◽  
pp. 1377-1380
Author(s):  
Xiao Dong Li ◽  
Hao Chen Feng ◽  
Wei Ning Yuan
Keyword(s):  
Stress Distribution ◽  
Crack Width ◽  
Bond Stress ◽  
Distribution Model ◽  
Slip Model ◽  
Bond Slip ◽  
Frp Bars

This paper mainly gets a equation of crack width calculation. To get the result, the lineared bond-slip model between FRP bars and concrete is used, combining with the bond stress distribution model which is found by You Chunan. Finally, the value of this paper is compared with the value of ACI440.1R-06 and JSCE code, which prove the result is right.

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