Development Length of Compression Reinforcing Bar Based on Nonuniform Bond Stress Distribution

2018 ◽  
Vol 115 (6) ◽  
Author(s):  
Hyeon-Jong Hwang ◽  
Hong-Gun Park ◽  
Wei-Jian Yi
Keyword(s):  
Stress Distribution ◽  
Bond Stress ◽  
Development Length ◽  
Reinforcing Bar

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.

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

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

Stochastic damage model for bond stress-slip relationship of reinforcing bar embedded in concrete

2019 ◽  
Vol 194 ◽  
pp. 11-25 ◽  
Author(s):  
Le Huang ◽  
Hailong Ye ◽  
Shaohua Chu ◽  
Lihua Xu ◽  
Yin Chi
Keyword(s):  
Damage Model ◽  
Bond Stress ◽  
Reinforcing Bar ◽  
Relationship Of ◽  
Stochastic Damage

Bond stress-slip behaviour of steel reinforcing bar embedded in hybrid fiber-reinforced concrete

2013 ◽  
Vol 17 (7) ◽  
pp. 1700-1707 ◽  
Author(s):  
Rashid Hameed ◽  
Anaclet Turatsinze ◽  
Frédéric Duprat ◽  
Alain Sellier
Keyword(s):  
Reinforced Concrete ◽  
Bond Stress ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Reinforcing Bar

scholarly journals Experimental Study on Bond Behavior between Plain Reinforcing Bars and Concrete

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Guohua Xing ◽  
Cheng Zhou ◽  
Tao Wu ◽  
Boquan Liu
Keyword(s):  
Aluminium Alloy ◽  
Structural Characteristics ◽  
Bond Stress ◽  
Reinforcing Bars ◽  
Bond Slip ◽  
Bond Behavior ◽  
Reinforcing Bar ◽  
Test Parameters ◽  
Steel Bars ◽  
Plain Bars

To evaluate the bond behavior between the reinforcing bar and surrounding concrete, a total of six-group pullout specimens with plain steel bars and two-group specimens with deformed steel bars, serving as a reference, are experimentally investigated and presented in this study. The main test parameters of this investigation include embedment length, surface type of reinforcing bars, and bar diameter. In particular, the bond mechanism of plain steel reinforcing bars against the surrounding concrete was analyzed by comparing with six-group pullout specimens with aluminium alloy bars. The results indicated that the bond stress experienced by plain bars is quite lower than that of the deformed bars given equal structural characteristics and details. Averagely, plain bars appeared to develop only 18.3% of the bond stress of deformed bars. Differing from the bond strength of plain steel bars, which is based primarily on chemical adhesion and friction force, the bond stress of aluminium alloy bars is mainly experienced by chemical adhesion and about 0.21~0.56 MPa, which is just one-tenth of that of plain steel bars. Based on the test results, a bond-slip model at the interface between concrete and plain bars is put forward.

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