Interfacial bond-slip degradation relationship between CFRP plate and steel plate under freeze-thaw cycles

2019 ◽  
Vol 214 ◽  
pp. 242-253 ◽  
Author(s):  
Yuyang Pang ◽  
Gang Wu ◽  
Haitao Wang ◽  
Ye Liu
Keyword(s):  
Steel Plate ◽  
Interfacial Bond ◽  
Bond Slip ◽  
Freeze Thaw ◽  
Cfrp Plate

Interfacial bond-slip behaviour between reinforced high-strength concrete and built-in steel plate with studs

2021 ◽  
Vol 226 ◽  
pp. 111317
Author(s):  
Hongying Dong ◽  
Yizhou Zhao ◽  
Wanlin Cao ◽  
Xuepeng Chen ◽  
Jianwei Zhang
Keyword(s):  
High Strength Concrete ◽  
Steel Plate ◽  
High Strength ◽  
Interfacial Bond ◽  
Bond Slip ◽  
Strength Concrete

Bond-slip behavior of CFRP plate-concrete interface

2011 ◽  
Vol 47 (5) ◽  
pp. 529-538 ◽  
Author(s):  
D. Y. Cho ◽  
S. K. Park ◽  
S. N. Hong
Keyword(s):  
Bond Slip ◽  
Cfrp Plate ◽  
Concrete Interface

Theoretical Model for Interfacial Nonlinear Bond Softening Behavior between Embedded Steel and HSHPC

2007 ◽  
Vol 348-349 ◽  
pp. 845-848
Author(s):  
Shan Suo Zheng ◽  
Lei Li ◽  
Guo Zhuan Deng ◽  
Shun Li Che ◽  
Wei Zhao
Keyword(s):  
Theoretical Model ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Nonlinear Process ◽  
Experimental Results ◽  
Interfacial Bond ◽  
Bond Slip ◽  
Softening Behavior ◽  
Bond Softening

The latest experimental study on steel reinforced high strength and high performance concrete (SRHSHPC) specimens shows that there exists interfacial bond softening phenomenon between embedded steel and high strength and high performance concrete (HSHPC), and it makes the shear transfer capacity between shaped steel and HSHPC be progressively reduced. To predict failure load in design, a theoretical model for interfacial bond softening behavior is required. As interfacial bond softening behavior is a nonlinear process involving material properties, it can be analyzed once the relation of interfacial bond stress (τ ) and slippage ( s ) is known. In this paper, the mechanism of interfacial bond-slip is studied, thus a simplified τ − s relation including ascending and descending parts is proposed and employed to analyze the interfacial nonlinear bond-slip process. Based on the interfacial equilibrium between steel and HSHPC as well as the τ − s relation, the basic governing equations in both softened region and elastic region are established and solved for steel strain or stress. At last, the application of the model is verified through comparison with experimental results. The calculating results of the model are found to be in good agreement with experimental results, showing that the model can describe the bond-slip process in real material systems.

Experimental study on the bond behavior of the CFRP-steel interface under the freeze–thaw cycles

2019 ◽  
Vol 54 (1) ◽  
pp. 13-29 ◽  
Author(s):  
Yu-Yang Pang ◽  
Gang Wu ◽  
Hai-Tao Wang ◽  
Zhi-Long Su ◽  
Xiao-Yuan He
Keyword(s):  
Carbon Fiber ◽  
Bond Length ◽  
Ultimate Load ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Bond Slip ◽  
Freeze Thaw ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The bond–slip degradation relationship between carbon fiber-reinforced polymer and steel in a freeze–thaw environment is crucial to evaluate the long-term service performance of steel structures strengthened with carbon fiber-reinforced polymer plates. However, limited studies on the durability and long-term performance of the carbon fiber-reinforced polymer-steel-bonded interface are the major obstacle for the application of carbon fiber-reinforced polymer plates in strengthening steel structures. This paper reports an experimental study to investigate the effects of the carbon fiber-reinforced polymer bond length and the freeze–thaw cycles on the bond behavior of the carbon fiber-reinforced polymer-steel-bonded interface. The three-dimensional digital image correlation technique is applied to obtain displacements and strains on the surface of the single-shear specimen. The experimental results present herein include the failure mode, the ultimate load, the carbon fiber-reinforced polymer strain distribution, the displacement distribution, and the bond–slip relationship. The results show that the ultimate load increases with increasing bond length until a certain bond length value is reached, after which the ultimate load remained approximately constant, and the ultimate loads of carbon fiber-reinforced polymer-steel interface decrease gradually under freeze–thaw cycles. The bond–slip parameters degradation models are proposed, and the bond–slip degradation relationship under the freeze–thaw cycles is established. Finally, the bond–slip degradation relationship is confirmed through comparisons with the experimental results.

scholarly journals Study on the Bond-Slip Performance of CFSSTs Based on Push-Out Tests

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Lai Wang ◽  
Haitao Chen ◽  
Jitao Zhong ◽  
Huirong Chen ◽  
Wei Xuan ◽  
...  
Keyword(s):  
Slenderness Ratio ◽  
Concrete Strength ◽  
Thickness Ratio ◽  
Bond Stress ◽  
Interfacial Bond ◽  
Relative Slip ◽  
Bond Slip ◽  
The Core ◽  
Push Out ◽  
Core Concrete

To study the interfacial bond-slip performance of concrete-filled square steel tubes (CFSSTs), taking the core concrete strength, slenderness ratio, and width-to-thickness ratio as the influencing factors; 9 specimens were designed with 3 factors and 3 levels for the orthogonal test method. In addition, different from the above 9 specimens, one specimen without rust removal was designed for the purpose of comparison. Based on the bond stress distribution and deformation coordination relationships between the specimens during the push-out tests, a theoretical formula for calculating the relative slip of a CFSST was deduced. The results show that with the increase of load, the relative slip at the loading ends was earlier than that at the free ends of the specimens; the interfacial bond failure and relative slip gradually developed from the two ends towards the centre of the specimens; the increase of the bond stress in the middle part was faster than that at the ends of the specimens. The order of these factors from main to secondary is the presence of rust in the inner wall of the square steel tube, the slenderness ratio, the core concrete strength, and the width-to-thickness ratio.

scholarly journals Influence of Freeze-Thaw Damage on the Steel Corrosion and Bond-Slip Behavior in the Reinforced Concrete

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Fangzhi Zhu ◽  
Zhiming Ma ◽  
Tiejun Zhao
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Steel Corrosion ◽  
Concrete Cover ◽  
Bond Slip ◽  
Freeze Thaw ◽  
Ordinary Concrete ◽  
Air Entrained Concrete

This paper mainly studies the behavior of steel corrosion in various reinforced concrete under freeze-thaw environment. The influence of thickness of concrete cover is also discussed. Additionally, the bond-slip behavior of the reinforced concrete after suffering the freeze-thaw damage and steel corrosion has also be presented. The results show that the freeze-thaw damage aggravates the steel corrosion in concrete, and the results become more obvious in the concrete after suffering serious freeze-thaw damage. Compared with the ordinary concrete, both air entrained concrete and waterproofing concrete possess better resistance to steel corrosion under the same freeze-thaw environment. Moreover, increasing the thicknesses of concrete cover is also an effective method of improving the resistance to steel corrosion. The bond-slip behavior of reinforced concrete with corroded steel decreases with the increase of freeze-thaw damage, especially for the concrete that suffered high freeze-thaw cycles. Moreover, there exists a good correlation between the parameters of bond-slip and freeze-thaw cycles. The steel corrosion and bond-slip behavior of reinforced concrete should be considered serious under freeze-thaw cycles environment, which significantly impact the durability and safety of concrete structure.

scholarly journals Mechanical Behavior of Fiber-to-concrete Interface in Textile Reinforced Concrete: Theoretical Model

2019 ◽  
Vol 8 (2) ◽  
pp. 70-78
Author(s):  
Shanshan Cheng
Keyword(s):  
Reinforced Concrete ◽  
Analytical Solution ◽  
Interfacial Shear Stress ◽  
Theoretical Models ◽  
Interfacial Bond ◽  
Textile Reinforced Concrete ◽  
Bond Slip ◽  
Bond Behavior ◽  
Concrete Interface

This paper presents a theoretical solution of a reinforcement-to-concrete interface model under pull-push loading. Expressions for the interfacial shear stress distribution and load-displacement history are derived for different loading stages. The full debonding propagation process is discussed in detail and the analytical solutions are verified by comparing with existing theoretical models. Results of the analytical solution are presented to illustrate how the bond length and local bond-slip law affect the interfacial bond behavior. While the case study in this paper is on textile reinforced concrete, the analytical solution is equally valid to similar mechanical cases such as rebar reinforced concretes.

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