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Bond-Slip Behavior between Plastic Bellow and Concrete
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Despite the widespread use of plastic bellows in prestressed channels, their poor bonding with concrete and mortar results in “layering,” which limits their application in practical engineering. In this study, the bonding property between plastic bellows and concrete or grout material was investigated using a single-end compression test on plastic bellow concrete. The slip failure mode, ultimate load, and slip of plastic bellows were obtained. Furthermore, the analysis of the bond-slip properties of plastic bellows indicated that the bond strength decreased with increasing bond length. Moreover, the increase in the loading force was greater than the increase in the contact area. Based on the test data, a bond-slip constitutive relationship model was established, which accurately reflects the bond-slip process. The expressions of bond and slip were derived along with different bond positions of plastic bellow concrete specimens. Finally, a three-dimensional finite element model of a plastic bellow concrete specimen was established. The numerical simulation curve was compared with the experimental and fitting curves. The results indicated that the bond strength of the plastic bellow concrete specimen decreased with increasing bond length. The influence of bond strength on the contact area was comprehensively analyzed. This study effectively combines experimental research, theoretical analysis, and numerical simulation to analyze the bond performance between plastic bellows and concrete or grout material.
Title: Bond-Slip Behavior between Plastic Bellow and Concrete
Description:
Despite the widespread use of plastic bellows in prestressed channels, their poor bonding with concrete and mortar results in “layering,” which limits their application in practical engineering.
In this study, the bonding property between plastic bellows and concrete or grout material was investigated using a single-end compression test on plastic bellow concrete.
The slip failure mode, ultimate load, and slip of plastic bellows were obtained.
Furthermore, the analysis of the bond-slip properties of plastic bellows indicated that the bond strength decreased with increasing bond length.
Moreover, the increase in the loading force was greater than the increase in the contact area.
Based on the test data, a bond-slip constitutive relationship model was established, which accurately reflects the bond-slip process.
The expressions of bond and slip were derived along with different bond positions of plastic bellow concrete specimens.
Finally, a three-dimensional finite element model of a plastic bellow concrete specimen was established.
The numerical simulation curve was compared with the experimental and fitting curves.
The results indicated that the bond strength of the plastic bellow concrete specimen decreased with increasing bond length.
The influence of bond strength on the contact area was comprehensively analyzed.
This study effectively combines experimental research, theoretical analysis, and numerical simulation to analyze the bond performance between plastic bellows and concrete or grout material.
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