@Article{icces.2025.011903,
AUTHOR = {Quanzhou Yao, Wenxin Chang, Lin Ye},
TITLE = {Rib Design of Fiber-Reinforced Polymer Reinforcement Bars and Study on Stick-Slip Friction at the Concrete Interface},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {34},
YEAR = {2025},
NUMBER = {1},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v34n1/65770},
ISSN = {1933-2815},
ABSTRACT = {With the rapid advancement of global infrastructure development and the deepening of sustainable development 
principles, fiber-reinforced polymer (FRP) reinforcement bars have emerged as an innovative alternative to 
traditional steel reinforcement due to their lightweight, high-strength, corrosion resistance, and fatigue-resistant 
properties. However, the practical engineering application of FRP bars in concrete structures still faces critical 
challenges in optimizing the interfacial bond performance between the reinforcement and concrete. This study 
addresses the scientific bottleneck in rib height design for FRP bars by systematically investigating the evolution 
mechanism of fiber strain during the rib-forming process through theoretical analysis and finite element numerical 
simulations. <br/>
In this work, a fiber strain analysis model was first established based on fiber damage mechanism analysis, and an 
approximate analytical solution for the critical rib height was derived. A numerical model incorporating finite 
bending stiffness was further developed via finite element methods to validate the theoretical model, revealing the 
nonlinear transition characteristics of fiber strain with increasing rib depth. The results indicate that the fiber strain 
distribution is significantly influenced by the coupled effects of rib depth and fiber diameter, exhibiting a transition 
mechanism from bending-dominated to tensile-dominated regimes. By quantifying the relationship between strain 
distribution and the bending-to-tensile energy ratio, a dimensionless parameter β was introduced, and a three-dimensional
β(h*, d*) map was constructed, providing a quantitative basis for the synergistic optimization of rib 
depth and fiber diameter in engineering design. <br/>
Furthermore, to quantify the impact of rib height on the bond strength of reinforcement bars in concrete, an 
analytical relationship between rib height and pull-out force was derived by integrating contact mechanics and the 
classical Prandtl-Tomlinson model, which was subsequently validated through finite element modeling. This 
modified Prandtl-Tomlinson model effectively explains, for the first time, the unique friction-weakening stick-slip 
phenomenon during bar pull-out from concrete, offering further theoretical support for the quantitative design of 
rib height. This study not only provides scientific guidance for FRP rib design but also lays a foundation for the 
paradigm shift in composite interface design from empirical-driven to model-driven approaches, holding 
significant theoretical and engineering application value. },
DOI = {10.32604/icces.2025.011903}
}