Prediction of bonding strength between helically wound FRP bars and concrete based on GEP

doi:10.19936/j.cnki.2096-8000.20250928.015

Abstract

Abstract: Bonding strength is an important index to evaluate the bond performance between fiber-reinforced polymer (FRP) and concrete. Due to too many influencing factors, the prediction accuracy of the bonding strength of the relevant specifications and the mathematical model established by the researchers is low. In order to solve the above problems, a database containing 81 groups of bonding strength between helically wound FRP bar and concrete was established by collecting relevant references, and a mathematical prediction model was established based on gene expression programming (GEP) algorithm. The GEP model was compared with the mathematical formula based on the experimental data. The evaluation indexes included determination coefficient (R²), mean absolute error (MAE) and root mean square error (RMSE). The results show that the R², MAE and RMSE of the bonding strength prediction model based on GEP are 0.867, 1.510 and 1.853, respectively. Compared with the existing prediction models with the highest accuracy, the GEP-based prediction model R² is increased by 39.39%, MAE is decreased by 31.79%, and RMSE is decreased by 27.48%.

Key words: helically wound FRP bars, GEP, bonding strength, prediction model, concrete

CLC Number:

TB332

HU Cong, YANG Lang. Prediction of bonding strength between helically wound FRP bars and concrete based on GEP[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(9): 117-124.

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