Fatigue De-Bonding Analysis of FRP-Reinforced Concrete Structures Considering Seawater Erosion

IF 3.2 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-04-22 DOI:10.1111/ffe.14661

Jie Liu, Wanyong Wang, Tong Guo, Libin Wang, Zhongxiang Liu

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Abstract

This study experimentally investigates the fatigue behavior of FRP-concrete structures under marine-induced corrosion. Three seawater corrosion environments were simulated, with cyclic load ranges of 3901.8 N, 6503.0 N, and 9104.2 N. Three-stage degradation and three-stage growth models were identified by bond stiffness and residual slip accumulation, respectively. Fatigue strength decreased with seawater exposure, with more severe degradation under prolonged exposure. For example, under original-salinity dry-wet cycle condition with a load range of 3901.8 N, the cycle number of joints cured for 0, 30, 60, and 90 days were 1,763,238, 1,383,336, 1,219,779, and 1,073,708, respectively. The relationship between cycle number (N_f) and load range (ΔF) was fitted by a linear logarithmic curve, and a fatigue strength assessment model was proposed. The predicted values showed a maximum relative error of 7%, confirming the model's effectiveness in predicting fatigue strength under seawater corrosion.

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考虑海水侵蚀的frp钢筋混凝土结构疲劳脱粘分析

试验研究了frp混凝土结构在海洋腐蚀作用下的疲劳性能。模拟了3种海水腐蚀环境，循环荷载范围分别为3901.8 N、6503.0 N和9104.2 N。根据黏结刚度和残余滑移积累分别确定了三阶段退化模型和三阶段生长模型。疲劳强度随海水暴露而降低，暴露时间越长，疲劳强度降低越严重。例如，在荷载范围为3901.8 N的原始-盐度干湿循环工况下，0、30、60和90天的循环节点数分别为1,763,238、1,383,336、1,219,779和1,073,708。采用线性对数曲线拟合循环数（Nf）与载荷范围（ΔF）之间的关系，建立了疲劳强度评价模型。预测值最大相对误差为7%，验证了该模型对海水腐蚀下疲劳强度预测的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.