Fatigue and corrosion interaction: Performance evolution mechanisms in reinforced concrete beams strengthened with CFRP anchorage system

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-10-01 DOI:10.1016/j.conbuildmat.2025.143784

Yujue Zhou , Minsu Wang , Yuezong Lian , Ning Yang , Yongcheng Liu , Wuhua Zeng

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引用次数: 0

Abstract

The strengthening method of using externally bonded (EB) carbon fiber reinforced polymer (CFRP) sheets anchored by CFRP spikes has demonstrated effectiveness in retrofitting the structural capacity of reinforced concrete (RC) structural components. While previous studies have addressed the individual effects of sustained loading or corrosion damage, the coupled effect of multiple degradation factors remains insufficiently explored. In coastal environments, reinforced concrete infrastructure simultaneously experiences chloride-induced corrosion and fatigue loading, creating complex deterioration processes. As a result, the performance analysis of CFRP anchorage system needs to be more definitive. The main objective of this study is to explore the feasibility of a CFRP anchorage system suffering from the coupled effects of corrosion and fatigue. An analysis of the interaction between steel corrosion and the cracking induced by the continuous fatigue effect is presented. Moreover, the performance assessment of an illustrative example showed that the coupled fatigue-corrosion effects significantly reduced the fatigue life of RC beams. Finally, the fractal dimension of cracks, load-carrying capacity, deflection, ductility, stiffness and failure modes of the beams were investigated to assess the effectiveness of CFRP anchor systems in restoring RC structural capacity. The results indicated that the effects of coupled corrosion and fatigue are non-negligible and that the CFRP anchorage system effectively restores the capacity of structures subjected to long-term degradation processes induced by corrosion-fatigue coupling effects.

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疲劳与腐蚀相互作用：CFRP锚固体系加固钢筋混凝土梁的性能演化机制

采用外粘接（EB）碳纤维增强聚合物（CFRP）薄板锚固CFRP钉钉的加固方法在增强钢筋混凝土（RC）结构构件的结构能力方面已被证明是有效的。虽然以前的研究已经解决了持续加载或腐蚀损伤的单个影响，但多种降解因素的耦合影响仍然没有得到充分的探讨。在沿海环境中，钢筋混凝土基础设施同时经历氯化物腐蚀和疲劳荷载，形成复杂的劣化过程。因此，CFRP锚固体系的性能分析需要更加明确。本研究的主要目的是探讨CFRP锚固系统在腐蚀和疲劳耦合作用下的可行性。分析了钢腐蚀与连续疲劳裂纹的相互作用。通过实例分析表明，疲劳-腐蚀耦合效应显著降低了RC梁的疲劳寿命。最后，研究了裂缝分形维数、承载能力、挠度、延性、刚度和破坏模式，以评估CFRP锚固体系在恢复RC结构能力方面的有效性。结果表明，腐蚀和疲劳耦合效应不可忽视，CFRP锚固体系可以有效恢复结构在腐蚀-疲劳耦合作用下的长期退化过程。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.