Reinforcement made of fibre-reinforced polymers (FRP) for concrete members is becoming increasingly important in structural engineering. Compared to conventional ribbed steel reinforcement bars, FRP reinforcement can be different in terms of modulus of elasticity, tensile strength and bond behaviour. This article presents and evaluates experimental investigations on the structural behaviour of concrete members under bending and shear loads. Different types of reinforcement (CFRP textile fabrics, CFRP bars, steel bars), cross-sections (slabs, beams) and types of failure (flexure, shear) are investigated. For a direct comparison with conventionally reinforced members, reference tests with steel reinforcement and comparable mechanical reinforcement ratio are carried out. The material properties and the structural behaviour of the studied concrete members are presented. The load-bearing, cracking and deformation behaviour is precisely described and the applicability of existing engineering models is checked. Additionally, the contributions to shear capacity are analysed using the deformation measurement based on digital image correlation.

中文翻译：

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CFRP钢筋混凝土构件在弯曲和剪切载荷下的结构行为

由纤维增强聚合物 (FRP) 制成的用于混凝土构件的钢筋在结构工程中变得越来越重要。与传统的带肋钢筋相比，FRP 钢筋在弹性模量、抗拉强度和粘结性能方面可能有所不同。本文介绍并评估了混凝土构件在弯曲和剪切载荷下的结构行为的实验研究。研究了不同类型的钢筋（CFRP 织物、CFRP 钢筋、钢筋）、横截面（板、梁）和破坏类型（弯曲、剪切）。为了与传统的加强构件进行直接比较，我们进行了钢筋和可比机械配筋率的参考试验。介绍了所研究混凝土构件的材料特性和结构行为。精确描述了承载、开裂和变形行为，并检查了现有工程模型的适用性。此外，使用基于数字图像相关性的变形测量​​来分析对剪切能力的贡献。