A large percentage of the damages to reinforced concrete structures is caused by corrosion of the reinforcement steel, which often leads to expensive repairs or new construction of existing structures. Due to their high strength and resistance to corrosion, reinforcements made of carbon fibre-reinforced polymers (CFRP) are becoming more and more important in structural engineering. It is expected, that the service life of CFRP reinforced concrete (RC) members can be significantly increased as the strength-reduction due to corrosion is negligible compared to conventional RC members. Therefore, precise knowledge of the long-term behaviour of CFRP RC members is required in order to ensure safe and economic design. This paper presents experimental investigations on the long-term behaviour of CFRP RC members as well as steel-reinforced RC members under monotonic and cyclic long-term loading with varying load levels, different cross-sectional shapes and shear slendernesses. Accompanying experiments on the concrete creep behaviour that were conducted within the investigations are shown. Within the scope of the experiments, the deflections as well as the strains on the top and bottom side of the RC members were measured using displacement sensors and strain gauges. The experimental data is evaluated, especially with regard to the time-dependent deflections. The data is compared to existing mechanical and empirical models, which are usually derived for steel-reinforced RC members. Based on the experimental data, the time-dependent reduction of stiffness and conclusions for the calculation of deflections are shown.

钢筋混凝土结构的很大一部分损坏是由钢筋腐蚀引起的，这通常会导致对现有结构进行昂贵的维修或新建。由于其高强度和耐腐蚀性，由碳纤维增强聚合物 (CFRP) 制成的增强材料在结构工程中变得越来越重要。预计 CFRP 钢筋混凝土 (RC) 构件的使用寿命可以显着增加，因为与传统的 RC 构件相比，由于腐蚀引起的强度降低可以忽略不计。因此，需要准确了解 CFRP RC 构件的长期行为，以确保安全和经济的设计。本文介绍了 CFRP RC 构件以及钢筋 RC 构件在不同载荷水平、不同横截面形状和剪切细长的单调和循环长期载荷下的长期行为的实验研究。显示了在调查中进行的混凝土蠕变行为的伴随实验。在实验范围内，使用位移传感器和应变计测量了 RC 构件顶部和底部的挠度和应变。评估实验数据，尤其是与时间相关的挠度。将数据与现有的力学和经验模型进行比较，这些模型通常是为钢筋钢筋混凝土构件得出的。根据实验数据，