Pauletta Margherita, Rovere Nicola, Randl Norbert, Russo Gaetano
Polytechnic Department of Engineering and Architecture, University of Udine, Via delle Scienze, 206-33100 Udine, Italy.
School of Civil Engineering and Architecture, Carinthia University of Applied Sciences, Villacher Str. 1, 9800 Spittal, Austria.
Materials (Basel). 2020 Feb 21;13(4):979. doi: 10.3390/ma13040979.
Maintenance of reinforced concrete structures is a prevailing topic, especially with regard to lifeline structures and bridges, many of which are now designed with a service life beyond 100 years. Reinforcement made of ordinary (carbon) steel may corrode in aggressive environments. Stainless steel, being much more resistant to corrosion, is a valid solution to facilitate the protection of the works, increasing the service life and reducing the need for repair and maintenance. Despite the potential for stainless steel to reduce maintenance costs, studies investigating the influence of stainless steel on the behavior of reinforced concrete structures are limited. This study investigated the bond behavior of stainless steel rebars by means of experimental tests on reinforced concrete specimens with different concrete cover thicknesses, concrete strengths, and bar diameters. In each case, identical specimens with carbon steel reinforcement were tested for comparison. The failure modes of the specimens were examined, and a bond stress-slip relationship for stainless steel bars was established. This research shows that the bond behavior of stainless steel rebars is comparable to that of carbon steel bars.
钢筋混凝土结构的维护是一个普遍关注的话题，特别是对于生命线结构和桥梁而言，其中许多结构目前的设计使用寿命超过100年。普通（碳钢）钢筋在侵蚀性环境中可能会腐蚀。不锈钢具有更强的耐腐蚀性，是促进工程保护、延长使用寿命并减少维修和维护需求的有效解决方案。尽管不锈钢有降低维护成本的潜力，但研究不锈钢对钢筋混凝土结构性能影响的研究却很有限。本研究通过对具有不同混凝土保护层厚度、混凝土强度和钢筋直径的钢筋混凝土试件进行试验测试，研究了不锈钢钢筋的粘结性能。在每种情况下，都对相同的碳钢钢筋试件进行了测试以作比较。检查了试件的破坏模式，并建立了不锈钢钢筋的粘结应力-滑移关系。本研究表明，不锈钢钢筋的粘结性能与碳钢钢筋相当。
