钢/纤维带肋混合配筋混凝土梁抗弯性能试验研究

Experimental Study on the Flexural Properties of Concrete Beams Reinforced with Hybrid Steel/Fiber-Belt-Bars.

作者信息

Gu Wenhu, Liu Hengrui, Dong Yun

机构信息

Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, Huai'an 223001, China.

College of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No. 1, Nanjing 210098, China.

出版信息

Materials (Basel). 2022 May 13;15(10):3505. doi: 10.3390/ma15103505.

DOI:10.3390/ma15103505

PMID:35629532

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9145177/

Abstract

Reinforcement corrosion poses a great threat to the safety of reinforced concrete structures, and the fiber-reinforced polymer is the ideal material to partially replace steel bars due to the high strength, light weight and good durability. However, the selection of appropriate fiber materials and a reasonable ratio of fiber bar to steel bar is not clear. Here, we measured the mechanical properties of fiber bars containing aramid fiber and carbon fiber. The deflection deformation, crack distribution and maximum crack width of the concrete upon various loads were experimentally and theoretically investigated. The predictions of the maximum crack width and deflection of reinforced concrete beams under various loads were proposed in ACI standard, which may provide guidance for further applications of fiber-belt-bar-containing concrete beams.

摘要

钢筋锈蚀对钢筋混凝土结构的安全性构成了巨大威胁，而纤维增强聚合物因其高强度、轻质和良好的耐久性，是部分替代钢筋的理想材料。然而，合适的纤维材料选择以及纤维筋与钢筋的合理比例尚不明晰。在此，我们测量了含芳纶纤维和碳纤维的纤维筋的力学性能。通过实验和理论研究了不同荷载作用下混凝土的挠曲变形、裂缝分布及最大裂缝宽度。美国混凝土学会（ACI）标准中给出了不同荷载作用下钢筋混凝土梁最大裂缝宽度和挠度的预测方法，这可为含纤维带筋混凝土梁的进一步应用提供指导。