Compressive behaviour of FRP-steel wire mesh composite tubes filled with seawater and sea sand concrete. (3rd January 2022)

• Record Type: Journal Article
• Authors: Wei, Yang; Xu, Pengfei; Zhang, Yirui; Wang, Gaofei; Zheng, Kaiqi
• Is Part Of: Construction & building materials. Volume 314:Part B(2022)
• Publication Date: 2022-01-03
• Subjects: Seawater and sea sand concrete -- Confinement -- Fibre-reinforced polymer–steel wire mesh composite tube -- Axial behaviour -- Stress–strain model; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.125608
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: A seawater and sea sand concrete filled FRP-steel wire mesh composite tube (SFWCT) was proposed. The combination of FRP tube and steel mesh makes it possible to use seawater and sea sand concrete. The mix of the steel wire mesh significantly improves the ductility after failure. Increasing the number of steel mesh layer can reduce the damage degree of the column. Abstract: A new structural type of seawater and sea sand concrete (SWSSC)-filled fibre-reinforced polymer (FRP) and steel wire mesh composite tube (SFWCT) was proposed. The steel wire mesh, working as an intermediate layer, was embedded in two layers of FRP. Due to the high corrosion resistance of FRP, the steel wire mesh could maintain a long-term stable working state while the core concrete was effectively confined. Three series of specimens were tested under compressive loading. The test parameters mainly included the number of layers of steel wire mesh, the FRP type and the FRP thickness. The results show that the time to failure was significantly reduced with the new design, as the steel wire mesh could effectively decrease the degree of damage in the specimens and prevent the specimens from immediately losing their bearing capability due to the sudden fracture of the FRP. The accuracies of relevant models were evaluated with the test data, and the model with the best performance was suggested. Moreover, the full stress–strain curves of SFWCTs under compression were simulated, and the calculated results were satisfactory.