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Compressive behavior of FRP-confined cruciform steel-reinforced normal- and high-strength concrete columns
Abstract Fiber-reinforced polymer (FRP)-confined steel-reinforced concrete column (FCSRC), which consists of an external FRP tube and a steel-reinforced concrete (SRC) core, have been proposed to avoid the brittleness of SRCs. Capitalizing on the benefits of FRP-confine concrete, it is expected that full strength capacities of high-strength materials (i.e., high-strength concrete and high-strength steel) in FCSRCs can be exploited. Axial compression tests on FCSRCs with different strengths of concrete and steel were conducted in this study. A cruciform steel was adopted in FCSRCs. The parameters investigated in this study included the concrete strength, the steel strength and the FRP tube thickness. The test results demonstrated that the excellent performance of FCSRCs. Compared with normal-strength cross-shaped steel, the high-strength cruciform steel delays the development of hoop strains in the FRP tube for FCSRCs with normal-strength concrete. Additionally, the ultimate axial load of FCSRCs is generally larger than the direct summation of those of the steel section and FRP-confined concrete section (i.e., CFFT), demonstrating that the interaction between the three components (concrete, steel profile and FRP tube) in FCSRCs are in a benificial manner.
Highlights Novel FRP-confined cruciform steel-reinforced concrete columns (FCSRCs) are tested under axial compression. The inner steel cruciform section in FCSRCs experienced much larger deformation than those in SRCs. The Q460 and Q690 steel cruciform section decreases the hoop expansion more effectively than Q345. The interaction between the components in FCSRCs is beneficial to the axial load capacity of the hybrid FCSRCs
Compressive behavior of FRP-confined cruciform steel-reinforced normal- and high-strength concrete columns
Abstract Fiber-reinforced polymer (FRP)-confined steel-reinforced concrete column (FCSRC), which consists of an external FRP tube and a steel-reinforced concrete (SRC) core, have been proposed to avoid the brittleness of SRCs. Capitalizing on the benefits of FRP-confine concrete, it is expected that full strength capacities of high-strength materials (i.e., high-strength concrete and high-strength steel) in FCSRCs can be exploited. Axial compression tests on FCSRCs with different strengths of concrete and steel were conducted in this study. A cruciform steel was adopted in FCSRCs. The parameters investigated in this study included the concrete strength, the steel strength and the FRP tube thickness. The test results demonstrated that the excellent performance of FCSRCs. Compared with normal-strength cross-shaped steel, the high-strength cruciform steel delays the development of hoop strains in the FRP tube for FCSRCs with normal-strength concrete. Additionally, the ultimate axial load of FCSRCs is generally larger than the direct summation of those of the steel section and FRP-confined concrete section (i.e., CFFT), demonstrating that the interaction between the three components (concrete, steel profile and FRP tube) in FCSRCs are in a benificial manner.
Highlights Novel FRP-confined cruciform steel-reinforced concrete columns (FCSRCs) are tested under axial compression. The inner steel cruciform section in FCSRCs experienced much larger deformation than those in SRCs. The Q460 and Q690 steel cruciform section decreases the hoop expansion more effectively than Q345. The interaction between the components in FCSRCs is beneficial to the axial load capacity of the hybrid FCSRCs
Compressive behavior of FRP-confined cruciform steel-reinforced normal- and high-strength concrete columns
Zeng, Jun-Jie (author) / Xu, Zhen (author) / Chen, Guang-Ming (author) / Xiong, Ming-Xiang (author)
2023-06-04
Article (Journal)
Electronic Resource
English
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