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• W4310018783 endingPage "116527" @default.
• W4310018783 startingPage "116527" @default.
• W4310018783 abstract "To solve the problems of traditional concrete T-beam structures, such as heavy weight and easy cracking of webs, this study proposes a new (GFRP) grid web-concrete composite beam structure based on the mechanical characteristics of fiber-reinforced polymer (FRP) materials. The GFRP grid fibers are arranged in 45° direction to avoid the weak shear resistance between FRP layers and to efficiently transfer the shear force. Five beam tests were carried out to respectively study the bending, shear and local compression properties of the new type of composite beam. Results show that the stress state of GFRP grid is consistent with the proposed theoretical hypothesis, and the connection is kept intact. The flexural carrying capacity, stiffness, and ductility of the composite beam can reach the level of the concrete T beam with the same section, and the shear resistance and local compression also have sufficient reserves of carrying capacity. The combined effect of composite beam with 50 m span was analyzed by finite element method. Numerical analysis indicates that the stress and deflection of each part of composite beam can meet the design requirements under overload condition at the most unfavorable loading position in combined condition. The arrangement of vertical ribs has little effect on the stress and deflection distribution of the composite beam flange plate. When compared with concrete T-beam, the mechanical properties of new composite beam are similar and the self-weight is reduced by 19.34%. Meanwhile, the new composite beam has preliminary engineering feasibility, since the problems of easy cracking of webs and interlaminar shear failure of traditional concrete T-beam structures can be avoided." @default.
• W4310018783 created "2022-11-30" @default.
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• W4310018783 date "2023-02-01" @default.
• W4310018783 modified "2023-10-13" @default.
• W4310018783 title "Feasibility study of new GFRP grid web - Concrete composite beam" @default.
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• W4310018783 doi "https://doi.org/10.1016/j.compstruct.2022.116527" @default.
• W4310018783 hasPublicationYear "2023" @default.
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