Theoretical Analysis on Flexural Behavior of Concrete Members Reinforced by Steel-Basalt FRP Composite Bars

Abstract:

Steel-Basalt FRP Composite Bar (S-BFCB) is a new kind of substitute material for longitudinal reinforcement, with high elastic modulus, stable post-yield stiffness and excellent corrosive resistance. It is made up of steel wrapped by basalt FRP in longitudinal direction. Based on mechanical properties of S-BFCB and the plane cross-section assumption, the moment-curvature relationship and stiffness on flexural members at different stages have been analyzed and verified by experiment. Flexural member reinforced by S-BFCB can make full use of the strength of FRP. By the principle of equivalent bar stiffness, the results show that the curvature and stiffness are almost the same results at pre-yield stage. While after yield, flexural member reinforced by S-BFCB has stable secondary stiffness and high bearing capacity. With the increase of fiber, the ultimate bearing capacity is improved.

• Periodical: Applied Mechanics and Materials (Volumes 578-579)
• Pages: 236-239
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.578-579.236
• Online since: July 2014
• Authors: Tong Liang Xiao*, Hong Xing Qiu
• Keywords: Deflection, Flexural Members by Concrete, Post-Yield Stiffness, Steel-Basalt FRP Composite Bars, Stiffness Degradation, Theoretical Analysis

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