EXPERIMENTAL STUDY ON RECTANGULAR CONCRETE-FILLED FRP-STEEL COMPOSITE TUBE SHORT COLUMNS UNDER AXIAL COMPRESSION

Abstract

Abstract: Axial compression loading test of nine rectangular concrete-filled FRP-steel composite tube short columns (CFCTs) were conducted to investigate the effects of rounded corners, the FRP layers and the FRP types on axial compressive performance of CFCTs. The results show that rounded corners can improve the stress concentration effects and the stress distribution of the FRP at the corners of the section, and increase strengthening effects exerted by the FRP. The FRP confinement can delay and suppress local buckling of steel tube, compared to concrete-filled steel tube columns, the strength and the ductility of CFCTs were significantly improved. Comparing the different types of FRP, CFRP exhibits much better effects on the enhancement of the strength and the post-yielding stiffness than BFRP.

Key words: fiber reinforced polymer(FRP), steel tubes, rectangular section, confined concrete, axial compression test

CLC Number:

WEI Yang, LI Guo-fen, DUAN Mao-jun. EXPERIMENTAL STUDY ON RECTANGULAR CONCRETE-FILLED FRP-STEEL COMPOSITE TUBE SHORT COLUMNS UNDER AXIAL COMPRESSION[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(12): 47-51.

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