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Open AccessArticle

Compressive Behavior of Sustainable Steel-FRP Composite Bars with Different Slenderness Ratios

by Yu Tang, Zeyang Sun * and Gang Wu *
Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China
*
Authors to whom correspondence should be addressed.
Sustainability 2019, 11(4), 1118; https://doi.org/10.3390/su11041118
Received: 18 December 2018 / Revised: 9 February 2019 / Accepted: 18 February 2019 / Published: 20 February 2019
This paper presents experimental studies on the compressive behavior of a sustainable steel-fiber reinforced composite bar (SFCB) under uniaxial compressive loading. The SFCB, combined with steel and fiber reinforced polymer (FRP), is expected to significantly enhance structural safety and sustainability. A new test method with LVDT and extensometer sensors was developed and verified through experiments to test the tensile and compressive behavior of the SFCB. Fifty-four specimens including SFCB and inner steel bar (ISB) with different slenderness ratios were tested. The test results indicated that the initial compressive elastic modulus of the SFCB was essentially the same as its initial tensile elastic modulus. The compressive yield load of the SFCB was essentially irrelevant to the slenderness ratio, and the ultimate compressive stress of the SFCBs varied inversely with the slenderness ratios. The squash load of the SFCB tended to be conservative for predicting the compressive yield load of the SFCB, while the equivalent critical global buckling load of the SFCB was much higher than its corresponding compressive yield load and ultimate load due to the inelastic buckling mechanism of the SFCB within the range of the equivalent slenderness ratios studied in this paper. View Full-Text
Keywords: reinforcement; SFCB; compressive properties; slenderness ratio; stress-strain relations reinforcement; SFCB; compressive properties; slenderness ratio; stress-strain relations
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Tang, Y.; Sun, Z.; Wu, G. Compressive Behavior of Sustainable Steel-FRP Composite Bars with Different Slenderness Ratios. Sustainability 2019, 11, 1118.

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