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Experimental Investigation on Behavior of High-Strength Light weight Concrete-Filled Steel Tube Strut Under Axial Compression

Experimental Investigation on Behavior of High-Strength Light weight Concrete-Filled Steel Tube... This investigation was conducted for experimental and analytical study on the behavior of lightweight concrete-filled steel tube strut (short column) concentrically loaded in compression to failure. Sintagg (expanded clay aggregates) light-weight aggregate was used to prepare high-strength structural lightweight concrete of 40 N/mm2 grade. Sixty-four specimens were tested to failure to investigate the axial compressive behavior of lightweight concrete-filled tube strut (LWCFT). Different strut lengths, sectional sizes, and thickness were used to enumerate the influence of member geometry and constituent material properties on the structural behavior of CFT struts. Ultimate strength results were compared to current specifications governing the design of concrete-filled steel tube struts. This investigation provided a review of the current design rules for concrete-filled sections in Euro code 4 (EC4) and American standards (AISC). Consequently, deadweight of strut member was reduced by 25.30% as compared to normal concrete-filled steel tube strut. The buckling failure pattern for square CFT strut was observed as local buckling takes place, while for circular and rectangular CFT struts plastic buckling takes place. Also, it was observed that the experimental results were adequate to predict the current design specifications. Experimental results suggest that circular tubes offer substantial post-yield strength and stiffness, not available in most square or rectangular cross sections. The calculated confining strengths show that Euro Code-4 provides more realistic results than in case LWCFT strut under axial compression. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png INAE Letters Springer Journals

Experimental Investigation on Behavior of High-Strength Light weight Concrete-Filled Steel Tube Strut Under Axial Compression

INAE Letters , Volume 4 (3) – Sep 12, 2019

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References (24)

Publisher
Springer Journals
Copyright
Copyright © 2019 by Indian National Academy of Engineering
Subject
Engineering; Engineering, general
ISSN
2366-326X
eISSN
2366-3278
DOI
10.1007/s41403-019-00077-7
Publisher site
See Article on Publisher Site

Abstract

This investigation was conducted for experimental and analytical study on the behavior of lightweight concrete-filled steel tube strut (short column) concentrically loaded in compression to failure. Sintagg (expanded clay aggregates) light-weight aggregate was used to prepare high-strength structural lightweight concrete of 40 N/mm2 grade. Sixty-four specimens were tested to failure to investigate the axial compressive behavior of lightweight concrete-filled tube strut (LWCFT). Different strut lengths, sectional sizes, and thickness were used to enumerate the influence of member geometry and constituent material properties on the structural behavior of CFT struts. Ultimate strength results were compared to current specifications governing the design of concrete-filled steel tube struts. This investigation provided a review of the current design rules for concrete-filled sections in Euro code 4 (EC4) and American standards (AISC). Consequently, deadweight of strut member was reduced by 25.30% as compared to normal concrete-filled steel tube strut. The buckling failure pattern for square CFT strut was observed as local buckling takes place, while for circular and rectangular CFT struts plastic buckling takes place. Also, it was observed that the experimental results were adequate to predict the current design specifications. Experimental results suggest that circular tubes offer substantial post-yield strength and stiffness, not available in most square or rectangular cross sections. The calculated confining strengths show that Euro Code-4 provides more realistic results than in case LWCFT strut under axial compression.

Journal

INAE LettersSpringer Journals

Published: Sep 12, 2019

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