Experimental Study of Square and Rectangular CFDST Sections with Stainless Steel Outer Tubes under Axial Compression
Publication: Journal of Structural Engineering
Volume 145, Issue 11
Abstract
A comprehensive experimental investigation into the axial compressive response of concrete-filled double skin tubular (CFDST) sections with stainless steel square and rectangular outer tubes is presented. A total of 28 tests was carried out. The experimental setup and procedures are described, and the test observations are fully reported. The test results are employed to assess the applicability of the current European and North American design provisions for composite carbon steel members to the design of the studied CFDST cross sections. Modifications to the current design codes are also considered—a higher buckling coefficient of 10.67 to consider the beneficial restraining effect of the concrete on the local buckling of the stainless steel outer tubes and a reduction factor to account for the effective compressive strength of high-strength concrete. Overall, the comparisons revealed that the existing design rules may generally be safely applied to the prediction of the compressive resistance of CFDST cross sections with stainless steel outer tubes, although the modified design rules offered greater accuracy and consistency.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jun 20, 2018
Accepted: Mar 7, 2019
Published online: Sep 12, 2019
Published in print: Nov 1, 2019
Discussion open until: Feb 12, 2020
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