Vol. 15, No. 4, 2020

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Buckling of circular CFDST slender columns with compliant interfaces: exact solution

Simon Schnabl and Bojan Čas

Vol. 15 (2020), No. 4, 499–509

The paper presents a new mathematical model and its exact solution for the buckling analysis of circular CFDST slender columns with compliant interfaces between the steel tubes and sandwiched concrete. The exact critical buckling loads are calculated for the first time. The results are compared to the experimental results and good agreement is obtained. A parametric study is also performed to investigate the effects of different parameters on buckling loads. It is shown that buckling loads can be significantly affected by the finite interface compliance.

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buckling, double-skin, debonding, column, exact
Received: 2 March 2020
Revised: 15 June 2020
Accepted: 23 July 2020
Published: 19 October 2020
Simon Schnabl
Faculty of Civil and Geodetic Engineering
University of Ljubljana
1000 Ljubljana
Faculty of Chemistry and Chemical Technology
University of Ljubljana
1000 Ljubljana
Bojan Čas
Faculty of Civil and Geodetic Engineering
University of Ljubljana
1000 Ljubljana