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Steel and Composite Structures
  Volume 45, Number 1, October10 2022 , pages 23-38

Test and analysis of concrete-filled double steel and double skin tubular columns having outer stainless steel tube
Serkan Tokgoz, Sedat Karaahmetli and Cengiz Dundar

    This paper presents experimental and analytical studies of eccentrically loaded concrete-filled double steel (CFDST) and concrete-filled double skin tube (DCFST) columns having outer stainless steel tube. Eighteen CFDST and DCFST column specimens were manufactured and tested to examine the strength and load-deflection responses. In the study, the main parameters were concrete strength, load eccentricity, cross section and slenderness. The strengths, load-deflection diagrams and failure patterns of the columns were observed. In addition, the tested CFDST and DCFST columns were analyzed to attain the capacity and load versus lateral deflection responses. The obtained theoretical results were compared with the test results. A parametric study was also performed to research the effects of the ratio of eccentricity (e/Ho) slenderness ratio (L/r), Ho/to ratio, Hi/ti ratio and the concrete compressive strength on the behavior of columns. In this work, the obtained results indicated that the ductility and capacity of columns were affected by cross section, concrete strength, steel strength, loading eccentricity and slenderness.
Key Words
    carbon steel tube; concrete-filled steel tube; double skin; double steel; stainless steel tube
Serkan Tokgoz and Sedat Karaahmetli:1Department of Civil Engineering, Adana Alparslan Turkes Science and Technology University, Adana 01250, Turkey

Cengiz Dundar:Department of Civil Engineering, Toros University, Mersin 33340, Turkey

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