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Experimental Investigation of Double-skinned Composite Stub Column


Maria Jacob , Valliammai Engineering College; R. Gowri, Valliammai Engineering College


DSTC, Geopolymer Concrete, FRP Tube, Hollowness Ratio


a steel-concrete composite column is a compression member, comprising either a concrete encased hot-rolled steel section or a concrete filled tubular section of hot-rolled steel and is generally used as a load-bearing member in a composite framed structure. In a composite column both the steel and concrete would resist the external loading by interacting together by bond and friction. Supplementary reinforcement in the concrete encasement prevents excessive spalling of concrete both under normal load and fire conditions. The simplest form of concrete-filled steel tubes consist of a single hollow steel tube filled with concrete with or without internal steel reinforcing bars, while a double skin tubular column consist of two generally concentric tubes with the space between filled with concrete. DSTC have higher bending stiffness, lighter weight, higher fire resistance capacity, high strength-to-weight ratios and good corrosion resistance. Hence In the present study double skin tubular columns (DSTC) are considered in which the strength criteria and failure pattern were studied. In the present study the DSTC specimen is made of outer FRP tube and inner steel tube for which the hollowness ratio is varied from 0.4 to 0.8 and slenderness ratio from 2 - 3.3 are being considered. Conventional concrete and Geopolymer concrete are used as infilling material for which the test results are being compared.

Other Details

Paper ID: IJSRDV4I120651
Published in: Volume : 4, Issue : 12
Publication Date: 01/03/2017
Page(s): 877-880

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