Abstract
Objectives: Experimental study on Double tube Stub column is presented in this paper. Methods/Analysis: The behavior of the concrete infilled double tube stub columns was investigated. Three different strength of concrete namely 30 Mpa, 40 Mpa and 50 Mpa were used to fill the column specimens. To avoid buckling of the test specimen, diameter to thickness ratio was 33.3 and length to Diameter ratio was 3. This value was used for the entire test specimen. Findings: The failure modes of double tube column, load-deflection relation and load- strain relation were presented. Application: From the experimental study it is found that column strength increases due to the presence of additional inner mild steel tube for column having different outer tube materials namely Aluminium (Al), Stainless steel (SS) and Mild steel (MS). From the result it was observed that the presence of inner tube is more beneficial for columns with stainless steel and aluminium as outer tube if the strength of the concrete is less. Keywords: Circular Column, Composite Column, Double Skin, Stress-strain
Highlights
The concept of double skin composite construction was originally devised for use in submerged tube tunnels.Steel tubular members have long been used in offshore and inland construction
The failure modes of double tube column, load-deflection relation and load- strain relation were observed for the test specimens
A test program on concrete filled composite CHS stub columns has been presented in this paper
Summary
The concept of double skin composite construction was originally devised for use in submerged tube tunnels.Steel tubular members have long been used in offshore and inland construction. A possible means of improving stability of tubulars is by void-filling. This technique has been used over the last 4 decades, where the hollow tube is fully filled[1]. Due to their high strength, ductility and good seismic resistance, Concrete in Filled Tubular (CFST) columns are widely used in high rise building construction[2]. Concrete in Filled Double Tubular (CFDST) members can be considered as a new type of CFT construction. CFDST columns consist of two concentric steel tubes. Concrete is filled between the steel tubes and inside the core portion. The cross section of the steel tubes can be Square
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