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http://dx.doi.org/10.7781/kjoss.2012.24.1.081

A Study on the Evaluation of Residual Strength of Double Concrete Filled Tube Column by Unstressed test  

Kim, Sun-Hee (서울시립대학교 건축공학과)
Won, Yong-An (서울시립대학교 건축공학과)
Choi, Sung-Mo (서울시립대학교 건축학부)
Publication Information
Journal of Korean Society of Steel Construction / v.24, no.1, 2012 , pp. 81-89 More about this Journal
Abstract
The concrete-filled tubular square column is superior to steel frame column in terms of fire resistance because of the thermal storage provided by the concrete. Studies have been conducted on CFT column reinforcement with steel bars or with the use of an internal tube to improve its structural load capacity and fire resistance. In fact, reinforced CFT columns have been increasingly used to deal with high axial force. The functional deterioration of columns due to fire damage needs to be measured precisely. In this study, the temperature distribution inside the columns in case of a fire was evaluated and the degree of deterioration in the load capacity of the concrete and reinforcing members associated with temperature distribution was identified in order to evaluate the overall residual strength of the columns.
Keywords
double concrete filled tube column; residual strength; fire resistance; unstressed test;
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