탑다운공법에서 고강도 콘크리트충전강관기둥의 장기거동 계측

The top-down construction method enables the superstructure and substructure of a high rise building to be built simultaneously, thus saving valuable construction time. It is important to the time dependent effects of creep and shrinkage of concrete in concrete-filled steel tube column (CFT column) in high-rise system composed of CFT frame tube and reinforced concrete (RC) core-wall. Creep tests of CFT columns have been performed to clarify the behavior under the long-term load. The paper presents the results of measurements designed to ascertain the time-dependent response of concrete in square CFTs, as are deployed extensively in high-rise building construction.