CREEP ESTIMATION METHOD OF REINFORCED CONCRETE COLUMNS USING HIGH STRENGTH CONCRETE IN CONSIDERATION OF CONSTRUCTION PROCESS

Abstract

Measure on long-term compressive properties of reinforced concrete columns using high strength concrete were carried out. Two actual columns in a 45-story building has been measured for about two years after casting. Additionally, one-third-scale columns under step-by-step incremental loading, simulating actual stress condition in consideration of construction process were also measured for about three years. The compressive creep model for high strength concrete, which is modified using CEB-FIP model code 1990, was proposed for the prediction of the compressive performance of these columns.