Structural Design of an Ultra High-rise Building Using Concrete Filled Tubular Column with 780 N/mm2 Class High-strength Steel and Fc150 N/mm2 High-strength Concrete

초록

In recent years, the performance requested for which an ultra-high rise buildings is diversified. Large spans are designed in order to gain wide workspace. Column positions are shifted in middle stories to provide space different from neighboring floors. Moreover, in the bottom layers of the building, it is becoming more important to expand freedom to plan flexibility such as creating publically opened wide atria that gives attractive free space. Earthquake-proof criteria is also changing not only human life protection deign but also a design that allows functional continuity. In order to achieve thee needs, as one of technology, we have developed ultra-high strength concrete filled tubular (CFT) columns of the box section that combine ultra-high strength concrete with specified strength of 150 N/mm2 and ultra-high strength steel material with tensile strength of 780 N/mm2. In this paper, the outline of development of an ultra-high strength CFT column is reported. Also, the structural design of the ultrahigh-rise building using the CFT columns is reported.