高強度材料を用いたコンクリート充填鋼管部材の曲げ耐力と変形性能の評価

摘要

There is alarge demand for reducing cross section of concrete-filled steel tube (CFT) members because they are often applied to places with space limitation. Although the use of high strength materials is effective in minimizing the cross section, the existing design method is not applicable to high strength materials. In this study, loading tests of CFT members using high strength materials were carried out to obtain their bending capacity and ductility. As a result, it was found out that a new design method is applicable to those members. Considering the obtained behavior, damage level limits of CFT using high strength materials were discussed.%円形断面コンクリート充填鋼管部材(以下,CFT部材)は，充填コンクリートによる鋼管の座屈防止効果および鋼管による充填コンクリートの拘束効果により，大きな耐カおよび優れた変形性能を有している。さらに，鋼管がコンクリート打設時の型枠となることで近接施工が可能であるなど，施工性にも優れている。