Abstract

현재 토목 및 건축구조에서 고성능 고강도 강에 대한 수요가 증가함에 따라 고성능 재료개발의 필요성이 증대되고 있다. 특히 초고층 건물과 장경간을 가지는 구조에서는 고강도, 고인성, 우수한 용접성 등이 요구된다. 이에 따라 현재 국내에서는 600MPa 급 강재의 개발이 진행 중에 있다. 그러나 고강도 강재는 일반 강재와는 전혀 다른 기계적 특성을 갖고 있다. 그러므로 고강도 강재를 구조물에 적용하기 위해서는 비탄성영역에서의 거동이 일반 강재와 동등한가를 확인해야 한다. 본 연구에서는 600MPa급 원형 강관의 기둥 및 보부재 실험을 통해 구조적 거동을 파악하였다. 각각 3개의 기둥 및 보 실험이 수행되었으며, 현행설계규준과의 적합성을 평가하였다. Recent advances of technology in materials science have made it easy to respond to user's needs on high performance steel in civil and building structures. The high-performance and high-strength steel are required for large scale structure and high-rise building to have high-strength, high fracture toughness and better weldability etc. Therefore development of 600MPa class steel for mega structure is necessary. high strength steels, however, may have mechanical properties that are significantly different from those of the conventional steels. The application of high-strength steels to building structures should be reviewed as to whether inelastic behavior equivalent to that of conventional steels can be attained or not. This study researched the structural behavior of high strength circular tubes compression and under flexure. Three column tests and three flexural tests were carried out. The suitability of existing design formulae(KBC 2009) and the structural behavior were investigated through these columns and beams with various types.

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