U-flanged truss beam is composed of u-shaped upper steel flange, lower steel plate of 8mm or more thickness, and connecting lattice bars. Upper flange and lower plate are connected by the diagonal lattice bars welded on the upper and lower sides. In this study, the details of delayed buckling of lattice members were developed through reinforcement of the end section, in order to improve structural capacity of U-flanged Truss Steel Beam. To verify the effects of these details, the simple beam experiment was conducted. The maximum capacity of all the specimens were determined by the buckling of the lattice. The vertical reinforced details of the ends with steel plates, rather than the details reinforced with steel bars, are confirmed to be a valid method for enhancing the structural capacity of the U-flanged Truss beam. In addition, U-flanged Truss Steel Beam with reinforced endings with steel plates can exhibit sufficient capacity of the lattice buckling by the formulae according to Korean Building Code (KBC, 2016) and Eurocode 3.

Abstract
1. 서론
2. 실험 계획
    2.1 실험체 계획
    2.2 가력 방법 및 측정 방법
3. 실험 결과 및 분석
    3.1 금속 재료 인장 시험
    3.2 파괴 양상
    3.3 하중-변위 관계 곡선 분석
    3.4 기준식과의 내력 비교
4. 결론
References

• 오명호(국립목포대학교 건축공학과) | Oh Myoung Ho (Dept. of Architectural Engineering, Mokpo National Univ.)
• 김영호(국립목포대학교 건축공학과) | Kim Young Ho (Dept. of Architectural Engineering, Mokpo National Univ.) 교신저자