In this study, we propose a new truss deckplate system, which does not require temporary floor supports during construction, with ultra-high-performance concrete (UHPC) infilled top bars. The increased stiffness and strength of the proposed system were well retained as compared to those of the existing truss deckplate systems, thereby resulting in the reduction of maximum deflection at the span center. Four-point bending tests were performed on five specimens with a net span of 4.6 m to evaluate the structural performance of proposed system in the construction stage. In addition, the load-deflection curve was plotted for each specimen, and the effects of test parameters were analyzed. Further, a rigorous nonlinear three-dimensional finite element analysis was performed, and its results were compared with the test results. From the results, it was observed that the test specimens of the proposed system exhibited superior performance as compared to those of the existing one and also satisfied the serviceability requirement during construction provided by the Korea Building Code 2016.

Abstract
1. 서 론
    1.1 연구배경
2. 실험 계획 및 방법
    2.1 실험체 계획 및 재료별 항복강도
    2.2 실험체 가력 및 계측
3. 실험 결과 및 분석
    3.1 상현재 종류에 따른 비교
    3.2 UHPC 충전량에 따른 비교
    3.3 시공단계 하중에서의 처짐 비교
4. 유한요소해석 모델
    4.1 요소망 형상 및 경계조건
    4.2 실험결과와의 비교
5. 결 론
References

• 손홍준(경희대학교 건축공학과) | Hong-Jun Son (Department of Architectural Engineering, Kyung Hee Univ.)
• 김영호(목포대학교 건축공학과) | Young-Ho Kim (Department of Architectural Engineering, Mokpo National University)
• 김대진(경희대학교 건축공학과) | Dae-Jin Kim (Department of Architectural Engineering, Kyung Hee Univ.) Corresponding author