The object of this study is to develop a computer program that can help practical engineers to calculate sectional modulus and plastic moments of full composite girders with deck plates under positive and negative bending moments. The sectional modulus are equivalent moments of inertia for elastic analysis and plastic section modulus for plastic analysis. Results of Hwang's research are used to verify this developed program. AIK, KBC 2005 and 2009 are used to define effective widths of RC slab and to calculate positive plastic moments. For calculating negative plastic moments, this study proposed stress blocks and their equations. The developed program will be added about partial shear interactions and deflections of composite girders and finally proposed as GUI environment.

ABSTRACT
 1. 서 론
 2. 합성보의 단면성능
  2.1 합성보의 등가단면2차모멘트 nIc과 nIs
  2.2 합성보의 정모멘트 구간 소성단면계수 cZ
  2.3 합성보의 부모멘트 구간 소성단면계수 cZ-
 3. 프로그램 검증
  3.1 입력 변수 목록과 분류
  3.2 합성보의 단면성능
 4. 결론
 참고 문헌

• 김요숙(서울시립대학교 건축공학과) | Kim Yo-Suk
• 김도범(서울시립대학교 건축공학과) | Kim Do-Bum
• 남윤선(서울시립대학교 건축공학과) | Nam Yoon-Sun
• 채흥석((주)세진SCM) | Chae Heung-Suk
• 최성모(서울시립대학교 건축공학부) | Choi Sung-Mo