Recently, the parking in downtown area has caused severe problem due to the dramatic increase of possessing automobile in the country. A parking structure has been on the spotlight to solve the parking problem in downtown area. However, the overall height of parking structure is stipulated less than 8 m. Therefore, in this research, ‘wide composite beam’, which is possible for reducing story height and having long span, is developed and the flexural capacity of the wide composite beam is evaluated. Based on the result of the flexural test, the flexural strength of wide composite beam increased by 20% as the thickness of steel beam increased by 3 mm (6 mm → 9 mm) The shapes of rebar (whether it is triangle or rectangular shape) in the wide composite beam did not affect its flexural strength. The flexural strength of wide composite beam without rebar decreased by 10% compared to that of wide composite beam with rebar. In addition, the neutral axis moved upward as a load increased, but the neutral axis moved downward, when the load exceeded a certain level of load.

Abstract
 1. 서 론
 2. 강-PC형 합성보의 개발
 3. 실험계획
  3.1 실험체 설계
  3.2 실험체 변수 및 실험방법
 4. 실험결과
  4.1 파괴양상 및 하중-변위
  4.2 처짐 분석
 5. 결 론
 감사의 글
 References

• 최윤철(청운대학교 건축공학과 부교수) | Yun-Cheul Choi
• 박금성(한국건설기술연구원 연구위원) | Keum-Sung Park Corresponding author
• 이상섭(한국건설기술연구원 수석연구원) | Sang-Sup Lee
• 최현기(경남대학교 소방방재공학과 조교수) | Hyun-Ki Choi