UHPC(Ultra High Performance Concrete) is used widely with its remarkable performance, such as strength, ductility and durability. Since the fibers in the UHPC can control the tensile crack, the punching shear capacity of UHPC is higher than that of the conventional concrete. In this paper, seven slabs with different thickness and fiber volume ratio were tested. The ultimate punching shear strength was increased with the fiber volume ratio up to 1%. The shear capacity of specimens with the fiber content 1% and 1.5% do not have big differences. The thicker slab has higher punching shear strength and lower deformation capacity. The critical sections of punching shear failure were similar regardless of the fiber volume ratio, but it were larger in thicker slab.

Abstract
 1. 서론
 2. 실험 계획
  2.1 실험체 제작
  2.2 재료 실험
  2.3 실험체 제작 및 실험 계획
  2.4 계측 계획
 3. 실험 진행 및 결과
  3.1 실험 일반 및 파괴 거동
  3.2 최대 뚫림 전단 강도와 중앙부 처짐
  3.3 하중 증가에 따른 변형
 4. 실험 분석
  4.1 파괴 단면
  4.2 UHPC 뚫림 전단 강도 예측식
 5. 결론
 감사의 글
 References

• 홍성걸(서울대학교 공과대학 건축학과, 공학박사) | Hong, Sung-gul 교신저자
• 박지현(서울대학교 공과대학 건축학과, 석사과정) | Park, Ji-Hyun