| 要旨 |
High strength concrete (HSC) over 100 N/mm2 beams have led to some concerns about their shear capacity because it produces high brittleness, smooth failure surface, and high early age shrinkage. In this study five HSC beams without shear reinforcement were tested. Test results indicated that the surface roughness of the specimen with concrete strength 138 N/mm2 was 10% lower than the specimen with concrete strength 52 N/mm2. Also the normalized shear strength of HSC beams was more dependent on the brittleness of the concrete than the roughness index, or the shrinkage. |