도넛형 이방향 중공슬래브의 사용성 검토를 위한 최대균열간격에 관한 고찰

Abstract

This paper presents an experimental investigation on maximum crack spacing of donut type biaxial hollow slab for the serviceability. According to the existing investigation, flexural capacity showed similar test results with general RC slab. However, in case of flexural crack spacing, it showed spacious distribution than general RC slab. Therefore, flexural crack spacing of this slab considers that it will be judged by average bond stress, and this paper verification on flexural crack spacing of the existing bending specimens were performed through pullout tests. Validity was verified through maximum crack spacing through the calculated average bond stress at pull-out tests and existing bending specimens.