This study numerically investigates the shear capacity and structural behavior of precast concrete hollow slabs with air-circulation ribs using ATENA, focusing on the influence of the number of lattice-type shear connectors (6 vs. 12). The analysis shows that specimen LA-C-S12 (12 connectors) develops higher initial stiffness and ultimate load, together with more gradual post-peak degradation and larger energy dissipation than LA-C-S6, indicating a more ductile, flexure-dominated response. Crack and strain distributions reveal shear-dominated brittle failure with concentrated damage around rib openings and the PC–topping interface in LA-C-S6, whereas LA-C-S12 exhibits more uniformly distributed cracking and ductile flexural failure, underscoring the importance of lattice connector quantity and layout for maintaining composite action and adequate shear capacity.
한국어
본 연구는 공기순환용 리브 개구부를 갖는 PC 중공슬래브를 대상으로, 래티스형 전단연결재 개수(6개, 12 개)에 따른 전단내력 및 거동 특성을 비선형 유한요소해석(ATENA)으로 평가하였다. 해석 결과, 전단연결재 12개 를 사용한 LA-C-S12가 6개를 사용한 LA-C-S6보다 초기강성과 최대하중이 증가하고, 최대하중 이후 강도저하 가 완만하여 에너지 소산능과 연성 거동이 우수하게 나타났다. 균열 및 변형 분포는 LA-C-S6에서 개구부와 PC –토핑 계면 주변에 손상이 집중되는 전단 지배형·취성 파괴가, LA-C-S12에서 리브 전역으로 균열이 분산되는 휨 지배형·연성 파괴가 우세함을 보여준다. 이를 통해 공기순환을 위한 리브 단면 결손이 존재하더라도 적절한 래 티스형 전단연결재 수량과 배치에 의해 합성거동을 유지하고 충분한 전단내력과 연성능을 확보할 수 있음을 확인하였다.
Ever since next generation convergence technology became one of the most important industries in the nation, computing professionals have encountered a growing number of challenges. Along with scholars and colleagues in related fields, they have gathered in avariety of forums and meetings over the last few decades to share their knowledge, experiences and the outcome of their research. These exchanges have led to the founding of the International Next-generation Convergence technology (INCA) on December 1, 2015. INCA was registered as an incorporated association under the Ministry of Information and Communications. The main purpose of the organization is to improve our society by achieving the highest capability possible in next generation convergence technology.
간행물
간행물명
차세대융합기술학회논문지 [The Journal of Next-generation Convergence Technology Association]