Effection of The Existing Reinforcement on The Strength of Reinforced Concrete Slabs Connected by Hinged Jointeds

활절점으로 연결된 철근콘크리트 슬래브 내력에 기존 슬래브 철근이 미치는 영향

In this research, 13 RC slabs connected by hinged joints were tested. the new slab was connected to the existing slab by hinge joint injecting dowel bars between two slabs. Main parameters of the slabs were the spacing of the dowel bars (150mm, 300mm, and 450mm) and the locations of the longitudinal reinforcement of the old slab. The test results indicated that the joint strength of the RC test slabs having various types of dowel bars was about twice that calculated by the ACI 318-02 code. The locations of the longitudinal reinforcement of the old slab slightly increased the strength of the slabs connected by hinged joints.