打ち継ぎを有する鉄筋コンクリート造T形はり部材のせん断耐力に関する実験研究

抄録

It is recognized that the method for fablicating members by composing precast concrete and in-site placed concrete is advantageous on construction of structures. Structurely, such members are required to behave as monolithic members without the noxious slip at the interface between precast concrete and in-site placed concrete, but a standerd specification for structural design on the slip is not yet established, because the stress transfer mechanism at the interface is influenced by many unexplained contribrtions. The experimental study for twenty-one specimens with T-figure section whose parameters were the amount of shear reinforcement bars and the fablicating method was carried out. The results are as followed. The specimens which had the interface within their effective depth slipped at the interface, and the ultimate shear stregth of the specimens slipped at the interface were lower than those of the monolithic specimens. But the slip at the interface was avoided by using dowel reinforcement bars or concrete blocks set on the interface. The strength when slip occurred is estimated by appling the strength calculated by the shear transfer theory to the truss and arch-mechanism.