薄型シャーコッターによる合成接合面の設計に関する研究 : 大型ハーフPC合成床板工法に関する研究

抄録

A new slab system whereby a concrete composite slab is constructed by placing concrete on a large scale precast concrete panel with the shallow and concave shear keys cast on site by multi-layer casting allows the reduction of the construction period, saves manpower, and reduces the amount of temporary materials used. To investigate the transfer mechanism of horizontal shearing force at the interface between precast concrete and in-situ placed concrete, and to establish the standard specifications for the structural design, the following tests were carried out. 1) Shearing test are carried out to study the effect of the shear keys in transferring the shearing force at the interface. 2) Flexural and shearing strength test for the composite slab are carried out to study the strength, deformation capacity and failure conditions. The results are studied by comparing them with those of a monolithic slab. 3) Long-term loading test for the composite slab are carried out to study the creep behavior and the long-term reliability of the shear keys. The test results prove that the shear keys to be made on the surface of the precast concrete panel according to the standard specification allow the construction of a composite slab with the quality nearly equal to that of a monolithic slab.