Effect of flanged wall on rigidity and ultimate strength of reinforced concrete shear wall

The major aseismatic components of a nuclear reactor building are solid walls, such as the box wall which consists of web walls and flange walls. Recently experimental studies have been carried out on the effects that such parameters as the size of a wall, reinforcement, openings and so on exert to walls. In this study, the results of both experiment and elastoplastic FEM analysis on the effect that a flanged wall exerted to the rigidity and ultimate strength in its elastoplastic region were presented, and the influence of the width of flange walls was discussed. A test specimen is composed of a web wall and flange walls forming H shape. The details and the properties of the test specimens are given. The testing setup is shown, and the loading procedure is explained. The model for FEM analysis and three parameters, that is, the width of flange walls, the height of a solid wall and the thickness of a top slab, are shown. The results are reported. The rigidity of solid walls was evaluated experimentally and analytically in connection with the width and the elastic performance of flange walls, and the flexural stiffness related to the effect of flange wall width was introduced. (K.I.)