Investigation of Frame and Shear Wall Interaction

The combination of flexural frame and shear wall is one of the suitable systems to apply in reinforced concrete buildings. The deflections of flexural frame become limited due to the high stiffness of wall and the interaction of these systems. Tall buildings even higher than fifty stories can be designed by using frame- wall systems. With respect to special behavior of flexural frame or shear wall separately, it can be seen that, although the combination of two systems become stiff with high ductility, but additional forces are generated on the top stories of frame in direction of external forces by shear wall, that is not ideal. With study of the interaction between wall and frame, a spatial level can be found for cutting wall to prevent generation of extra forces that exerted from wall to frame. In this paper, a frame- wall structure has been analyzed under static and response spectrum using ETABS, and the results have been combined with CQC method, and then shear wall has cut step by step to consider the behavior of system before and after truncation of shear wall.