The renewal of existing buildings rather than new construction has increased due to it’s cost effective characteristics. Remodeling is also an environmentally-friendly approach that reduces the amount of waste in construction site. Remodeling can sometimes include partial destruction of the structural members of a building. In addition it is important that the buildings under going remodeling retrofitted to make themselves stable and meet up with the future demands for better structural performance.
There are many types of remodeling, however, Engineers and architectures preferred to make two or more separated spaces to one wide space. Performing this type of remodeling, in the case of wall dominant apartments, partial damage of structural wall is going to be an essential problem. However, there are insufficient studies about partial damage, that is, openings.
Present ACI standard have no clear way to evaluating the opening effect of the structural wall. AIJ have the provision about strength reduction factor 'r'. However, this reduction factor cannot exactly evaluate the reduction effect of openings because this factor 'r' was determined through the elastic analysis.
Therefore, in this study, 2 structural wall specimens were tested and many specimens of previous studies were collected. Using these data, we performed statistical study about strength of structural wall which have the opening in wall panel. And we performed parametric study to verifying shear strength reducing effect by opening area