개구부를 갖는 철근콘크리트 전단벽의 전단강도 저감률

초록

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 has the provision about strength reduction factor 'γ'. However, this reduction factor cannot exactly evaluate the reduction effect of openings because this factor 'γ' 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, this study performed statistical study about strength of structural wall which have the opening in wall panel. And this study performed parametric study verifying shear strength reducing effect by opening area. In the results of statistical study, previous reduction factor show very conservative results because this equation did not consider other factors, reinforcement ratio and aspect ratio of openings, which was affect the shear strength of shear walls. Therefore we performed parametric study based on the test data and suggest new equation for shear strength reduction factor 'γ'.

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