earticle

영어

The tube structure is one of the most efficient lateral resisting structural system. But as a result of the flexural and shear flexibilities of the frame members, the behavior of the tube structure is complicated by the shear lag phenomenon which has the effects of increasing the axial stress in the corner columns, decreasing those in the inner columns and reducing the lateral
stiffness of the structure. The outrigger system is a solution to decreasing the shear lag phenomenon and displacement.
The purpose of this study is to evaluate the seismic performance of tube structure system with outrigger tube structure. This study adopts response spectrum analysis and pushover analysis. To analyze the effect between outrigger tube structure and soil types, this study performed capacity spectrum method(CSM) under the seismic load. A intersection point of capacity curve and demand curve is performance point. In this paper, after searching for performance point according to return period, performance level is evaluated.