| Title |
Design of Effective Tubular Structure Systems with Minimized Shear Lag Factor Distributions |
| Authors |
유은종 ; 박효선 ; 송화철 ; 안재현 ; 박칠림 |
| Abstract |
In the structural design of highrise buildings, the tubular structure system is most frequently adopted as a major lateral force resisting structural system. The efficiency of a tubular structure system may be measured by the shear lag factor defined as the ratio of the stress at the center column to the stress at the corner column in a flange frame in the system.In this paper, the effect of shear lag on the efficiency of tubular structural systems is investigated by the use of fundamental building plan forms in design of tubular structure systems for highrise buildings. Three 100-story pure tubular structures with typical plan forms such as square, octagon, and circle are modeled and analysed for determining the shear lag factor distributions along the height of the pure tubular structures. It clearly shows the dependency of shear lag effect on the selection of plan forms. As an application of the concept, a hybrid tubular structure system is developed and presented. The behavior of the system is investigated in terms of several design criteria. Finally, the efficiency of the system is tested by computing the amount of steel used in the model and comparing it with other tubular buildings of similar height. |