| Title |
Superstructure Systems for Design of Highrise Buildings |
| Authors |
박효선 ; 송화철 ; 황진석 ; 유은종 ; 박칠림 |
| Abstract |
Efficiency of structural systems in the design of highrise buildings heavily depends on the proper selection of major load-bearing systems such as lateral force resisting systems and vertical force resisting systems. In a tubular structure system, which is most is most frequently adopted as major lateral force resisting structure system, major portion of vertical loads should be resisted by separate vertical resisting systems such as interior cores and columns. furthermore, the effect of shear lag in exterior tube frames, numerous number of joints required for forming tube frames, and inflexibility in volume design are major drawbacks in use of tubular structure systems for highrise buildings. In this paper, we explore the use of superstructure system consisting of several super columns, super girders, transfer floors, and large and small-scale bracings for highrise buildings. A superstructure system with height to width ratio of 8.15 is proposed for design of highrise buildings. The behavior of the system is investigated in terms of inter-story drifts, maximum lateral displacement, axial force distributions at columns, overturning moments, and dynamical characteristics under the action of vertical and lateral forces such as wind and seismic loads. |