Seismic analysis for a new-type hybrid structure of steel reinforced concrete frame-four corner tubes-bidirectional steel truss
【Abstract】 The podium of CNOOC Shenzhen Building is a four-story large-span structure with 24. 5 meters height,and situated between two super high-rise towers. To fulfill the requirements of the local municipal planning and architecture functions,the interior of the podium should supply 33. 6 meters astylar space and the perimeter of the structure should supply 50. 4 meters and 27. 6 meters large-span space in two directions,a new-type structure was proposed for the podium,named as steel reinforced concrete( SRC) frame-four corner tubes-bidirectional steel truss hybrid structural system. The shear wall tube and SRC columns worked as vertical lateral force resisting components,while the cross-layer steel trusses could realize the internal force transmission between lateral force resistance components and supply the conditions for reasonable layout of beam and floor members. Elasto-plastic time-history analysis for the structure under the rare earthquake was carried out by using the finite element method. The analysis results indicate that the displacement of the new-type structure can satisfy the seismic design requirements of Chinese codes. The damages of the four corner tubes focus on coupling beams. Large-span steel trusses keep non-yielding state. The damages on RC beams and steel beams can dissipate some dynamic energy. Therefore the rationality of the structural arrangement is verified.
- 【文献出处】 建筑结构 ,Building Structure , 编辑部邮箱 ,2015年07期