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现有超高层建筑中较多采用一种带伸臂桁架的巨型柱框架-核心筒结构形式。为研究其竖向地震作用反应,以巨型柱框架-核心筒结构为研究对象,在分析结构自振特性的基础上,通过反应谱分析和时程分析,研究该结构在水平地震作用下和水平与竖向地震共同作用下的反应。结果表明:与仅有水平地震作用相比,巨型柱轴力、梁的跨中弯矩和环带桁架的轴力均增大,且增幅随结构高度的增加而增大;竖向地震作用对基底剪力和楼层侧移的影响不明显,对梁的跨中弯矩影响显著,在楼层较高的区域,巨型柱轴力、梁的跨中弯矩和环带桁架轴力分别增大了10.0%、29.6%和12.4%。
In the existing super tall buildings, a huge column frame with core-column structure is used. In order to study the vertical seismic response, taking the giant column frame-core tube structure as the research object, based on the analysis of the natural vibration characteristics of the structure, through the response spectrum analysis and time history analysis, this structure is studied under horizontal earthquake and horizontal Reaction with vertical earthquake. The results show that, compared with the horizontal seismic action, the axial force of the giant column, the midspan moment of the beam and the axial force of the truss are all increased, and the amplitude increases with the increase of the height of the structure. The vertical seismic action The influence of base shear and floor lateral displacement is not obvious, which has a significant influence on the midspan moment of the beam. In the area with high floors, the axial force of the giant column, the midspan moment of the beam and the axial force of the truss are increased 10.0%, 29.6% and 12.4%.