近年来框架-核心筒结构在高层建筑中广泛应用,并且由于建筑功能的多样化使得结构体型越来越复杂,因此这就对复杂高层建筑结构分析和设计提出了新的要求,以上海世茂国际广场大楼这一实际工程为背景,对其开展弹塑性时程分析,探究该结构体系在各级地震作用下的抗震性能,首先建立了结构简化分析模型,选择了结构材料应力-应变关系和分析参数;接下来利用CANNY2005程序对模型振动台试验进行模拟计算,考察所采用的力学分析模型和计算参数的正确性,结果表明这些模型和参数能比较准确模拟框架-核心筒结构在地震作用下的变形特征;然后最后对原型结构在各级烈度地震作用下的变形进行分析,具体研究了该结构的层间位移角分布、典型构件变形模式;最后从整体上对结构的抗震性能做出相应的评价,目前该高层建筑业已竣工投入使用。
The frame-tube structure is used ever more extensively in modern high-rise buildings with the increase of structure height, and the structure configuration is also becoming more and more complex for the diversity of building function. As a result, new requirements are come up with for the design and analysis of the high-rise buildings. Elasto-plastic time history analysis on a super high-rise building named Shanghai Shimao International Plaza is carried out in this paper to study the seismic behavior of this structure under different earthquake intensities. First the simplified analytical model, the material stress-strain relation and the analytical parameters are achieved. Then the simulation of shaking table model test using CANNY 2005 program is carried out to validate the selected element analytical models and analytical parameters. The result shows that the analytical models and parameters are accurate and powerful in simulating the seismic re- sponse of the frame-tube structure, and the elasto-plastic seismic response of prototype structure is calculated under different earthquake intensities. The inter-story drift distribution and deformation pattern of the representative elements are discussed in detail. Finally the seismic behavior of this building is evaluated based on these results. The construction of the building has been completed.