带加强层的某超限高层结构优化分析

Optimization analysis of an out-of-code high-rise building with strengthened storeys

某超限高层项目总高度164.0m,地上49层,采用混凝土框架-核心筒结构。文章针对核心筒Y向高宽比略大的特点,运用分析程序Midas Building建立有限元模型并布置了4种不同数量的加强层以分析其作用效果;主要进行了4种方案结构模型的自由振动、多遇地震下的反应谱以及罕遇地震下的动力弹塑性时程分析,所得结果可为同类工程提供参考。

An out-of-code high-rise building of 164. 0 m and 49 overground floors is analyzed for the structural height with concrete frame-core tube structure optimization. Four finite element models with different strengthened storeys are established using the analysis program MidasBuiiding to analyze the effect of lateral resisting optimization because the depth-width ratio of the core tube in Y direction is a little large. The free vibration analysis, response spectrum analysis under frequent earthquake and dynamic elastoplastic time-history analysis under rare earthquake are conducted in the comparative study. The results can provide a reference for the design of the similar kinds of projects.