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通过有限元软件SATWE建立了32层框架-核心筒结构的三维模型,将加强层数量作为变量,对5种水平加强层设置方案进行自振特性及内力的分析,采用有限元软件SAP2000对外框架柱受力突变情况进行了分析。结果表明:加强层可有效减小结构前两个振型的周期,且对结构振动类型无影响;加强层设置层数越多,结构自振周期减小效果越好,但减小效率逐渐降低;加强层会引起结构内力分配上的突变。最后在总结归纳地震作用,分析加强层的设置对结构自振周期、内力分配及突变的影响规律的基础上,对加强层的设置提出了建议。
Through the finite element software SATWE, a three-dimensional model of a 32-layer frame-core tube structure was established. The number of reinforcement layers was taken as a variable to analyze the natural vibration characteristics and internal forces of five horizontal reinforcement schemes. The finite element software SAP2000 external frame Force mutation situation was analyzed. The results show that the strengthening layer can effectively reduce the period of the first two modes and has no influence on the type of structure vibration. The more the number of layers is, the better the period of natural vibration reduction is, but the decreasing efficiency gradually decreases Reinforcing layers cause sudden changes in the distribution of internal forces in the structure. Finally, based on the summary of the earthquake action and the analysis of the influence of the reinforcement layer on the natural period, internal force distribution and abrupt change of the structure, some suggestions are put forward.