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为了对框架一核心筒结构进行进一步研究,使其能够更好的在工程实际中运用。本文用Pushover方法和弹塑性动力时程方法,分析了混凝土框架一核心筒结构在罕遇地震下的结构响应,通过Pushover方法得到了不同侧向加载模式下结构的塑性铰发展、顶点位移曲线、基底剪力曲线、楼层位移包络曲线。由两种分析结果,发现高层混凝土框架一核心筒结构在罕遇地震作用下,结构中上部梁和底层柱易破坏。对比两种分析方法,得出Pushover分析方法与时程分析结果类似,其中倒三角荷载分布模式结构响应与时程分析结果最相近。
In order to further study the frame-core structure, it can be better used in engineering practice. In this paper, Pushover method and elasto-plastic dynamic time-history method are used to analyze the structural response of a core-frame structure of concrete frame under rare earthquakes. The plastic hinge development and the vertex displacement curve under different lateral loading modes are obtained by Pushover method. Base shear curve, floor displacement envelope curve. From the results of two kinds of analysis, it is found that under the action of rare earthquakes, the core-column structure of high-rise concrete frame is easily damaged by the upper beam and the bottom column in the structure. Comparing the two methods, the Pushover method is similar to the time-history method, in which the structure response of the inverse triangular load distribution model is the closest to the time-history analysis.