带钢拱式转换层的混合框-筒结构抗震性能分析

发布时间：2018-06-13 09:58

本文选题：混合框-筒结构 + 抗震性能　；参考：《华中科技大学》2015年硕士论文

【摘要】：近几十年以来,特别是进入21世纪以后,随着社会的发展,人们对于建筑功能、建筑造型以及建筑结构的要求变得越发多样化。梁式转换结构构件的应用受到很多不利因素的牵制,而对于带钢构件拱式转换层的钢混框架核心筒结构,它的结构性能明显区别于梁式转换结构,对这种结构抗震性能方面的研究也很少。在这种背景下,针对混合框-筒结构并设有钢拱式转换层,本文研究了该结构关于抗震性能的相关内容。本文以一栋28层、高98.5的混合框-筒结构算例为研究对象,抗震设防烈度为7度(0.10 g)。运用ETABS9.0软件,针对转换层楼层高度不同的模型算例和上下弦杆线刚度比β不同的模型算例,用振型分解反应谱分析方法对这些算例进行计算,研究这两个变量的变化对小震作用下对结构抗震性能方面的影响及其影响规律。对转换层楼层高度为4 m,上下弦杆线刚度比β为2.18时的模型算例进行三条地震波作用下的弹性时程分析,这中方法得到的数据与前面讲述的谱法得到的数据进行了对比分析。研究结果表明:上下弦杆线刚度比β值较小时转换层结构整体刚度较小,其对转换层自身刚度的贡献比采用β值较大时对转换层自身刚度的贡献小;两种计算分析方法的数据结果对比发现,振型分解反应谱法的计算结果要比弹性时程分析的结果略小;应用到实际工程中去时候,应根据工程的结构布置,选择合适的转换层高和上下弦杆线刚度比。
[Abstract]:In recent decades, especially after entering the 21st century, with the development of society, the requirements of architectural function, architectural modeling and architectural structure become more and more diversified. The application of beam transfer structure is restrained by many unfavorable factors. However, for the steel-concrete frame-tube structure with arch transfer layer, its structural performance is obviously different from that of beam-type transfer structure. There is also little research on the seismic performance of this kind of structure. In this context, the seismic behavior of the hybrid frame-tube structure with steel arch transfer story is studied in this paper. In this paper, an example of a 28-story, 98.5 high hybrid frame-tube structure is studied, and the seismic fortification intensity is 0.10 g / m. By using ETABS9.0 software, the model examples with different height of transfer floor and different stiffness ratio of upper and lower chords are calculated by using the method of mode decomposition response spectrum analysis. The influence of these two variables on the seismic behavior of structures under the action of small earthquakes is studied. The elastic time history analysis of three seismic waves is carried out for the model with the transfer floor height of 4 m and the stiffness ratio of upper and lower chord lines 尾 = 2.18. The data obtained by this method are compared with those obtained by the spectral method described above. The results show that the overall stiffness of the transfer story structure is smaller than that of the upper and lower chords, and the contribution to the transfer layer stiffness is smaller than that of the transfer layer when the 尾 value is larger. By comparing the data of the two methods, it is found that the results of the mode decomposition response spectrum method are slightly smaller than those of the elastic time-history analysis, and that when applied to the actual engineering, the results should be arranged according to the structure of the project. Select the appropriate transfer floor height and upper and lower chord line stiffness ratio.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU973.17;TU973.31

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