带转换层的高层建筑结构抗震分析

发布时间：2018-10-23 10:12

【摘要】：高层建筑一般是受到国家的经济发展、科学技术的突飞猛进、可用于建设的土地不断减少、水泥和钢铁材料的应用等诸多因素的影响而逐步的发展。各国的高层结构是国家经济力量的体现和科研水准提升的标志,在实际高层建筑结构工程设计中,不仅需要考虑结构的承重情况,而且需要充分考虑建筑的功能、社会、文化、经济等方面的因素。为了满足多样化的高层建筑的使用要求,其上层结构需设计成小空间、下层设计成大空间,同时带有转换层的结构形式,采用合理的结构形式进行结构设计。论文采用PKPM和EPDAPUSH有限元分析软件,对某带转换层的高层建筑结构进行抗震性能分析。主要研究内容和结果如下:1)结合某商业广场商业办公楼前期方案,对带转换层的高层结构进行抗震性能分析,求取结构的模态频率、模态振型和层间位移角。2)通过改变转换层位置,对多个高层结构模型采用振型分解反应谱法,分析转换层位置对结构剪力、倾覆力矩等的影响,结果表明,转换层的布置位置越高,则对高层建筑结构在地震荷载作用下的动力稳定性越不利。3)针对高层建筑结构进行弹性时程验算,考察结构层间位移角和地震剪力图变化规律,并与振型反应谱法得到的结果进行对比。改变模型的等效侧向刚度比,进行反应谱分析,研究等效侧向刚度比对结构的位移和剪力分配的影响。4)对高层建筑结构进行PUSHOVER分析,考察结构在罕遇地震作用下是否满足规范的抗震设防要求,结果表明结构最大层间位移角小于规范规定的极限值,结构能够满足大震不倒的抗震设防规定。
[Abstract]:High-rise buildings are developed step by the economic development of the country, the rapid development of science and technology, the continuous decrease of land available for construction, the application of cement and iron and steel, and so on. The high-rise structure of every country is the symbol of the national economic strength and the improvement of the scientific research level. In the actual high-rise building structural engineering design, not only the load-bearing situation of the structure should be considered, but also the function, society and culture of the building should be fully considered. A factor in the economy, etc. In order to meet the requirements of various high-rise buildings, the upper structure should be designed into small space, the lower layer should be designed into large space, and at the same time, the structural form with transition layer should be adopted to design the structure with reasonable structure form. In this paper, PKPM and EPDAPUSH finite element analysis software are used to analyze the seismic behavior of a tall building with transfer story. The main research contents and results are as follows: 1) the seismic performance of the high-rise structure with the transfer floor is analyzed in combination with the preliminary plan of a commercial office building in a commercial square, and the modal frequency of the structure is obtained. By changing the position of the transfer layer, the mode decomposition response spectrum method is used to analyze the influence of the position of the transfer layer on the shear force and the overturning moment. The higher the location of the transfer floor, the more disadvantageous the dynamic stability of high-rise building structure under earthquake load. 3) the elastic time history checking calculation is carried out for high-rise building structure, and the variation law of displacement angle between layers and seismic shear force is investigated. The results are compared with the results obtained by the mode response spectrum method. By changing the equivalent lateral stiffness ratio of the model, the response spectrum analysis is carried out, and the influence of the equivalent lateral stiffness ratio on the displacement and shear distribution of the structure is studied. 4) the PUSHOVER analysis of the high-rise building structure is carried out. The results show that the maximum interstory displacement angle of the structure is less than the limit value specified in the code, and the structure can satisfy the seismic fortification requirement of strong earthquake.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.31

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