带有转换层的建筑结构抗连续倒塌能力分析

发布时间：2018-06-10 07:26

本文选题：转换层 + 连续倒塌　；参考：《西安科技大学》2017年硕士论文

【摘要】：在国外对于连续倒塌的研究已经经历了三次革命,从第一次的英国公寓倒塌到最近的的美国“911”纽约世贸中心发生连续倒塌,四十年间国外学者对于建筑结构抗连续倒塌的规范已经在不断完善,以美国和欧洲规范为例GSA2003和DOD2010都较为系统的对如何抵抗连续倒塌做了说明。但是我们国家对于连续倒塌的研究处于一个开始状态,当下还没有可行的抗倒塌实施方案和设计思路。我国城市建筑中框架结构和框剪结构居多,但是带有转换层的高层结构在近几年发展十分迅速。所以,对带转换层的建筑结构进行抗倒塌模拟研究不但可以弥补学术空白,还能够对我国高层结构设计规范进行完善。本文主要研究内容如下:(1)采用SAP2000有限元模拟软件进行分析,分别使用了线性分析和非线性分析,弹性和弹塑性四种分析方法对模型首层长边的中柱进行了拆除,对比分析了四种方法的不同以及优势,证明了非线性动力分析是一种真实可靠但耗时长的分析手段。(2)采用非线性动力分析方法对建筑结构不同楼层的不同位置结构柱进行了模拟拆除分析,通过失效柱顶点位移时程曲线判断各个构件的抗倒塌能力储备。(3)利用非线性静力PUSH-OVER分析方法对不同层不同位置的构件进行拆除,作为动力分析的补充说明,最终通过构件顶点位移加载曲线来判断结构是否会失效以及各个构件的抗倒塌能力排名。(4)通过各位置结构柱抗倒塌能力排名对比,找出最不利部位,在设计上对该构件进行加强,具体方式可以选择加强混凝土和钢筋强度。
[Abstract]:The study of successive collapses abroad has undergone three revolutions, from the first collapse of a British apartment to the recent successive collapse of the World Trade Center in New York, New York. During the past 40 years, foreign scholars have been perfecting the codes for the continuous collapse of building structures. Taking the American and European codes as examples, GSA2003 and DOD2010 have systematically explained how to resist the continuous collapse. However, the research on continuous collapse in our country is in a beginning state, and there is no feasible anti-collapse implementation plan and design idea at present. The frame structure and frame shear structure are the majority of urban buildings in our country, but the high-rise structure with transfer story has developed rapidly in recent years. Therefore, the simulation study of building structure with transfer floor can not only make up for the academic gap, but also improve the design code of high-rise structure in China. The main contents of this paper are as follows: (1) the finite element simulation software SAP2000 is used to analyze the model. Four analysis methods, linear analysis and nonlinear analysis, elastic analysis and elastic-plastic analysis, are used to remove the middle columns with long edges on the first floor of the model. The differences and advantages of the four methods are compared and analyzed. It is proved that nonlinear dynamic analysis is a real and reliable but time-consuming analysis method. The nonlinear dynamic analysis method is used to simulate the demolition of different structural columns on different floors of building structures. The collapse resistance reserve of each member is judged by the time-history curve of the peak displacement of the failure column. The nonlinear static PUSH-OVER analysis method is used to remove the members at different positions of different layers, which is used as a supplementary explanation for the dynamic analysis. Finally, judging whether the structure will fail or not by the displacement loading curve of the member vertex, and the rank of the anti-collapse ability of each member. (4) by comparing the rank of the collapse resistance of the structural column in each position, we find out the most disadvantageous part. In design, the concrete strength of concrete and steel bar can be strengthened.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973

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