超长双层网壳结构地震控制研究

发布时间：2018-01-26 20:13

本文关键词： 超长网壳结构地震控制粘滞阻尼器多维　出处：《河北联合大学》2014年硕士论文　论文类型：学位论文

【摘要】：近些年来随着建筑技术和先进理论的发展，超长网壳结构开始逐渐出现在人们的视野中，并开始逐步应用于一些重要的建筑上。地震作用一直是结构设计中的重要因素，采取经济合理的抗震措施需要我们不断地进行探索。网壳结构由于结构比较合理、自重较轻等原因，对其抗震研究方面在初期没有受到过多重视。超长结构由于结构的柔性大，在地震作用时的动力响应比较明显，因此使用合理的减震措施是十分必要的。结构的地震控制的方法很多，文中采用粘滞阻尼器替代结构杆件的方式，在地震波作用下，对一长270m、宽60m的超长网壳结构进行地震分析，主要选择了两种实测波和一种人工波对结构在无控作用下进行地震波的输入，得出结构的振型及各阶频率。分别用粘滞阻尼器超长双层网壳相同数量的上弦杆、下弦杆和腹杆进行替换，在考虑多维因素的情况下输入地震波，以结构选取节点的位移为研究对象，分析在不同地震波作用下采用这种地震控制措施时对结构产生的影响，，并通过数据的对比确定最优替换位置。为了在保证结构安全的情况下保证经济性，对同一面层的杆件进行不同数量的替换，通过结果的对比总结了替换数目对结构的影响，分析表明替换杆件的数量的增多能够提高地震控制的效果，但不是越多越好，要经过计算分析控制在一定的数量。通过本文研究证明了采用粘滞阻尼器对网壳结构杆件进行替换的方式可行，并能起到一定效果，这一结论为超长网壳结构结构设计提供了参考依据。
[Abstract]:In recent years, with the development of architectural technology and advanced theory, super-long latticed shell structure began to appear in people's vision. And began to gradually apply to some important buildings. Seismic action has been an important factor in structural design. Economic and reasonable seismic measures need to be continuously explored. The reticulated shell structure is reasonable in structure and light in weight. Due to the large flexibility of the structure, the dynamic response of the super-long structure under earthquake action is obvious, so it is necessary to use reasonable seismic absorption measures. There are many seismic control methods for the structure. In this paper, the viscous dampers are used to replace the structural members. Under the action of seismic waves, the seismic analysis of an ultra-long latticed shell structure with a length of 270 m and a width of 60 m is carried out. In this paper, two kinds of measured waves and one artificial wave are selected to input the seismic waves to the structure without control, and the modes and frequencies of the structure are obtained. The superlong double-layer latticed shell with viscous dampers is used to obtain the same number of upper chords, respectively. The lower chord and the web bar are replaced, and the seismic wave is input under the consideration of multi-dimensional factors. The displacement of the node of the structure is selected as the research object. This paper analyzes the influence of this kind of seismic control measures on the structure under the action of different seismic waves, and determines the optimal replacement position through the comparison of the data, in order to ensure the economy under the condition of ensuring the safety of the structure. Through the comparison of the results, the influence of the replacement number on the structure is summarized. The analysis shows that the increase of the number of replacement members can improve the effect of earthquake control. But not the more the better, through the calculation and analysis to control in a certain number. Through the study of this paper, it is proved that the viscous dampers are feasible to replace the latticed shell members, and can play a certain effect. This conclusion provides a reference for the structural design of super long latticed shells.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU399;TU352.11

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