设内拉环的肋环型索穹顶的静动力特性分析

发布时间：2018-06-29 21:04

本文选题：设内拉环的肋环型索穹顶结构 + 张拉整体结构　；参考：《西南交通大学》2014年硕士论文

【摘要】：索穹顶结构是一种柔性张拉整体结构,主要由拉索和压杆组成,依靠施加预应力使结构达到所设计的几何形状和结构刚度,该结构形式最大的特点就是在承受外荷载的时候,结构发生变形的同时杆件的预应力分布也随之改变,从而在变形的过程中逐步调整承载能力。跨度大、自重轻、造价低、结构受力合理及建筑造型新颖这些特点,使索穹顶在大跨空间结构形式中脱颖而出,近年来颇受关注。索穹顶的结构形式当中最经典的就是Geiger型和Levy型,也叫做肋环型和联方型,此外,还有Kiewitt型、混合型和鸟巢型。目前,国际上已有数十座建筑运用了这种结构形式且取得了较好的应用效果,积累了丰富的理论及实践经验。本文的研究内容主要有：(1)回顾了索穹顶结构的发展历程,介绍了索穹顶的分类,阐述了国内外主要的研究现状,并提出了本文的主要研究内容。(2)对一设有内拉环的肋环型索穹顶结构进行加载历程分析,分析各构件内力和节点位移随加载的变化规律。然后对其进行参数分析,研究初始预应力水平、索杆截面面积、结构矢高、压杆高度、结构跨度对受力性能的影响。(3)对上述设有内拉环的肋环型索穹顶结构进行模态分析,分析其前100阶自振频率的分布和自振振型的特点。进而对其进行参数分析,研究其自振频率和自振振型随初始预应力水平、索杆截面面积、结构矢高、压杆高度和跨度变化的规律。(4)本文还对设内拉环的肋环型索穹顶结构进行了抗震时程分析,采用水平向、竖向和三维地震输入对结构进行了多遇地震的时程分析,并对结构的位移和内力响应进行了研究。(5)优化模型并对其进行静力加载分析和模态分析。(6)总结本文的主要结论,并指出还可进一步深入的研究工作。
[Abstract]:Cable dome structure is a flexible tensioning structure, which is mainly composed of cables and compression rods. The structure can reach the designed geometric shape and structural stiffness by applying prestressing force. The biggest characteristic of the structure is when it is subjected to external loads. With the deformation of the structure, the prestress distribution of the member also changes with it, and the bearing capacity is adjusted step by step during the process of deformation. The characteristics of large span, light weight, low cost, reasonable structural force and novel architectural modeling make cable dome stand out in the form of long-span spatial structure, which has attracted much attention in recent years. Among the structural forms of cable-dome, the classical ones are Geiger type and Levy type, also called rib ring and joint square type, in addition, there are Kiewitt type, mixed type and bird's nest type. At present, dozens of buildings in the world have used this kind of structure form and obtained good application effect, and accumulated rich theory and practical experience. The main contents of this paper are as follows: (1) reviewing the development course of cable dome structure, introducing the classification of cable dome, expounding the main research status at home and abroad. The main contents of this paper are also presented. (2) the loading history of a ribbed ring cable dome structure with internal pull ring is analyzed, and the variation of internal force and joint displacement with loading is analyzed. Then the influence of the initial prestress level, the cross-section area of the cable rod, the height of the structure vector, the height of the compression bar and the span of the structure on the mechanical performance is studied. (3) the modal analysis of the above rib ring cable dome structure with internal pull ring is carried out. The distribution of the first 100 order natural vibration frequency and the characteristics of the natural vibration mode are analyzed. Then the parameter analysis is carried out, and the natural vibration frequency and vibration mode are studied with the initial prestress level, the cross-section area of the cable bar, the height of the structural vector. (4) the seismic time history analysis of the rib ring cable dome structure with internal tension ring is also carried out. The seismic time history analysis of the structure is carried out by using horizontal, vertical and three-dimensional earthquake input. The displacement and internal force response of the structure are studied. (5) the optimization model is optimized and the static loading analysis and modal analysis are carried out. (6) the main conclusions of this paper are summarized and it is pointed out that further research work can be carried out.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU399

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