马鞍索网结构提升张拉成型研究

发布时间：2018-12-06 13:35

【摘要】：大跨度的空间索结构不仅具有牵引结构的一般特性,并且具有自平衡特性。由于建筑中间有一个较大的开口,使其在结构上具有了非常好的适用性,可适用于大型体育场馆等公共性建筑。目前此类结构在外国已得到较多使用,而中国刚刚开始将此类结构应用于大型建筑场地。目前,中国研究的结构少,且研究结构成形技术更少。针对此类结构,模拟成形过程是模拟远程空间索结构构造的必要部分。某工程屋面结构使用径向索数量较多,并形成较大的力量后拉索。某工程屋盖为国内跨度最大而且径向索数量最多的马鞍形索网结构体系。由于这种结构特性决定了结构形成过程的复杂性和成型组件结构的难度,从装配到形成结构,刚度基本不存在,结构具有强几何非线性,形成构造难度高,形状控制困难,施工会特别困难。采用有限元分析软件ANSYS对体育场马鞍形索网结构施工全过程进行施工仿真分析,结合施工过程中对结构整体成形过程的实时监测,研究索网结构从起始位置到最后成形设计位置的全过程和各种力学指标的变化过程,从而不断改进并得到最优施工方案。主要内容:1)分析吊装过程,对结构整体成型方案进行确定;2)建立有限元分析模型,对索结构吊装成形过程进行显式动力学分析,得到整体过程的结构轴力分布;3)进行结构张拉静力学分析,得到整体的轴力分布情况。
[Abstract]:The long span space cable structure not only has the general characteristics of the traction structure, but also has the self-balance characteristic. Because there is a large opening in the middle of the building, it has a very good applicability in structure and can be applied to public buildings such as large stadiums and gymnasiums. Such structures are now widely used in foreign countries, and China is just beginning to apply them to large construction sites. At present, there is less research on structure in China and less on structural forming technology. For this kind of structure, simulating forming process is an essential part of simulating the construction of remote space cable structure. The number of radial cables used in roof structure of a certain project is more, and a large force is formed. The roof of a certain project is a saddle cable net system with the largest span and the largest number of radial cables in China. Because this kind of structure characteristic determines the complexity of structure formation process and the difficulty of forming component structure, from assembling to forming structure, the stiffness of the structure basically does not exist, the structure has the strong geometric nonlinearity, the formation structure is difficult to form, the shape control is difficult. The construction will be particularly difficult. The finite element analysis software ANSYS is used to simulate and analyze the whole construction process of the saddle cable-net structure of the stadium, and the real-time monitoring of the whole forming process of the structure is combined with the construction process. The whole process from the initial position to the final design position of the cable-net structure and the changing process of various mechanical indexes are studied, so that the optimal construction scheme can be obtained. The main contents are as follows: 1) analyzing the hoisting process and determining the whole structure forming scheme; 2) establishing the finite element analysis model, making explicit dynamic analysis on the hoisting forming process of the cable structure, and obtaining the axial force distribution of the whole structure. 3) the axial force distribution of the whole structure is obtained by tensile statics analysis.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU758.1

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