大跨度格构式钢框架结构受力性能的分析研究

发布时间：2018-04-24 16:45

本文选题：大跨度钢结构 + 格构式钢框架　；参考：《苏州科技大学》2017年硕士论文

【摘要】：近年来,大跨度钢框架结构发展速度十分迅猛,结构形式越来越复杂,使用规模也呈现扩大化的趋势。其中,大跨度格构式钢框架结构则是比较有代表性的一种结构形式,它能够使钢材的轻质、高强等性能得到最大化的发挥,是一种比较合理的形式,其具有优美的空间形式、合理的受力分布、较低的用钢量等优点。本文是以苏州中心J地块的中庭大跨度格构式钢框架结构为研究对象,由于大跨度格构式钢框架结构形式复杂,属于多次超静定结构,使用过程中存在的影响因素较多,结构在各种工况下的受力性能和变形规律等方面的研究较少,因此,使用适当的方法对其在使用阶段的力学性能进行分析就成了重要的问题,同时也对这种结构形式的设计具有重要的意义。通过与实腹式钢框架结构方案的比选,论证了格构式钢框架方案在大跨度结构中的合理性,即格构式结构方案的内力分布更加合理且更省材料。同时,利用有限元分析软件SAP2000建立相应的结构模型,在竖向荷载、温度、地震作用下,对其在使用阶段的受力性能进行分析,研究大跨度格构式钢框架结构的内力和变形分布规律,发现结构杆件以承受轴力为主,弯矩和剪力较小,受力较大的杆件主要集中在结构第四榀首层的梁柱节点处。并选择了受力较大一榀框架,以其梁柱节点为研究对象,建立简化模型,通过有限元软件分析不同的节点构造形式的对节点的应力分布影响,可以得出,节点区域布置杆件的形式传力路径更为清晰,有利于结构梁柱之间传力。在上述研究的基础上,对大跨度格构式钢框架的设计提出相关建议。
[Abstract]:In recent years, the large span steel frame structure develops very fast, the structure form is more and more complex, the use scale also presents the tendency of expansion. Among them, the large-span latticed steel frame structure is a representative structure form, which can maximize the performance of steel, such as light weight, high strength, is a more reasonable form, it has a beautiful space form. Reasonable force distribution, low steel consumption and other advantages. In this paper, the large-span latticed steel frame structure of the central J block in Suzhou is taken as the research object. Due to the complexity of the large-span latticed steel frame structure, which belongs to the statically indeterminate structure for many times, there are many influencing factors in the process of use. There are few studies on the mechanical properties and deformation laws of structures under various working conditions. Therefore, it is an important problem to use appropriate methods to analyze the mechanical properties of structures in service stage. At the same time, it is of great significance to the design of this kind of structure. The rationality of the lattice steel frame scheme in the long span structure is demonstrated by comparing it with that of the solid web steel frame structure, that is, the distribution of internal force of the lattice structure scheme is more reasonable and less material. At the same time, the finite element analysis software SAP2000 is used to establish the corresponding structural model. Under the action of vertical load, temperature and earthquake, the mechanical behavior of the model is analyzed. The distribution of internal force and deformation of long-span latticed steel frame structure is studied. It is found that the members of the structure are mainly subjected to axial force, the bending moment and shear force are small, and the members with a large force are mainly concentrated at the Liang Zhu node of the fourth first floor of the structure. Taking Liang Zhu node as the research object, the simplified model is established, and the stress distribution of different joint structures is analyzed by finite element software. The formal force transfer path of the members arranged in the node area is more clear, which is beneficial to the transmission between Liang Zhu structures. On the basis of the above research, some suggestions on the design of long-span lattice steel frame are put forward.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU391

【参考文献】