水利厂房空间网格结构粘钢加固技术研究

发布时间：2018-04-15 08:21

本文选题：网格结构 + 粘钢加固　；参考：《南昌工程学院》2017年硕士论文

【摘要】：目前空间网格结构随着我国经济的发展而得到了跨越式的增长,同时也因其组装方便,轻巧,造型美观从而被广泛应用于民用与工业建筑中。不过由于早期网格结构由于设计、施工以及后期维护的过程中对于钢材本身并没有做出较多保护措施,导致网格结构开始出现各类失效问题,重新拆除再建耗费人力、物力、财力。因此对于此类网格结构维修加固有着重大意义。目前有关于网架结构加固的研究一部分是主要以结构安全性为前提的设计型研究,另一部分是针对加固前后的有限元模型对比分析,对加固后整个结构力学性能进行研究。但传统的研究手段大部分都基于单一尺度下的分析对比,在进行杆系单元分析时缺少细部结构的分析,而在进行纯实体单元建模时对整个结构模型进行模拟工作量巨大且对计算机要求太高,并且一般对于空间网格结构加固的分析是按弹性分析方法得到的数值结果,但对于加固后的结构进入到塑性阶段时的受力分析研究较少,大部分设计人员在进行粘钢加固分析时直接用替换杆件的方法进行数值模拟,对于该类方法在进行弹塑性分析时正确与否并没有准确的论断。基于此,本文主要开展网格结构的多尺度建模分析以及粘钢加固研究。本文共分四章:第一章讨论了目前国内外加固技术的进展及常用的加固方法,并对各种方法的加固原理进行了论述,结合目前网格结构发生的事故,探讨预防事故发生的对策;第二章论述多尺度有限单元法的基本理论及发展状况,利用软件与理论相结合的方法对比论证网格结构中各类加固方法的优劣性;第三章以水利厂房屋盖结构粘钢加固方法为例,详细模拟出结构的宏观整体模型与微观球节点模型,利用多尺度模型分析粘钢加固的结构性能,探讨加固后的结构在进入塑性阶段时能否用杆件替换方法进行数值模拟;第四章在进行理论研究的同时,对现有粘钢加固的施工方法提出一些创新加固措施,可安全有效地用于网格结构的加固改造。
[Abstract]:With the development of China's economy, the spatial grid structure has been growing by leaps and bounds, and has been widely used in civil and industrial buildings because of its convenient assembly, light and beautiful appearance.However, due to the lack of protection measures for the steel itself in the process of design, construction and later maintenance of the early grid structure, the grid structure began to appear all kinds of failure problems, and the demolition and reconstruction of the grid structure cost manpower and material resources.Financial resourcesTherefore, it is of great significance for the maintenance and reinforcement of this kind of grid structure.At present, one part of the research on the reinforcement of the truss structure is mainly based on the structural safety, the other part is the comparative analysis of the finite element model before and after strengthening to study the mechanical properties of the whole structure after reinforcement.However, most of the traditional research methods are based on the single scale analysis and contrast.The simulation work of the whole structure model is too heavy and the computer requirement is too high, and the analysis of the reinforcement of the spatial grid structure is the numerical result obtained by the elastic analysis method.However, there is little research on the stress analysis of the strengthened structure when it comes to the plastic stage. Most of the designers directly use the method of replacing the bar to carry out the numerical simulation in the analysis of steel adhesive reinforcement.There is no accurate judgment as to whether the method is correct or not in elastic-plastic analysis.Based on this, this paper mainly carries out the multi-scale modeling and analysis of grid structure and the research of steel-bonded reinforcement.This paper is divided into four chapters: the first chapter discusses the development of reinforcement technology at home and abroad and the commonly used reinforcement methods, and discusses the reinforcement principles of various methods, combined with the current network structure accidents, discusses the countermeasures to prevent accidents;The second chapter discusses the basic theory and development of the multi-scale finite element method, and compares and demonstrates the advantages and disadvantages of various reinforcement methods in the grid structure by using the method of combining software and theory.In the third chapter, taking the method of steel-bonded reinforcement of the roof structure of water conservancy plant as an example, the macroscopic integral model and the microscopic spherical node model of the structure are simulated in detail, and the performance of the steel-bonded steel reinforced structure is analyzed by using the multi-scale model.This paper discusses whether the strengthened structure can be numerically simulated with the bar replacement method when it enters the plastic stage. In the fourth chapter, some innovative reinforcement measures are put forward for the existing construction methods of steel adhesive reinforcement while the theoretical research is carried out.It can be used safely and effectively in the reinforcement and reconstruction of grid structure.
【学位授予单位】：南昌工程学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV698.2

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