本文選題：網(wǎng)格結(jié)構(gòu) + 粘鋼加固　； 參考：《南昌工程學(xué)院》2017年碩士論文

【摘要】：目前空間網(wǎng)格結(jié)構(gòu)隨著我國(guó)經(jīng)濟(jì)的發(fā)展而得到了跨越式的增長(zhǎng),同時(shí)也因其組裝方便,輕巧,造型美觀從而被廣泛應(yīng)用于民用與工業(yè)建筑中。不過由于早期網(wǎng)格結(jié)構(gòu)由于設(shè)計(jì)、施工以及后期維護(hù)的過程中對(duì)于鋼材本身并沒有做出較多保護(hù)措施,導(dǎo)致網(wǎng)格結(jié)構(gòu)開始出現(xiàn)各類失效問題,重新拆除再建耗費(fèi)人力、物力、財(cái)力。因此對(duì)于此類網(wǎng)格結(jié)構(gòu)維修加固有著重大意義。目前有關(guān)于網(wǎng)架結(jié)構(gòu)加固的研究一部分是主要以結(jié)構(gòu)安全性為前提的設(shè)計(jì)型研究,另一部分是針對(duì)加固前后的有限元模型對(duì)比分析,對(duì)加固后整個(gè)結(jié)構(gòu)力學(xué)性能進(jìn)行研究。但傳統(tǒng)的研究手段大部分都基于單一尺度下的分析對(duì)比,在進(jìn)行桿系單元分析時(shí)缺少細(xì)部結(jié)構(gòu)的分析,而在進(jìn)行純實(shí)體單元建模時(shí)對(duì)整個(gè)結(jié)構(gòu)模型進(jìn)行模擬工作量巨大且對(duì)計(jì)算機(jī)要求太高,并且一般對(duì)于空間網(wǎng)格結(jié)構(gòu)加固的分析是按彈性分析方法得到的數(shù)值結(jié)果,但對(duì)于加固后的結(jié)構(gòu)進(jìn)入到塑性階段時(shí)的受力分析研究較少,大部分設(shè)計(jì)人員在進(jìn)行粘鋼加固分析時(shí)直接用替換桿件的方法進(jìn)行數(shù)值模擬,對(duì)于該類方法在進(jìn)行彈塑性分析時(shí)正確與否并沒有準(zhǔn)確的論斷。基于此,本文主要開展網(wǎng)格結(jié)構(gòu)的多尺度建模分析以及粘鋼加固研究。本文共分四章:第一章討論了目前國(guó)內(nèi)外加固技術(shù)的進(jìn)展及常用的加固方法,并對(duì)各種方法的加固原理進(jìn)行了論述,結(jié)合目前網(wǎng)格結(jié)構(gòu)發(fā)生的事故,探討預(yù)防事故發(fā)生的對(duì)策;第二章論述多尺度有限單元法的基本理論及發(fā)展?fàn)顩r,利用軟件與理論相結(jié)合的方法對(duì)比論證網(wǎng)格結(jié)構(gòu)中各類加固方法的優(yōu)劣性;第三章以水利廠房屋蓋結(jié)構(gòu)粘鋼加固方法為例,詳細(xì)模擬出結(jié)構(gòu)的宏觀整體模型與微觀球節(jié)點(diǎn)模型,利用多尺度模型分析粘鋼加固的結(jié)構(gòu)性能,探討加固后的結(jié)構(gòu)在進(jìn)入塑性階段時(shí)能否用桿件替換方法進(jìn)行數(shù)值模擬;第四章在進(jìn)行理論研究的同時(shí),對(duì)現(xiàn)有粘鋼加固的施工方法提出一些創(chuàng)新加固措施,可安全有效地用于網(wǎng)格結(jié)構(gòu)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.
【學(xué)位授予單位】：南昌工程學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV698.2

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