本文選題：卸載方法 + 臨時支撐��； 參考：《南昌大學(xué)》2011年碩士論文

【摘要】：鋼結(jié)構(gòu)作為一種古老而又充滿活力的材料隨著我國鋼鐵的產(chǎn)業(yè)帶來了翻天覆地變化。加之我國承辦各類國際國內(nèi)大型體育運(yùn)動會或者展覽會,越來越多的體育場結(jié)構(gòu)和會展場館不斷建成。大跨度空間鋼結(jié)構(gòu)完美的實(shí)現(xiàn)了大型公共活動的使用要求,不僅僅是從建筑美學(xué)方面,而且也能滿足力學(xué)的要求。但是值得發(fā)現(xiàn)的是,現(xiàn)階段大跨空間結(jié)構(gòu)面臨著施工方法的多元化和復(fù)雜化,造成施工階段時結(jié)構(gòu)的內(nèi)力分布較為復(fù)雜,設(shè)計(jì)使用的主體結(jié)構(gòu)受力隨著施工過程不斷變化。施工階段最為關(guān)鍵也是最后實(shí)施的步驟即為臨時支撐的卸載。臨時支撐的卸除過程會導(dǎo)致主體結(jié)構(gòu)內(nèi)力不斷重分布,給結(jié)構(gòu)在施工中的安全帶來危險性,所以有必要針對大跨度空間結(jié)構(gòu)進(jìn)行全過程的卸載過程的模擬,了解不同施工方法下卸載過程的應(yīng)力變化規(guī)律。 本論文以某體育館建設(shè)為研究的背景,通過有限元ANSYS軟件對其進(jìn)行建模和卸載過程模擬。該論文主要作了以下幾個方面的研究： (1)采用等效的思想把大型大跨空間結(jié)構(gòu)歸類于用聯(lián)系桿連接起來的多跨梁體系,并采用不同的卸載方法對此等效體系進(jìn)行卸載模擬研究。用簡單的形式算出的有限元結(jié)構(gòu)來指導(dǎo)實(shí)際施工過程。通過評價指標(biāo)的建立可獲得卸載可靠度指標(biāo)。 (2)對空間網(wǎng)架進(jìn)行施工階段的彈性受力分析,得到網(wǎng)架結(jié)構(gòu)在卸載過程中主體構(gòu)件的內(nèi)力分布與大小變化。并從數(shù)值上判斷了四種卸載方式的優(yōu)劣,研究了不同卸載方式對主體結(jié)構(gòu)應(yīng)力重分布和變形的影響。 (3)采用有有限元分析軟件,建立實(shí)際體育場的模型,考慮不同的卸載方式模擬施工情況。采用幾何非線性分析理論對臨時支撐胎架體系分別進(jìn)行特征值屈曲分析和帶缺陷的幾何非線性分析,判斷所用的臨時支撐胎架體系的整體穩(wěn)定性情況。研究不同的材料屬性變化影響下的胎架結(jié)構(gòu)穩(wěn)定性能。
[Abstract]:As an old and energetic material, steel structure has brought great changes along with the steel industry in China. In addition, China hosts all kinds of international and domestic sports games or exhibitions, more and more stadium structures and exhibition venues are constantly built. The large span space steel structure perfectly realizes the use requirement of large-scale public activities, not only from the aspect of architectural aesthetics, but also to meet the requirements of mechanics. However, it is worth discovering that at present, the large-span spatial structure is facing the diversification and complication of construction methods, which results in the complex distribution of internal force of the structure during the construction stage, and the force of the main structure used in the design is constantly changing with the construction process. The most critical and final stage of construction is the unloading of temporary support. The unloading process of temporary braces will lead to the redistribution of the internal forces of the main structure, which will bring danger to the safety of the structure in construction. So it is necessary to simulate the whole process of unloading for the long-span spatial structure. Understand the stress variation law of unloading process under different construction methods. In this paper, based on the background of the construction of a gymnasium, the finite element ANSYS software is used to model and simulate the unloading process of the gymnasium. This paper mainly makes the following aspects of research: 1) the large span spatial structures are classified into multi-span beam systems connected with connecting rods by using the equivalent idea, and the unloading simulation of this equivalent system is carried out by using different unloading methods. The finite element structure is calculated in simple form to guide the actual construction process. The unload reliability index can be obtained by establishing the evaluation index. 2) the elastic force distribution and size change of the main components of the space truss during the unloading process are obtained by analyzing the elastic force of the space truss in the construction stage. The advantages and disadvantages of the four unloading modes are judged numerically, and the effects of different unloading modes on the stress redistribution and deformation of the main structure are studied. Using finite element analysis software, the model of the actual stadium is established, and different unloading modes are considered to simulate the construction situation. The geometric nonlinear analysis theory is used to analyze the eigenvalue buckling and geometric nonlinearity with defects of the temporary braced tire frame system, respectively, and to judge the overall stability of the temporary braced tire frame system. The stability of the tread structure under the influence of different material properties was studied.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TU391

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郭彥林,崔曉強(qiáng);大跨度復(fù)雜鋼結(jié)構(gòu)施工過程中的若干技術(shù)問題及探討[J];工業(yè)建筑;2004年12期

2 陳國棟,郭彥林,葉浩文,顧國榮,李鴻生;廣州市新體育館屋蓋吊裝及拆撐過程動態(tài)分析[J];建筑結(jié)構(gòu);2002年01期

3 郭彥林,繆友武,婁俊杰,林冰,徐衍林,崔巍;澳門綜合體育館主桁架整體提升及提升塔架分析[J];建筑結(jié)構(gòu)學(xué)報;2005年01期

4 伍小平,高振鋒,李子旭;國家大劇院鋼殼體施工全過程模擬分析[J];建筑結(jié)構(gòu)學(xué)報;2005年05期

5 范重;劉先明;范學(xué)偉;胡純煬;胡天兵;吳學(xué)敏;郁銀泉;;國家體育場大跨度鋼結(jié)構(gòu)設(shè)計(jì)與研究[J];建筑結(jié)構(gòu)學(xué)報;2007年02期

6 孟可;;剖析與推演——南昌國際體育中心體育場設(shè)計(jì)[J];建筑技藝;2011年Z2期

7 崔曉強(qiáng),高振峰,李子旭,伍小平;大型復(fù)雜臨時支撐簡化分析方法[J];空間結(jié)構(gòu);2005年01期

8 范志良;結(jié)構(gòu)工程科學(xué)中若干計(jì)算結(jié)構(gòu)力學(xué)問題的研究展望[J];力學(xué)進(jìn)展;1994年03期

9 邱德隆;李久林;楊俊峰;高樹棟;范重;魏義進(jìn);;國家體育場鋼結(jié)構(gòu)支撐卸載分析[J];施工技術(shù);2006年12期

10 王海濤;彭前立;張宇;;沈陽奧林匹克體育中心體育場工程鋼結(jié)構(gòu)施工技術(shù)[J];施工技術(shù);2008年05期

相關(guān)博士學(xué)位論文 前1條

1 史洪泉;大跨度空間鋼結(jié)構(gòu)施工全過程力學(xué)分析及考慮施工影響的若干要素研究[D];東南大學(xué);2005年

，

本文編號：1968337