【摘要】：大型空間結(jié)構(gòu)建造過程中施工技術(shù)是至關(guān)重要的,方案選擇不合理會對結(jié)構(gòu)造成過大的初始應(yīng)力損傷,進(jìn)而對結(jié)構(gòu)產(chǎn)生嚴(yán)重安全隱患,因此,選擇合理施工方案和科學(xué)分析才能保證結(jié)構(gòu)的安全。本文以甘肅會展中心建筑群項目鋼結(jié)構(gòu)安裝為背景,通過對大跨度異型鋼桁架安裝過程中各桿件的數(shù)值分析和試驗研究,總結(jié)出鋼桁架在施工過程中的桿件應(yīng)力及位移分布規(guī)律,保證了安裝過程的安全,避免了過大的初始應(yīng)力損傷,實現(xiàn)了聯(lián)機(jī)控制安裝過程,主要研究內(nèi)容如下: 1)綜合評述了大跨度異型鋼結(jié)構(gòu)的應(yīng)用和發(fā)展情況,回顧了國內(nèi)外對空間結(jié)構(gòu)施工過程監(jiān)測和理論分析的研究現(xiàn)狀,總結(jié)了以往研究所取得的積極成果以及存在的不足; 2)應(yīng)用ANSYS非線性分析功能,建立了鋼桁架三維有限單元模型,計算了其吊點數(shù)量分別為2、4、6、8、10、12六種方案的桿件應(yīng)力、位移分布規(guī)律,最終優(yōu)化評定出最合理的8吊點吊裝方案; 模擬分析了支座安裝時鋼桁架的應(yīng)力、位移分布規(guī)律,用以控制施工的初始應(yīng)力損傷情況; 3)現(xiàn)場實測在吊裝階段和臨時固定階段兩榀鋼桁架主要受力桿件上弦桿、腹桿、下弦桿應(yīng)力值,并將結(jié)果實時傳輸給聯(lián)機(jī)控制軟件(由畢文萍同學(xué)編寫),以控制桿件應(yīng)力的最大值; 4)最后,將鋼桁架施工前的數(shù)值計算優(yōu)化結(jié)果與施工時的現(xiàn)場試驗實測值進(jìn)行對比分析,得到鋼桁架在吊裝階段和臨時固定階段各桿件應(yīng)力分布曲線,總結(jié)應(yīng)力分布規(guī)律,對今后類似鋼桁架施工及設(shè)計工作提出了建議。
[Abstract]:The construction technology is very important in the construction process of large space structure. The unreasonable selection of the scheme will cause excessive initial stress damage to the structure, and then cause serious hidden danger to the structure. Selection of reasonable construction scheme and scientific analysis can ensure the safety of the structure. In this paper, based on the steel structure installation of Gansu Convention and Exhibition Center, the numerical analysis and experimental study of the members during the installation process of large-span steel truss are carried out. The stress and displacement distribution of steel truss during construction is summarized, which ensures the safety of installation process, avoids excessive initial stress damage, and realizes on-line control installation process. The main research contents are as follows: 1) the application and development of large-span profiled steel structures are comprehensively reviewed, and the research status of monitoring and theoretical analysis of the construction process of space structures at home and abroad is reviewed. This paper summarizes the positive achievements and shortcomings of the previous research. 2) using the nonlinear analysis function of ANSYS, the three-dimensional finite element model of steel truss is established. Finally, the most reasonable lifting scheme of 8 hoisting points is optimized, and the stress and displacement distribution of steel truss is simulated and analyzed. It is used to control the initial stress damage of the construction. 3) the stress values of the two main steel truss members in the hoisting stage and the temporary fixing stage are measured in the upper chord, the web bar and the lower chord of the steel truss. The results are transmitted to the on-line control software (written by Bi Wenping) in real time to control the maximum stress of the members. 4) finally, By comparing and analyzing the results of numerical calculation and optimization before construction of steel truss and the field test results during construction, the stress distribution curves of steel truss members in hoisting and temporary fixing stages are obtained, and the stress distribution law is summarized. Suggestions for construction and design of similar steel truss in the future are put forward.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：TU392.1

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 樊敏;門式桁架的結(jié)構(gòu)設(shè)計及有限元仿真分析[D];西安電子科技大學(xué);2013年

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本文編號：2246417