本文關鍵詞：巨型框架—核心筒—環(huán)形伸臂桁架超高層結構施工過程模擬分析　出處：《河北工業(yè)大學》2015年碩士論文　論文類型：學位論文

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【摘要】：由于我國經濟和技術的不斷發(fā)展,超高層建筑的使用日益廣泛。在超高層建筑結構當中,巨型框架-核心筒-環(huán)形伸臂桁架結構體系的運用開始普遍,成為現代超高層建筑中使用較多的結構之一。通常超高層結構的研究主要集中于結構自身的力學特性和設計方法,對于結構的施工過程研究相對較少。但是,由于超高層建筑的結構體型復雜、施工周期長、施工質量要求較高,超高層結構的施工過程模擬日益受到重視,并且日趨勢在必行。本文以天津市諾德英藍國際金融中心項目為背景,運用SAP2000有限元分析軟件對結構進行施工過程模擬分析,通過對比不同因素對結構施工過程模擬結果的影響,分析施工過程中需要注意的問題,為超高層巨型框架-核心筒-環(huán)形伸臂桁架結構的施工提供有益的參考,本文主要進行了以下幾項工作:1.對巨型框架-核心筒-環(huán)形伸臂桁架的整體結構,運用SAP2000有限元分析軟件進行有限元模型的建立,并對施工過程分析模型的建立方式和過程進行了敘述,形成了較為完整的施工過程模擬建模方案。通過與施工監(jiān)測數據的對比,驗證施工過程模擬分析模型的正確性,并分析誤差產生的原因。2.對施工過程模擬分析的加載方式進行理論分析。運用有限元模型對巨型框架-核心筒-環(huán)形伸臂桁架結構進行不同加載方式的施工過程模擬,通過對比不同加載方式對結構豎向位移、豎向位移差以及核心筒豎向應力的影響,分析不同加載方式的對結構施工過程的影響。結論表明,精確施工過程加載法更接近實際情況,在施工過程模擬時應采用精確施工過程加載法。3.從理論上分析筒體領先施工的必要性,分析現有筒體領先施工層數的計算方法。運用施工過程模擬不同筒體領先層數,通過對比結構的豎向位移和豎向應力的不同變化,分析得出筒體領先施工可以有效的減小不同結構的豎向位移差。對于64層的超高層結構,領先施工8-12層較為合理。4.通過改變桁架連接順序、對比結構豎向位移,研究施工中較為合理的桁架連接順序;研究塔吊設備對結構豎向位移的影響。結果表明,對于桁架結構最后連接,桁架結構在施工過程中連接可以協調結構的豎向位移,但會對桁架結構產生較大的次生力,需要注意施工過程中桁架結構的受力問題;塔吊設備對結構的豎向位移影響不大,可以在施工過程模擬中進行簡化計算。5.通過理論分析收縮和徐變系數的計算方法及其對結構的影響,并在施工過程模擬計算中分別考慮收縮和徐變的影響。通過對比結構豎向位移和豎向應力,得到結論:在施工過程模擬分析中,收縮和徐變對巨型框架-核心筒-環(huán)形伸臂桁架結構的豎向位移和豎向位移差影響較大,所以在進行施工過程模擬時不應忽略其影響,并應在施工過程中充分考慮和減弱收縮徐變帶來的影響。
[Abstract]:Due to the continuous development of China's economy and technology, the use of super high-rise building is more and more widely. In super high-rise buildings, the use of mega frame core tube - ring cantilever truss structure system to become one of the more common use of modern structure in high-rise buildings. The mechanical properties and design method through study of Chang Chao mainly focused on high-rise structure the structure of its own, for the study of the construction process is relatively small. However, due to the high-rise building complex, long construction period, the construction of high quality, simulation is paid more and more attention to the construction process of the high-rise structure, and on the trend in the imperative. Based on the background of Tianjin city Nord Winland international financial center project. Simulation analysis of construction process of structure using finite element analysis software SAP2000, the simulation results of the construction process through the comparison of different factors Impact analysis of the need to pay attention to in the construction process, provide a useful reference for the construction of super high-rise mega frame core tube - ring cantilever truss structure, this paper carried out the following work: 1. of the mega frame corewall outrigger truss ring structure, transport finite element model is established by using SAP2000 finite element the analysis software, and the construction process analysis model and process are described, forming a more complete modeling scheme to simulate the construction process. By comparing with the construction monitoring data, the correctness of the analytical model simulation of construction process, and analyzes the causes of the error of.2. to analyze the construction process simulation analysis loading. By using the finite element model to simulate the construction process of different loading modes on the mega frame core tube - ring cantilever truss structure, through the comparison of different The displacement of loading on the structure of the vertical stress, vertical displacement and vertical tube, analysis of different loading methods on the structure of the construction process. The conclusion shows that the effect of the construction process, accurate loading method is closer to the actual situation in the construction process, construction process simulation should be used when the exact loading method of.3. analysis of the necessity of leading tube construction from the theoretical analysis, the existing calculation methods of cylinder leading construction layers. With the construction process simulation of different cylinder leading layers, different changes through the vertical displacement and vertical comparison of structure stress analysis, the tube leading construction can effectively reduce the vertical displacement of different structures. For the 64 storey high-rise structure 8-12, the leading construction layer is more reasonable by changing the order of.4. truss, vertical comparison of the displacement of structure, reasonable construction sequence of truss crane design; research Effect of vertical displacement of the structure. The results show that for the last connected truss, truss structure can connect vertical displacement coordination structure in the construction process, but will be larger Miguel truss structure, the truss structure construction process need to pay attention to the stress problem of small crane; vertical displacement structure.5., can simplify the calculation method of shrinkage and creep coefficient is analyzed by theory and its influence on the structure in the construction process simulation, and in the construction process simulation calculation of shrinkage and creep are considered. The influence of vertical displacement and vertical comparison of structure stress, get the conclusion: in the analysis of construction process simulation, shrinkage and creep to the mega frame core tube and the annular cantilever truss structure of vertical displacement and vertical displacement difference influence, so in the construction process simulation should not be ignored The effect of shrinkage and creep should be fully considered and weakened during the construction process.

【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU974

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