多層長懸臂鋼結構施工過程模擬與監(jiān)測研究
[Abstract]:With the continuous development of building structure technology, many novel and peculiar architectural types have emerged in front of our eyes. The long cantilever steel structure studied in this paper belongs to one of them. In the construction of long cantilever structure, temporary support is often needed, and the structure system will be transformed during the demolition of temporary bracing. So in order to ensure the safety and feasibility of the long cantilever structure construction process and make the design value of the structure configuration can be satisfied, it is necessary to make numerical simulation and on-site monitoring of the construction process of the structure. In this paper, a long cantilever steel structure is taken as an object, which is mainly studied in the following three aspects: firstly, on the basis of comparing the different types of temporary bracing structure, a kind of temporary bracing structure with integral bent frame is designed. This kind of temporary support structure has the characteristics of high overall stiffness and stability, easy installation and construction. Through numerical simulation and analysis, the maximum position of internal force and deformation, instability mode and natural vibration period of temporary bracing structure are obtained, which ensures the safety and stability of the temporary bracing structure. Secondly, the whole construction process of the long cantilever steel structure is simulated and analyzed by using the finite element software Midas/Civil,. The construction process is divided into 16 sub-stages, and the position of maximum cross-section stress and vertical deflection in each stage is analyzed. Finally, site construction monitoring is carried out on the key position of the structure. By comparing the numerical simulation results with the field measured values, it is found that the two methods are in good agreement with each other, which shows that the numerical simulation method used in this paper is correct and feasible. The research results of this paper have certain reference value and guiding significance for the analysis and application of similar long cantilever structure construction process in the future.
【學位授予單位】:上海交通大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TU758.11
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