某音乐厅屋盖巨型钢桁架结构施工模拟与监测

发布时间：2018-09-03 08:24

【摘要】：大跨空间结构具有外形美观、受力合理、跨越能力强、重量轻、造价低等优点,近年来在体育场馆、影剧院、会展中心、航站楼等建筑中得到广泛应用。由于大跨空间结构规模大且形式复杂,施工周期长,结构在施工期间发生事故的概率较大。因此,大跨空间结构施工全过程模拟分析与施工监测受到越来越多的关注。本文将针对某音乐厅施工期间的力学性能展开模拟分析与现场监测,主要研究内容如下:(1)总结分析施工力学分析的方法及各自特点,确定用于本文的分析方法。采用SAP2000通用有限元分析程序,考虑结构的非线性、材料非线性以及边界的非线性,对某音乐厅该典型工程在施工过程中的力学性能进行分析,获得关键位置的变形,并确定临时支撑卸载方案。研究表明,一般单元法比时变单元法和拓扑变化法适合用于结构施工全过程分析;制定的多点同步卸载方案,经过对结构关键构件在卸载过程中竖向位移和水平位移的分析,证明具有良好的可行性。(2)在简要介绍大跨空间结构施工监测内容、方法和系统的基础上,基于施工过程的模拟结果,制定某音乐厅的施工监测方案,重点监测临时支撑卸载过程中结构关键位置变形的发展,同时与施工过程模拟结果进行对比;另外,监测卸载过程中支承反力的变化情况。研究表明,临时支撑卸载过程中结构周围关键测点的位移均匀缓慢变化,结构处于稳定状态;施工过程监测结果与模拟分析结果比较接近,发展规律一致;卸载后支撑处的反力均降低为零,达到了预期的施工效果。(3)针对某音乐厅对结构变形的控制要求,对主体结构完工后结构在玻璃幕墙等安装过程中关键构件的内力、变形进行监测,并进行模拟分析。研究表明,后续施工对屋盖关键构件的应力影响不大,并且应力监测结果得到了有限元结果的验证;玻璃幕墙等附属部分的施工没有对主体结构产生明显扰动,监测得到的结构主桁架、次桁架的变形虽略微增长,但均处于稳定状态。
[Abstract]:Long-span space structure has the advantages of beautiful appearance, reasonable force, strong span ability, light weight, low cost and so on. In recent years, it has been widely used in stadiums, theatres, exhibition centers, terminal buildings and so on. Because of the large scale and complicated form and the long construction period, the large span spatial structure has a high probability of accidents during construction. Therefore, more and more attention has been paid to the whole process simulation analysis and construction monitoring of long span space structure. The main contents of this paper are as follows: (1) summarize and analyze the methods and characteristics of construction mechanics analysis and determine the analytical methods used in this paper. By using SAP2000 general finite element analysis program, considering the nonlinearity of structure, material nonlinearity and boundary nonlinearity, the mechanical properties of this typical project in a concert hall during construction are analyzed, and the deformation of the key position is obtained. And determine the temporary support and unloading program. The results show that the general element method is more suitable than the time-varying element method and the topology change method for the analysis of the whole process of structure construction, and the multi-point synchronous unloading scheme has been developed through the analysis of the vertical displacement and horizontal displacement of the key members of the structure during the unloading process. It is proved that it has good feasibility. (2) based on the brief introduction of the monitoring contents, methods and systems of the construction of large span space structure, and based on the simulation results of the construction process, the construction monitoring scheme of a concert hall is formulated. Emphasis is placed on monitoring the development of the deformation at the key position of the structure during the unloading process of temporary support, and comparing the results with the simulation results of the construction process; in addition, the change of the supporting reaction force during the unloading process is monitored. The research shows that the displacement of the key measuring points around the structure changes slowly and evenly during the temporary support unloading process, and the structure is in a stable state, the monitoring results of the construction process are close to the results of the simulation analysis, and the development law is consistent. The reaction force of the support after unloading is reduced to zero, which achieves the expected construction effect. (3) according to the control requirements of the structure deformation in a concert hall, the internal force of the key components of the main structure during the installation process such as glass curtain wall after the completion of the main structure is analyzed. Deformation is monitored and simulated. The results show that the following construction has little effect on the stress of the key components of the roof, and the stress monitoring results are verified by the finite element results, and the construction of the subsidiary parts such as glass curtain wall has no obvious disturbance to the main structure. The deformation of the main truss and the secondary truss is stable, although the deformation of the secondary truss is slightly increased.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU758.11

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