大跨度复杂空间钢结构施工全过程受力分析与监测
发布时间：2018-09-02 09:48
【摘要】：改革开放以来,我国的经济有了飞速的发展,各种新型结构不断创造出来且得到了很好的发展,并已经运用到各个领域,其中大跨度空间钢结构是发展应用最快的结构形式之一,如国家大剧院、国家游泳中心等标志性建筑。现价段对于大跨度空间钢结构的前期结构设计,就是单纯的对结构建造完成后的整体进行计算,对结构在施工过程中可能出现的一些不确定性因素考虑不多,这也是现在大跨复杂结构在施工过程中事故高发生率的主要原因之一。大跨度复杂结构由于造型很复杂、施工周期跨度较大,施工过程中各种不确定性因素可能引起结构内力和应力以及位移变化的影响很难估计,所以对大跨度空间钢结构的施工全过程进行数值模拟分析和监测,是非常有必要的。这样可以预测和跟踪结构在施工过程中的内力和应力及位移变化,保证结构的安全性和与设计的尽量一致性。主要从以下方面作了分析研究:1、介绍了大跨度空间钢结构的发展以及国内外的现状,并对复杂空间钢结构的优缺点进行介绍,然后介绍了本文的主要研究内容;2、分析介绍了空间钢结构的几种安装施工方法,简单介绍了每一种安装施工方法的优缺点,并对这几种安装方法进行了比较分析。然后结合庐江体育馆的工程状况,确定了适用于本工程的安装方法;3、介绍了施工过程分析理论与常用的几种数值分析方法,然后介绍了软件MIDAS/Gen的模拟分析原理,并对庐江县体育馆钢结构桁架安装施工的全过程进行了数值模拟;4、运用MIDAS/Gen软件对整体在自重作用下进行分析,选取最有代表性的第五榀桁架、第六榀桁架和第七榀桁架为一个单元进行全过程施工模拟分析,研究几个有代表性的测点的内力、应力和位移的变化,得出都在规范值之内,说明上述确定的安装方案是可行的;5、对实测应力应变及位移数据进行整理,然后与模拟分析结果作比较分析,得出结构施工全过程数值模拟的准确性与结构的安全性,并分析了两者存在的差别原因,为以后此类结构的研究提供了一定的参考。综上,本文对大跨度复杂空间钢结构施工全过程模拟分析与监测可以为以后同类结构的研究提供很好的参考。图:68表:5参:54
[Abstract]:Since the reform and opening up, the economy of our country has developed rapidly, various new structures have been created constantly and have been developed very well, and have been applied to various fields. Among them, large span spatial steel structure is one of the fastest applied structural forms, such as National Grand Theater, National Swimming Center and other landmarks. The present price section is a simple calculation of the whole structure after the completion of the construction of the large-span spatial steel structure, and some uncertain factors that may appear in the construction process are not considered much. This is also one of the main reasons for the high incidence of accidents in the construction of large span complex structures. Due to the complexity of modeling and the long span of construction period, it is difficult to estimate the influence of various uncertain factors during construction on the variation of internal force, stress and displacement of long-span complex structures. So it is necessary to simulate and monitor the whole construction process of long span space steel structure. In this way, the internal force, stress and displacement of the structure in the construction process can be predicted and tracked, and the safety of the structure and the consistency with the design as far as possible can be ensured. This paper analyzes and studies the following aspects: 1, introduces the development of large-span spatial steel structures and the present situation at home and abroad, and introduces the advantages and disadvantages of complex spatial steel structures. Then it introduces the main research content of this paper, analyzes and introduces several installation and construction methods of spatial steel structure, briefly introduces the advantages and disadvantages of each installation construction method, and makes a comparative analysis of these installation methods. Then according to the engineering situation of Lujiang Gymnasium, the installation method is determined, the theory of construction process analysis and several common numerical analysis methods are introduced, and the simulation and analysis principle of software MIDAS/Gen is introduced. The whole process of steel truss installation and construction in Lujiang Gymnasium is numerically simulated. The fifth truss, which is the most representative truss, is analyzed by using MIDAS/Gen software under the action of self-weight. The sixth truss and the seventh truss are used as a unit to simulate the whole process of construction. The variation of internal force, stress and displacement of several representative measuring points is studied. The above determined installation scheme is feasible. The measured data of stress, strain and displacement are sorted out, then compared with the results of simulation analysis, the accuracy of numerical simulation and the safety of the structure during the whole process of construction are obtained. The reason of the difference between them is analyzed, which provides a reference for the study of this kind of structure in the future. In summary, this paper can provide a good reference for the research of similar structures in the future. Fig. 68 Table 5 refs: 54
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU758.11
本文编号：2218991
[Abstract]:Since the reform and opening up, the economy of our country has developed rapidly, various new structures have been created constantly and have been developed very well, and have been applied to various fields. Among them, large span spatial steel structure is one of the fastest applied structural forms, such as National Grand Theater, National Swimming Center and other landmarks. The present price section is a simple calculation of the whole structure after the completion of the construction of the large-span spatial steel structure, and some uncertain factors that may appear in the construction process are not considered much. This is also one of the main reasons for the high incidence of accidents in the construction of large span complex structures. Due to the complexity of modeling and the long span of construction period, it is difficult to estimate the influence of various uncertain factors during construction on the variation of internal force, stress and displacement of long-span complex structures. So it is necessary to simulate and monitor the whole construction process of long span space steel structure. In this way, the internal force, stress and displacement of the structure in the construction process can be predicted and tracked, and the safety of the structure and the consistency with the design as far as possible can be ensured. This paper analyzes and studies the following aspects: 1, introduces the development of large-span spatial steel structures and the present situation at home and abroad, and introduces the advantages and disadvantages of complex spatial steel structures. Then it introduces the main research content of this paper, analyzes and introduces several installation and construction methods of spatial steel structure, briefly introduces the advantages and disadvantages of each installation construction method, and makes a comparative analysis of these installation methods. Then according to the engineering situation of Lujiang Gymnasium, the installation method is determined, the theory of construction process analysis and several common numerical analysis methods are introduced, and the simulation and analysis principle of software MIDAS/Gen is introduced. The whole process of steel truss installation and construction in Lujiang Gymnasium is numerically simulated. The fifth truss, which is the most representative truss, is analyzed by using MIDAS/Gen software under the action of self-weight. The sixth truss and the seventh truss are used as a unit to simulate the whole process of construction. The variation of internal force, stress and displacement of several representative measuring points is studied. The above determined installation scheme is feasible. The measured data of stress, strain and displacement are sorted out, then compared with the results of simulation analysis, the accuracy of numerical simulation and the safety of the structure during the whole process of construction are obtained. The reason of the difference between them is analyzed, which provides a reference for the study of this kind of structure in the future. In summary, this paper can provide a good reference for the research of similar structures in the future. Fig. 68 Table 5 refs: 54
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU758.11
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