The Situ Measurement Research Of Vertical Deformation For The Super-Tall Steel Structures With Concentrically Braced During Construction Period

Since twentieth Century, with the continuous progress of science and technology, the construction industry has also changed dramatically. The structure of the building is gradually showing the trend of the development of super high, super large, complex structure and so on. The increase in building height also brings some new problems. Before the middle of the last century, the building structure system is relatively simple, and the architectural modeling is normal, and the stress in the structure is uniformly distributed, so the vertical structure deformation effect on the overall performance of the structure are usually not considered. But since the sixties of last century, along with the continuous development and improvement of the high-rise and super high-rise building technology, increasing the height of the building structure, building structure of vertical deformation and deformation difference increases, the resulting structure residual should force, floor cracking are also increasing, the vertical deformation of structure has become a problem faced by the super high-rise buildings and can't be ignored.Steel frame structure with center support is a kind of structure forms in the process of the development of super high-rise building. Under the combined effect of the weight of the structure and other loads, the structure must exist significant difference vertical deformation caused by the different of axial stress and the creep and shrinkage of concrete and the different construction of every structure. At present, although there are many researches on the vertical deformation of super high-rise structures in China, the research on the steel frame center support structure system is relatively few. Therefore, this paper relies on the project of Xi'an MEIKO business center, use the combination of testing and theoretical analysis to expand the research. The main contents of this paper are as follows:Firstly in this paper, through reading related literature, familiar with the domestic high-rise building structures under vertical deformation research status, by summarizing the analysis results of previous studies, master the super highrise steel frame structure with center support during construction deformation related to the basic theory, that to make a good theoretical basis for the following study.Secondly, in the course of the study, this paper made a reasonable test plan to test the vertical deformation of the super high-rise steel frame structure with center support during the whole construction process. Through the processing and analysis of the field measured data, the development law of the deformation of the structure during the construction period is summarized.At the end of this paper, using finite element analysis software SAP2000 to establish a reasonable analysis of super high-rise steel frame structure with center support during construction period under vertical force deformation model. And simulate each construction stage of the structure. Compare the simulation and the test results, then get the development process of the structure in the construction process of vertical deformation difference. At last give some actual guiding sense and the practical and feasible suggestions.