Construction Simulation Analysis And Wind Induced Vibration Respnose Research Of Super High-rise Frame-core Wall Hybrid Structure

During the construction process, super high-rise buildings are formed from basement to top,as well as load effect is applied to the construction process with stages. In the construction stage, structural components and systems as well as deformation and internal force change unceasingly, because of construction operation, dead load, construction load and construction equipment load and the influence of concrete material degeneration. At the same time, the influence of construction external environment, with the construction process the internal force and deformation of structure will change. In order to ensure the safety, the accuracy of the construction during the construction process and the rational mechanical behavior of structure after the completion, it is necessary to make comprehensive analysis on a variety of elements which have the influence on the structure deformation and internal force distribution. And according to the construction scheme, make the construction monitoring scheme, to track and analysis the construction process, combined with the field measurement data to determine the structure in various stages of construction and the various environmental conditions of deformation and rules of internal force distribution, and to provide scientific basis for construction control and the specific numerical targets, to conduct the whole construction process and control the super high-rise structure construction process. Based on this, the main work and research include the following aspects:(1) Based on the analysis of construction stage of degeneration. First of all, by considering the collaborative effect of steel and concrete, it is corrected the parameters in the formula of CEB-FIP model for calculating the creep of concrete filled steel tubular columns. On this basis, using the element birth and death method, and considering the factors of load factors and non-load factors, accurate simulation of the construction process of JiuZhou International 318 m high-rise frame-core tube structure.(2) Structural deformation and internal force distribution analysis. On the basis of accurate finite element to simulate the construction process of the model calculation results, analysis of the differences between the different vertical structure system deformation and its effect on the internal force are made. And through the comparison of different construction methods, the construction scheme is optimized. Aimed at the differences of vertical deformation between the frame and core tube, it is adopted to improve the construction elevation by way of compensation.(3) The construction process monitoring of super high-rise structure. Based on finite element analysis of construction simulation, it is made the construction monitoring scheme of super high-rise structure, vertical deformation of construction stages, shrinkage and creep of concrete and dynamic characteristics of field monitoring. The modal parameter identification of different construction stages by using stochastic subspace identification, and through the response surface method based on the measured data of the finite element models are modified.(4) The wind vibration response analysis of high-rise structure construction stage. Lateral load of high-rise structure plays a decisive role in the structural design. In addition to the earthquake effect, the lateral load of structure is wind load. On the basis of pulsating wind power spectrum by using different linear filtering, artificial life wind load time history of wind vibration, when considering the degeneration of the time history analysis, obtained the law of wind vibration response of super high-rise building structure construction stage, provides the theory basis for wind resistant measures.