Construction Simulation And Long-Term Effects Of Construction Schemes Of Super High-Rise Building

In recent years, the world has emerged a large number of high-rise buildings. With the height of buildings increasing, the structural design and construction are faced with new challenges. It can be found that, the stiffness, bearing load, boundary of structure, the shrinkage and creep deformation of concrete are constantly changing during the construction process. These factors will cause the internal force of structure change, and partial stress may even become the control factors of structure design. In addition, the influence of different construction strategies to the structure isn't the same. It should pay attention to the long-term effect of the initial deformation and stress, which is caused by the construction. This topic takes shenzhen Kingkey 100 plaza as engineering background. It mainly includes the entire construction simulation analysis and optimization, long-term effect of construction schemes and analysis of pouring height of concrete filled steel tubular, specific as follows:Do research on the construction simulation analysis of high-rise buildings. Establish construction simulation analysis model, which considers the shrinkage and creep effect of concrete, and the construction leveling measures. It carries on the construction simulation analysis, to explore the variation characteristics of interal force and deformation of the structure duiring the construction process. Then it gives the development law of interal force and deformation along with the construction process, and the distribution characteristics of vertical deformation along with the height of the structure. The calculated datas are compared with measured datas, and the results are consistent with each other. That is to say, the construction simulation method is effective.With the construction conditions, do optimization on the construction advance layer of core tube and outside frame, and the bonding time of outrigger truss. The paper has make clear the influence of different construction schemes to the deformation difference and the interal force of outrigger truss. On the base of construction simulation analysis, it carryies on the long-term creep analysis, wind-induced vibration and seismic response analysis, to discuss the long-term influence of different construction to structural properties. The results show that, under differential construciton schemes, the wind resistance performances are almost the same, but the initial interal force and deformation is different. The adverse scheme will make partial component become plastic, and weaken the seismic resistant performance. The hollow steel tubes are subjected to lateral hydrostatic loads as concrete has flowing properties during the construction of concrete filled steel tubular (CFST). It may cause stress concentration on steel tube. The problem may be more serious as the pouring height increase, and it may cause hidden danger under long-term effects. This paper will simulate the pouring process of CFST to investigate the influence to the properties of steel tube under various pouring height. Meanwhile, it also discusses the further influence to the steel tube under initial pouring stress. The results show that, when the pouring height is incresed, the long-term effects is more obvious. In the end the monitoring data has be used to check its reliability.