Study of the Influence of shrinkage, creep and temperature difference on super high-rise structural deformation

The indirect load factors that influence super high-rise structural deformation mainly include the shrinkage, creep of concrete, as well as the temperature difference between the sunny side and sunless side of a structure. And the direct load factors influencing the deformation of a structure include its dead weight, live load, wind load, etc. The analysis was carried out for the refined construction process simulation of a super high-rise structure in China Shenzhen with a height of 441.8m, and the research was done on the influence degree of non direct load factors on super high-rise structural deformation. Analysis result shows that: when level finding storey by storey is considered during construction stage simulation, the vertical displacement of the structure occurs in the middle storey of the structure, with max displacement of 58.4mm. Without considering the layer-by-layer leveling, the final max displacement occurs in the top storey of the structure, with max displacement of 103mm. After 600 days since structure completion, the max displacement is 122mm, and the structural deformation of each construction stage caused by shrinkage creep takes up about 30% of the total deformation. The structural lateral deformation caused by wind load is of shearing type, while the lateral deformation caused by temperature difference is bending deformation. Thusly, the proportions of deformation caused by temperature difference and wind load are becoming greater and greater with the increase of height. Under the influence of wind load which might occur once in 50 years, the displacement at the top of structure can reach 1752mm, and lateral displacement at the top of structure can reach 701mm when temperature difference is 30℃, accounting for 40% of the deformation caused by wind load.