Vertical Deformation Analysis of Super Tall Buildings Considering Shrinkage and Creep Effects

ABSTRACT

A SAP2000 finite element model was established to simulate the effect of concrete shrinkage and creep on structural deformation of a supertall building C1 tower. According to the construction process, gradually activate the structural units of each construction step to simulate the construction process of supertall structures layer by layer; the results show that during the construction phase, the deformation caused by shrinkage and creep can account for about half of the total deformation. The deformation values calculated by different shrinkage and creep calculation modes vary during the construction phase. The calculation results of CEB‐FIP mode and ACI mode are very close, whereas the GL2000 model has a larger calculation value; in the use stage, vertical deformation is still developing, and the deformation value after 20 years of completion can reach twice that of the initial completion. The vertical deformation difference has increased by about 60%, and the main development period of vertical deformation of the structure is within 20 years of completion; the redistribution of internal forces caused by shrinkage and creep continuously reduces the axial force of the bottom frame column, but the reduction is small, with a maximum of only about 5.7%. The study's originality lies in integrating staged construction simulation with time‐dependent material behavior for a supertall structure and in providing engineering‐oriented comparisons of three international shrinkage–creep models, offering practical reference for deformation control and long‐term performance assessment.