Calculation of Creep and Shrinkage in Tall Concrete Buildings Using Nonlinear Staged Construction Analysis

This paper attempts to calculate column shortening and differential shortening betweencolumns and walls in concrete frames using a nonlinear staged construction analysis basedon the Dirichlet series and direct integration methods. Prototype frame structures areidealized as two-dimensional and the finite element method (FEM) is used to calculate thecreep and shrinkage strains. It is verified with respect to published experimental andanalytical results. B3 model and methods such as AAEM, EMM, IDM, and RCM are usedfor verification purposes.For each frame, effects of creep and shrinkage parameters such as relative humiditypercent, rate of construction, shrinkage parameter, and concrete strength have been takeninto consideration separately. The manner in which creep and shrinkage can influence the behavior of concrete structures also has been discussed.