| Title |
Effects of Differential Column Shortening on Internal Member Forces of Tall Buildings |
| Authors |
Kim Han-Soo ; Shin Seung-Hak |
| Keywords |
Column Shortening ; Construction Sequence ; Long-term Behavior ; Crack ; Internal Force ; Tall Building |
| Abstract |
In this study, four analysis methods are compared to evaluate the effect of the differential column shortenings on the internal member forces of tall buildings. The four analysis methods successively include the effect of construction sequence, long-term behavior of concrete and cracking. Column shortenings of 80-story reinforced concrete frame were investigated as a numerical example. The differential column shortening, the bending moments at the end of the horizontal members and the axial forces of the columns are compared. Construction sequence should be included for the shortening as well as the internal forces. Long-term behavior of concrete is mandatory for the deformation but it is optional for the internal forces. Inclusion of cracking should be determined with caution because it yields much lower internal forces which do not agree with the current design code. |