| Title |
Optimum Distribution of Reinforcement to Reduce Differential Column Shortening |
| Authors |
Kim Han-Soo ; Shin Seung-Hak |
| Keywords |
Column Shortening ; Construction Sequence ; Long-term Behavior ; Tall Building ; Reinforcement |
| Abstract |
A method to reduce the differential column shortening in reinforced concrete tall buildings by placing additional reinforcement was proposed and investigated on its efficiency. To reduce the differential shortening at a specific story, the axial stiffness of the columns which are part of the column line having larger shortening and are located below the specific story should be increased. The axial stiffness can be increased by placing additional reinforcement on the columns. The amount of reduction in column shortening for three analysis models according to five reinforcement distribution schemes were examined to find out the most effective reinforcement distribution method. As a result, it was proved that the effect of additional reinforcement on column shortening reduction was dependent on 3 factors. Also distributing the additional reinforcement according to the identical steel ratio was the most effective one among the five schemes. These results lead us to the conclusion that the differential column shortening can be reduced in design stage by placing the additional reinforcement to the columns. |