| Title |
Experimental Study on the Structural Behavior of Post-tensioned Outrigger Members using High-strength Concrete |
| Authors |
Chung Kyung-Soo ; Choi Jong-Moon ; Kim Dae-Keun ; Moon Jeong-Ho |
| Keywords |
Outrigger Members ; Post-tensioning ; High-strength Concrete ; Deep Beam |
| Abstract |
Large outrigger elements tie the concrete core to perimeter columns, significantly increasing the building's lateral stiffness as well as its resistance to overturning due to wind. The outriggers role to deep beam elements in a building, and large tie forces are resisted by heavy longitudinal reinforcing and vertical ties in top and bottom of those. High-strength concretes have been specified for outrigger elements. However, the reductions in the amount of concrete and reinforcement steel are the most important issue in tall building. Under these backgrounds, this study is conducted to develop outrigger members composed to prestressed high-strength concrete. Four 1/4-scale test specimens are selected from the same prototype structure. The size of the test specimens are length 5.6m and depth 1.2m. The structural performance are evaluated under cyclic loading. The results from the tests are confirmed that the developed outrigger members have better structural performances with regard to initial stiffness, small residual plastic deformation and energy absorption. The results of the numerical analysis using fiber cross sections show a similar trend to the experimental results. |