| Title |
Stiffness of Column-Slab Connection in Flat Plate System Using High Strength Concrete |
| Authors |
Kim Hyong-Kee ; You Jei-Jun |
| Keywords |
Flat Plate System ; Column-Slab Connection ; High Strength Concrete ; Lateral Stiffness ; Finite Element Analysis |
| Abstract |
In this study, the author's test results of column-slab connection in flat plate system using high strength concrete were analyzed in order to evaluate its stiffness. The test results were compared with the predictions of elastic finite element analysis,??the ACI equivalent frame method and the AIJ method. The followings were found: 1) At the level of working gravity load, the gravity stiffness was about 70 percent of initial stiffness. 2) The lateral stiffness of column-slab connection decreased with increasing the lateral deflection and was dependent on the level of slab gravity load and slab reinforcement percentage.?? 3) The initial lateral stiffness was about 50 percent of elastic finite element analysis in lateral drift ratio of 0.0625 percent. This was attributed to the accelerated slab cracking around the connection as a result of the increased gravity load moments.??4) The lateral stiffness varied from 24 to 37 percent of elastic finite element analysis and from 17 to 26 percent of ACI equivalent frame method in lateral drift ratio of 0.2 percent. This result gave agreement with other researcher's test result of column-slab connection using normal strength concrete. |