| Title |
Shear Reinforcement of Flat Plate Exterior Slab-Column Connection |
| Authors |
Choi Hyun-Ki ; Beck Seong-Woo ; Choi Yun-Cheul ; Choi Chang-Sik |
| Keywords |
Flat Plate ; Punching Shear ; Shear Reinforcement ; Exterior Connection ; Curve Steel(CS-Bar/SS-Bar) |
| Abstract |
Flat plate slab has been widely used in high rise buildings for its remarkable advantages. However, punching shear failure has become increasingly important issue with the spread of flat plate slab. The intend of this research was to study the response of slab-column connections containing various types of shear reinforcement when subjected to combined gravity and cyclic lateral loading. The three test specimens were full-scale representations of exterior slab-column connections in a prototype Korea apartment building. The control specimen had no shear reinforcement, while the other specimens had CS-Bar(Curve steel) and SS-Bar(Curve steel) as shear reinforcement. The control specimen failed due to punching shear around the slab-column connection at 4.0% drift. The two types of slab shear reinforcement proved equally effective in resisting punching shear failure for these connections subjected to relatively low levels of gravity load. The presence of shear reinforcement significantly increased the lateral load ductility of the connection. The test results showed that the strength and ductility of the specimens with the SS-Bar/CS-Bar shear reinforcement were improved by 23% and 13% those of the none of the shear reinforcement specimens, respectively. |