| Title |
Cyclic Loading Test for Slab-column Connection Reinforced with Lattice Bars |
| Authors |
Kim, You-ni ; Kang, Su-Min ; Park, Hong-Gun |
| Keywords |
Slab-column Connection ; Lattice ; Shear Reinforcement ; Ductility ; Earthquake Design |
| Abstract |
An experimental study was performed to investigate the unbalanced moment?carrying capacity of slab?column connections reinforced with lattice reinforcement. In the lattice reinforcement, top and bottom longitudinal bars are weld-connected with web bars. The web bars are used as shear reinforcement. The top and bottom bars provide flexural resistance and the anchorage for the web bars. In this test, six specimens of slab-column connection including a shear-unreinforced specimen were tested under cyclic loading, maintaining a direct punching shear force. The test parameters were the length of the lattice bars and the shape of the layout. For the layout, cruciform, combined cruciform and corner reinforcement, and parallel layouts were used. The length of the lattice bars from the column face was 3.0 ~ 8.0 times the slab depth. According to the test results, the lattice reinforcement improved the load-carrying capacity and deformation capacity of the slab-column connection. However, the effect of the lattice reinforcement significantly varied with the length and the layout of the lattice-reinforcement. The combined cruciform and corner reinforcement layout showed the best performance even with a short length, 3.0 times the slab depth. The contributions of the lattice reinforcement to the flexural moment capacity and the eccentric shear capacity were discussed. |