| Title |
Cyclic Loading Tests of Exterior Composite Beam-to-Column Connections Using Thin Steel Plates |
| Authors |
Lim, Jong-Jin ; Kim, Dong-Kwan ; Lee, Sang-Hyun ; Eom, Tae-Sung |
| DOI |
https://doi.org/10.5659/JAIK_SC.2017.33.8.11 |
| Keywords |
Moment connection ; Concrete filled tube ; Cyclic test ; Composite moment frame ; Composite structure |
| Abstract |
In the present study, exterior composite beam-to-column connections using thin steel plates were tested under cyclic loading. Octagonal steel tubes and U-section steel beams with a thickness of 6 mm were used for the composite column and beam, respectively. To transfer the tension force of beam flanges to column effectively, a hybrid moment connection using U-bars was developed. The through reinforcement bars were anchored to the concrete infill of column and beam, respectively. Note that, the beam flanges were not welded to the column face to release the stress concentration at the weld joint. Also, cyclic behaviors of hybrid moment connections were compared to the conventional welded moment connection with external diaphragm. The test results showed that the conventional welded moment connection successfully transferred the beam moment to the column. However, in the case of the hybrid moment connection, the strength and ductility were inferior to those of the conventional welded moment connection, with weld joint fracture and out-of-plane deformation of steel tube of column. On the basis of that observations, reasons for the inferior performance of the hybrid moment connection were discussed. |