| Title |
Structural Assessment of SRC Column-RC Beam Connection for the Underground Structure |
| Authors |
Ju Young-Kyu ; Chun Sung-Chul |
| Keywords |
Top-Down Construction Method ; SRC Column-RC Beam Connection ; Composite structure |
| Abstract |
SRC column-RC beam joint is frequently used for the Top-Down construction of underground structure. Various types of the SRC column-RC beam joint detail have been proposed and implemented for the anchorage of the reinforcing bars. The types can be classified by anchoring methods as follows: (1) passing through type; (2) wing plate type; and (3) H-beam bracket type. Although these types are widely being used in Korea, the structural performance is not clearly understood.
For each type of joint, the structural characteristics such as strength, stiffness, energy dissipation capacity, stiffness degradation, and ductility under monotonic and cyclic loads were tested. The test results showed that the passing through type had the best structural performance.
By improving the passing through type, the pseudo wide beam type specimens were experimentally investigated for the field application. It uses a number of reinforcing bars that are placed at the edge of the slab not to intersect a steel column without changing its sectional shape. It is concluded that the pseudo wide beam is adequate in the SRC column-RC beam joint not only for its structural capacities but also for its economic merits. |