| Title |
Seismic Performance Evaluation of Composite PC Columns with Interface Roughness |
| Authors |
이상섭(Lee, Sangsup) ; 오근영(Oh, Keunyeong) ; 박금성(Park, Keumsung) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.6.323 |
| Keywords |
Composite PC Column; Interface Roughness; Cyclic Loading Test; Shear Transfer; Seismic Performance |
| Abstract |
This study investigates the effect of interface roughness between the shell and core concrete on the cyclic behavior and seismic performance
of composite precast concrete (PC) columns. Two specimens with identical cross-sectional dimensions and reinforcement details were
fabricated, differing only in the surface condition of the inner shell: a smooth interface (HPCC-S) and a roughened interface (HPCC-R).
Cyclic lateral loading tests were conducted under constant axial load using a displacement-controlled protocol in accordance with ACI
374.1-05. The roughened specimen exhibited higher initial stiffness and maximum strength, along with improved deformation capacity and
cumulative energy dissipation. In contrast, the smooth-interface specimen showed concentrated damage in the shell concrete and experienced
premature termination due to rapid crack propagation. Evaluation based on ACI 374.1-05 indicated that the roughened specimen satisfied the
required performance criteria, whereas the smooth specimen did not. These results suggest that increasing interface roughness enhances shear
transfer across the shell?core boundary and contributes to stable composite action and improved seismic performance under cyclic loading. |