| Title |
Evaluation of Progressive Collapse Resisting Capacity of Reinforced Concrete Beam-Column Sub-structures |
| Authors |
Choi Hyun-Hoon ; Park Kyoung-Hoon ; Jeon Yong ; Kim Jin-Koo |
| Keywords |
Progressive Collapse ; Beam-column Sub-assemblage ; Catenary Action ; Seismic Detail |
| Abstract |
In this study experiments were carried out to investigate the progressive collapse resisting capacity of RC beam-column subassemblages designed with and without seismic load. The two-span subassemblages were designed as part of an eight-story RC moment resisting frame. The right interior column was designed 1.5 times as large in size as the middle interior column to take into account the continuation of the girder. Monotonically increasing load was applied at the middle column of the specimens and the force-displacement relationships were plotted. It was observed that the non-seismic designed specimen failed by crushing of concrete at the exterior column-girder joint before catenary action was activated. However the force-displacement relationship of the specimen designed for seismic load kept increasing after fracture of the girder lower re-bars near the middle column due to the catenary action of the upper re-bars. Based on the test results it was concluded that RC moment-resisting buildings designed per current design code might have significant resisting capacity against progressive collapse initiated by sudden loss of a column. |