| Title |
Behavior and Response Modification Factor of Reinforced Concrete Moment Frames under Cyclic Loading |
| Authors |
Lee Swoo-Heon ; Shin Kyung-Jae ; Kim Dong-Baek ; Lee Hee-Du |
| Keywords |
Energy Dissipation ; Ductility Ratio ; Response Modification Factor ; Plastic Rotation ; Reinforced Concrete Moment Frame ; Cyclic Loading |
| Abstract |
The average number of earthquake activities per year around the peninsula is about fifty times during the last five years according to the Korea Meteorological Administration. Nevertheless, the damage caused by the earthquake was not serious because the earthquake magnitude was not severe. It is required to make provision for old structural system with non-seismical detail at this time while the incidence of earthquake is gradually increasing. There are more than 80% school buildings of the reinforced concrete moment frame constructed before considering seismic design code in Korea. In this study, three RC frames designed only for gravity loads, including a frame simulated for non-seismical school building, were prepared based on KBC 2009: one ordinary moment frame (OMF) and two intermediate moment frames (IMFs). One of IMFs was strengthened with carbon fiber reinforced polymer (CFRP) at the base of column. A total of three frames were tested under cyclic loading according to ACI374.1-05. As a result, the CFRP increases the load-carrying capacity, ductility ratio and energy dissipation ratio but the strength and response modification factor were not increased as expected. Additionally, the plastic rotation of three models significantly exceeded the criteria of FEMA 356. |