To investigate the seismic performance of unbonded fabricated frame
a numerical model of the beam-column connection was built in OpenSEES. The comparison between test results and numerical analysis proved the effectiveness of the numerical model. Eighteen different ground motions were employed in the seismic fragility analysis according to the site conditions. The maximum story drift and tensile force in prestress strands were chosen as the damage indexes. Through IDA analysis for two 6-story frame structures
i.e. the common RC frame and unbonded fabricated frame
the IDA curves and fragility curves were obtained. According to the analysis
the unbonded fabricated frame can sustain ground motion record with smaller intensity index than the common RC frame with the same configurations
i.e. the cross-section of column
reinforcement ratio etc. Under small earthquake
the two frame structures present similar performance
while under strong earthquake
the collapse resistance performance of common RC frame is better than that of the unbounded fabricated frame.