即時複合實驗技術應用於鋼筋混凝土門型構架之實驗研究

Shaking table test (STT) is one of the well-known experimental methods to validate the seismic performance of the structures. However, an STT for a fullscale RC building may not be feasible due to the limitation of specimen cost and test equipment capacity. To solve this problem, the method of real-time hybrid testing (RTHT) may be utilized. The concept of RTHT is to divide a structural system into a primary structure whose dynamic responses is simulated by a numerical model, and a substructure that is physical tested with an actuator system. Therefore, the demands on specimen cost and the equipment capacity of the RTHT for a full-scale RC building will be much less than those of an STT. However, the application of RTHT for reinforced concrete (RC) structures is very rare due to the complex mechanical properties of RC structures. RC structures usually have a very high initial stiffness and significant degradation on stiffness and strength under a large deformation, which may make the actuators in RTHT difficult to be controlled as desired. To investigate this problem, a RC portal frame is utilized to verify the reliability of the RTHT for a full-scale RC building in this study. The comparison between the RTHT and theoretical results shows that the dynamic responses of the RC building subjected to seismic excitations can be experimentally simulated by the RTHT and the control performance of the actuator can be improved by the compensation method employed in this study.