Fundamental tests of reinforced concrete columns subjected to seismic loading

Past experimental research studies on the strength and ductility capacity of structures showed that the ductility capacity is strongly affected by loading condition. For repeated loading such as earthquake motion, the design based on the strength and ductility factor alone is not always reasonable, and the energy absorption capacity of structures is a better index for evaluating seismic safety. This study quantitatively investigates the energy absorption capacity of reinforced concrete (RC) column subassemblies. Five RC columns were tested under four types of repeated loading. Once the energy absorption capacity is calculated, the structural safety under strong earthquake motion may be judged by the comparison between the energy imparted to the structure by earthquakes and the energy absorption capacity of the structure.