Seismic performance of reactive powder concrete columns

Abstract:

To explore the seismic performance of reactive powder concrete (RPC) column, the quasi-static test of 18 RPC columns are carried out. The factors affecting the column failure patterns, hysteretic characteristics, skeleton curves, rigidity, bearing capacity and ductility were analyzed in this paper, which included axial compression ratio, longitudinal reinforcement ratio, stirrup ratio and steel fiber volume content. The results show that, the bearing capacity of reinforced RPC columns increases, but the ductility decreases with the increase of axial compression ratio. The bearing capacity and displacement ductility coefficient of reinforced RPC columns significantly increases with the increase of longitudinal reinforcement. The stirrup ratio has large influence on the hysteretic behavior of reinforced RPC columns and the skeleton curve flattens out as load exceeds the peak point. The steel fiber volume content has large influence on fracture process of RPC columns, with the increase of steel fiber content, and the ductility of reinforced RPC columns can be improved to a certain extent.