Seismic Performance of Nonprestressed and Prestressed HPC Frames under Low Reversed Cyclic Loading

Abstract

Previous studies primarily focused on the seismic performance of high-strength concrete (HSC) members and the static behavior of high-performance concrete (HPC) members. The work presented here aims at studying seismic performance of HPC frames under low reversed cyclic loading to provide guidance to support the design of HPC structures in seismic regions. Experimental studies are conducted to investigate failure patterns, failure mechanism, strains of longitudinal bars, P-Δ curves, characteristic loads, displacement-restoring capacity, displacement ductility coefficient, stiffness degradation, and the energy-dissipation capacity of two-bay, two-story HPC frames under low reversed cyclic loading. Studies indicate that both nonprestressed and prestressed HPC frames show good seismic performance during testing. The two HPC frames both fail in a partial beam sidesway mechanism. The hysteresis area of the nonprestressed frame is larger than that of the prestressed frame, whereas both frames still show relativ...