Seismic Behavior and Restoring Force Characteristic of Concrete Columns Reinforced with HRB600E High Strength Steel Bars

doi:10.12068/j.issn.1005-3026.2023.01.018

Abstract

Abstract: Square section concrete columns with six HRB600E high strength steel bars and one HRB400E steel bars were tested under cyclic loading to investigate the seismic behavior of concrete columns with HRB600E high strength steel bars. The influence of axial compression ratio， stirrup spacing， the strength of longitudinal reinforcement and longitudinal reinforcement ratio on the seismic behavior of high strength reinforced concrete column was studied. Based on the test results， a restoring force model for concrete columns reinforced with HRB600E high strength steel bars was established. The test results indicated that the specimens had excellent performance in terms of hysteretic behavior， deformability and energy dissipation capacity. With the increase of axial compression ratio， the ductility decreased， but the bearing capacity and energy dissipation capacity increased. As the stirrup spacing decreased， the deformability and energy dissipation capacity increased. When the longitudinal reinforcement ratio increased， the bearing capacity increased， but the ductility and energy dissipation capacity decreased. The restoring force model of HRB600E high strength reinforced concrete column was in good agreement with the test results， which provides a reference for the seismic elastic-plastic analysis of engineering structures.

Key words: HRB600E high strength steel bars; concrete columns; cyclic loading test; seismic behavior; restoring force model

CLC Number:

TP375

LI Yan-yan， PAN Jin， YUE Yuan-yuan， ZHANG Ya-long. Seismic Behavior and Restoring Force Characteristic of Concrete Columns Reinforced with HRB600E High Strength Steel Bars[J]. Journal of Northeastern University(Natural Science), 2023, 44(1): 130-137.

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