HRB600E高强钢筋混凝土柱抗震性能及恢复力特性

为研究HRB600E高强钢筋混凝土柱抗震性能，对6根配置HRB600E高强钢筋与1根配置HRB400E普通钢筋的正方形截面混凝土柱进行低周往复荷载试验.研究轴压比、箍筋间距、纵筋强度和纵筋配筋率对高强钢筋混凝土柱抗震性能的影响，建立HRB600E高强钢筋混凝土柱恢复力模型.研究结果表明：配置HRB600E高强钢筋混凝土柱的滞回性能、变形能力与耗能能力良好；轴压比增大，试件延性降低，承载力与耗能能力提升；减小箍筋间距，试件变形能力与耗能能力增强；增大纵筋配筋率，试件承载力提升，耗能能力与延性降低；建立的HRB600E高强钢筋混凝土柱三线型恢复力模型与试验结果吻合较好，为工程结构弹塑性分析提供参考.

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

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.