（河北工业大学土木与交通学院， 天津 300401）

［摘要］为研究HRB600E钢筋对混凝土柱抗震性能的影响，对7根分别配有HRB600E，HRB500，HRB400钢筋的混凝土柱进行低周反复加载试验，分析轴压比、配箍特征值和钢筋强度对试件的破坏形式、滞回曲线、骨架曲线、延性及耗能能力等抗震性能的影响。结果表明：各试件破坏形态均为弯曲破坏，HRB600E钢筋能够发挥其强度优势；高轴压比下，试件刚度退化加快，延性降低，承载力和耗能能力增大；配箍特征值的增大，延缓斜裂缝开展，改善试件的滞回性能，延性和耗能能力提高；随着钢筋强度提高，配有HRB600E钢筋的混凝土柱试件承载能力稍有增加，刚度退化更平缓，延性和耗能能力有所降低，但仍满足规范要求，可以达到节省钢材的目的。

［关键词］高强钢筋； 钢筋混凝土柱； 轴压比； 配箍特征值； 抗震性能； 延性

中图分类号：TU375-3文献标识码：A文章编号：1002-848X(2020)15-0058-05

Experimental research on seismic performance of concrete columns reinforced with HRB600E steel bars

LI Yanyan, MIAO Shaozheng, ZHANG Yalong

(School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China)

Abstract:To study the seismic behavior of concrete columns reinforced with HRB600E steel bars, seven specimens reinforced with HRB600E, HRB500 and HRB400 steel bars were tested under the low cyclic loading experiments. The results of failure pattern, hysteretic curves, skeleton curves, ductility and energy dissipation capacity were compared to analyze the effect of axial compression ratio, stirrup characteristic value and reinforcement strength on seismic behavior. The result shows that all of the specimens present flexural failure and the HRB600E steel bars can exert its strength. With high axial compression ratio, the bearing capacity is enhanced but the ductility and energy dissipation capacity are  decreased, and the rigidity degeneration trend to be quicker. With the stirrup characteristic value increasing, the development of diagonal cracks is delayed. The hysteretic characteristic, ductility and the energy dissipation capacity are improved. Raising the strength of steel, the bearing capacity of the specimens reinforced with HRB600E steel bars is sightly increased and rigidity degeneration becomes smoothly, and  its ductility and energy dissipation capacity are reduced,  but they still meet the specifications. So, it can achieve the purpose of saving steel.

Keywords:high strength steel; reinforced concrete columns; axial compression ratio; stirrup characteristic value; seismic performance; ductility

*河北省自然科学基金项目（E2017202278，E2018202290，E2019202064），河北省交通运输厅科技计划项目（QG2018-2）。

作者简介：李艳艳，博士，教授，Email: nicole_820@163.com; 通讯作者：苗少峰，硕士，Email:18733606289@163.com。