（1 天津大学建筑工程学院， 天津 300072； 2 滨海土木工程结构与安全教育部重点实验室（天津大学）， 天津 300072； 3 奥雅纳工程顾问， 深圳 518048）

［摘要］为研究轴压比、新增纵向钢筋配筋率、新增箍筋的直径及间距对增大截面加固钢筋混凝土柱抗震性能的影响，建立了加固钢筋混凝土柱有限元模型，通过与加固柱在往复荷载作用下的试验滞回曲线进行比较，验证了模型的有效性，并将模型应用于加固柱的抗震性能分析中。参数分析结果表明：增大截面加固钢筋混凝土柱随轴压比的增加滞回曲线饱满程度降低，屈服后位移循环次数减少，不利于抗震；加固柱的水平承载力和刚度随着新增纵筋配筋率的增加而大幅提升；减小加密区的箍筋间距、增加新增箍筋的直径改善增大截面加固柱的延性性能效果显著。

［关键词］加固钢筋混凝土柱； 轴压比； 新增纵向钢筋配筋率； 新增箍筋

中图分类号：TU375-3文献标识码：A文章编号：1002-848X(2019)04-0049-05

Analysis of parameter influence on seismic behavior of reinforced RC columns

Quan Shaohua1, Zhao Hailong1,2, Wang Tiecheng1,2, Lin Hai3

(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China； 2 Key Laboratory of Coast Civil Structure  and Safety(Tianjin University), Ministry of Education, Tianjin 300072, China; 3 ARUP, Shenzhen 518048, China)

Abstract:In order to study the influence of several parameters such as axial compression ratio, the new longitudinal reinforcement ratio, the new stirrup diameter and spacing on seismic behaviors of RC columns by enlarging section, a finite element analysis model was proposed. Compared with experimental hysteretic curves, it is shown that computational results are acceptable, indicating that the model proposed could be applied to the seismic analysis of reinforced RC columns. The analysis results of different parameters show that: with axial compression ratio increasing, the full extent of load-displacement hysteretic loops of the RC columns by enlarging section reduced, and the number of displacement cycles minimized after yield, which against seismic. Furthermore, increasing the new longitudinal reinforcement ratio can significantly improve the horizontal bearing capacity and stiffness of the reinforced columns. In addition, increasing the diameter of the new stirrup and reducing its spacing during encryption area can obviously improve the ductility of RC columns by enlarging section.

Keywords:reinforced RC columns; axial compression ratio; the new longitudinal reinforcement ratio; the new stirrup diameter and spacing

通讯作者：赵海龙，博士，副教授，Email: zhaohailong@tju.edu.cn。