钢纤维增强高强钢筋混凝土梁柱节点抗震性能试验研究

doi:10.12068/j.issn.1005-3026.2020.10.016

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (10): 1465-1475.DOI: 10.12068/j.issn.1005-3026.2020.10.016

钢纤维增强高强钢筋混凝土梁柱节点抗震性能试验研究

张健新^1,2，张标^1,2，戎贤^1,2，丁传林^1,2

(1.河北工业大学土木与交通学院，天津300401; 2.河北省土木工程技术研究中心，天津300401)

收稿日期:2020-01-17 修回日期:2020-01-17 出版日期:2020-10-15 发布日期:2020-10-20
通讯作者: 张健新
作者简介:张健新(1986-)，女，河北唐山人，河北工业大学讲师，博士; 戎贤(1965-)，男，河北定州人，河北工业大学教授.
基金资助:
国家自然科学基金资助项目(51978234)；河北省自然科学基金资助项目(E2018202290，E2017202278，E2017202111).

Experimental Research on Seismic Behavior of High Strength Bar Concrete Beam-Column Joints Reinforced by Steel Fiber

ZHANG Jian-xin， ZHANG Biao， RONG Xian， DING Chuan-lin

1. School of Civil and Transportation Engineering， Hebei University of Technology， Tianjin 300401， China; 2. Civil Engineering Technology Research Center of Hebei Province， Tianjin 300401， China.

Received:2020-01-17 Revised:2020-01-17 Online:2020-10-15 Published:2020-10-20
Contact: ZHANG Jian-xin
About author:-
Supported by:
-

摘要/Abstract

摘要： 为研究配置HRB600高强钢筋钢纤维整体增强混凝土梁柱节点的抗震性能和核心区受剪承载力，进行10个梁柱节点的拟静力试验，研究轴压比、剪压比、配箍率、混凝土种类和钢纤维混凝土的增强范围等对配置HRB600钢筋混凝土梁柱节点抗震性能指标的影响.结果表明:钢纤维整体/局部增强的HRB600钢筋混凝土梁柱节点的滞回曲线更饱满，刚度退化速率更慢，耗能更高.钢纤维混凝土能够显著改善试件的破坏形态，减轻节点的累积损伤.采用《建筑抗震设计规范》计算HRB600高强钢筋钢纤维混凝土梁柱节点的受剪承载力时，对于配箍率较低的节点较为保守，对于配箍率较高的节点的计算结果更接近于试验值.美国ACI 352—02规范比中国《建筑抗震设计规范》的受剪承载力计算值的安全储备高.

关键词: 梁柱节点, HRB600高强钢筋, 钢纤维混凝土, 拟静力试验, 抗震性能

Abstract: In order to investigate the seismic behavior and shear bearing capacity of HRB600 high strength bar concrete beam-column joints reinforced by steel fiber， a quasi-static test of 10 beam-column edge joints was carried out. The influence of axial compression ratio， shear compression ratio， stirrup ratio， concrete type and reinforced range of steel fiber concrete on the seismic behavior index of HRB600 reinforced concrete beam and column joints was studied. The results show that the hysteresis curve of the HRB600 reinforced concrete beam-column joint with overall/local steel fiber is fuller， the rate of stiffness degradation is slower， and the energy consumption is higher. The steel fiber reinforced concrete can significantly improve the failure mode of the specimen and reduce the cumulative damage of the joints. When the formula of “Code for Seismic Design of Buildings” is used to calculate the shear bearing capacity of HRB600 high strength bar concrete beam-column joints reinforced by steel fiber， it is more conservative for specimens with a lower stirrup ratio， closer to the experimental value for high stirrup ratio. The predictions calculated by ACI 352—02 have a higher safety margin than the predictions given by “Code for Seismic Design of Buildings”.

Key words: beam-column joint, HRB600 high strength bar, steel fiber concrete, quasi-static test, seismic behavior

中图分类号:

TU375

张健新，张标，戎贤，丁传林. 钢纤维增强高强钢筋混凝土梁柱节点抗震性能试验研究[J]. 东北大学学报:自然科学版, 2020, 41(10): 1465-1475.

ZHANG Jian-xin， ZHANG Biao， RONG Xian， DING Chuan-lin. Experimental Research on Seismic Behavior of High Strength Bar Concrete Beam-Column Joints Reinforced by Steel Fiber[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1465-1475.

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钢纤维增强高强钢筋混凝土梁柱节点抗震性能试验研究

Experimental Research on Seismic Behavior of High Strength Bar Concrete Beam-Column Joints Reinforced by Steel Fiber

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