|本期目录/Table of Contents|

[1]邓宗才,姚军锁.箍筋约束超高性能混凝土柱受压性能研究进展[J].建筑科学与工程学报,2020,37(01):14-25.[doi:10.19815/j.jace.2019.01046]
 DENG Zong-cai,YAO Jun-suo.Research Progress on Compressive Behavior of Stirrup-confined Ultra-high Performance Concrete Columns[J].Journal of Architecture and Civil Engineering,2020,37(01):14-25.[doi:10.19815/j.jace.2019.01046]
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箍筋约束超高性能混凝土柱受压性能研究进展(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
37卷
期数:
2020年01期
页码:
14-25
栏目:
出版日期:
2020-01-13

文章信息/Info

Title:
Research Progress on Compressive Behavior of Stirrup-confined Ultra-high Performance Concrete Columns
文章编号:
1673-2049(2020)01-0014-12
作者:
邓宗才姚军锁
(北京工业大学 城市与工程安全减灾教育部重点实验室,北京 100124)
Author(s):
DENG Zong-cai YAO Jun-suo
(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China)
关键词:
超高性能混凝土柱 受压性能 研究进展 箍筋约束 轴心受压 偏心受压
Keywords:
ultra-high performance concrete column compressive behavior research progress stirrup-confined axial compression eccentric compression
分类号:
TU375.3
DOI:
10.19815/j.jace.2019.01046
文献标志码:
A
摘要:
为研究箍筋约束超高性能混凝土(UHPC)柱的受压性能和结构设计方法,对约束混凝土柱的研究与发展进行总结分析,讨论了6种简化的约束混凝土本构模型; 重点介绍了国内外关于箍筋约束UHPC短柱、长柱的轴心受压、偏心受压力学特性最新研究成果,并对影响柱受压特性的主要因素等进行分析总结; 对目前研究中存在的问题进行了探讨,并对箍筋约束UHPC柱的未来研究方向进行展望。结果表明:目前研究主要集中于普通箍筋约束UHPC短柱的轴压性能; 箍筋约束UHPC柱需要较高的约束应力才能充分利用UHPC的高性能,并能显著改善构件延性; 钢纤维能延缓保护层开裂,抑制保护层脱落,提高构件的抗损稳定性,与箍筋具有协同组合效应并能共同发挥约束效果; 建议在UHPC构件设计时考虑纤维特性而适当减少配筋,箍筋约束UHPC短柱的轴压承载力计算可偏保守地参考普通混凝土轴压短柱承载力计算模型; 箍筋约束普通、高强混凝土本构模型不能准确评估箍筋约束UHPC柱的轴压特性,建议开发预测精度较高的箍筋约束UHPC柱的本构模型。
Abstract:
In order to study the compressive behavior and structural design method of stirrup-confined ultra-high performance concrete(UHPC)columns, the research and development of confined concrete columns were summarized and analyzed, and six simplified constitutive models of confined concrete were discussed. The latest research results of axial compression and eccentric compression characteristics of stirrup-confined UHPC short and long columns at home and abroad were mainly introduced, and the main factors affecting the compressive characteristics of columns were analyzed. The existing problems in the current research were discussed, and the future research direction of the stirrup-confined UHPC columns was prospected. The results show that the present research mainly focuses on the axial compressive behavior of UHPC short columns confined with normal-strength stirrups. The stirrup-confined UHPC columns require more confinement to fully utilize the high-performance of UHPC, and the ductility of the members can be significantly improved. The steel fiber can delay the cracking of cover concrete, restrain the shedding of cover concrete, and improve the stability of components against damage. It has synergistic effect with stirrups and can exert restraint effect together. It is suggested that the fiber characteristics should be taken into account in the design of UHPC members so as to reduce the reinforcement allocation appropriately. Under the action of axial compression, the calculation model of bearing capacity of normal-strength concrete short columns can be conservatively used as a reference for the bearing capacity calculation of stirrup-confined UHPC short columns. The constitutive model of stirrup-confined normal or high-strength concrete cannot accurately evaluate the axial compressive characteristics of the stirrup-confined UHPC columns. It is recommended to build a constitutive model of the stirrup-confined UHPC columns with high prediction accuracy.

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备注/Memo

备注/Memo:
收稿日期:2019-01-16
基金项目:北京市教委科技重点项目(KZ201810005008)
作者简介:邓宗才(1961-),男,陕西扶风人,教授,博士研究生导师,工学博士,博士后,E-mail:dengzc@bjut.edu.cn。
更新日期/Last Update: 2020-01-13