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首页 > 过刊浏览>2024年第27卷第11期 >986-995. DOI:10.3969/j.issn.1007-9629.2024.11.003
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HDFRC-钢管-混凝土叠合柱的轴压性能
作者:
作者单位:

1.华侨大学 土木工程学院，福建 厦门 361021;2.华侨大学 福建省结构工程与 防灾重点实验室，福建 厦门 361021

作者简介:

彭 彪（1997－），男，河南南阳人，华侨大学硕士生.E-mail：pengbiao0410@163.com

通讯作者:

胡红松（1986－），男，浙江慈溪人，华侨大学教授，博士生导师，博士.E-mail：huhs@hqu.edu.cn

中图分类号:

TU398.2

基金项目:

国家自然科学基金资助项目（52278183）；福建省自然科学基金资助项目（2023J02019）


Axial Compression Performance of HighDuctility FiberReinforced Concrete-Steel Tube-Concrete Composite Columns
Author:
Affiliation:

1.College of Civil Engineering， Huaqiao University， Xiamen 361021， China;2.Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province， Huaqiao University， Xiamen 361021， China

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    摘要:

    提出了一种新型高延性纤维混凝土（HDFRC）-钢管-混凝土（HDCSTC）叠合柱，研究了螺杆列数、螺杆强度和螺母类型对HDCSTC叠合柱轴压性能的影响.结果表明：增加螺杆列数能够有效改善试件的峰值后延性；螺杆强度增加，对1列螺杆试件的延性无显著影响，对2列螺杆试件的延性影响较大；吊环螺母能够与外侧高延性纤维混凝土建立有效拉结，改善试件的峰值后性能；HDCSTC叠合柱具有与钢筋混凝土柱同等优异的轴压性能，且施工方便无技术限制，值得推广使用.

    Abstract:

    A new type of high ductility fiber reinforced concrete-steel tube-concrete （HDCSTC） composite column was proposed. The effect of number of screw rows， screw strength and nut type on the axial compression performance was studied. The results show that increasing the number of screw rows can effectively improve the post-peak ductility of the specimen. The increase of screw strength has no significant effect on the ductility of specimens with one row of screws， but has great effect on the ductility of specimens with two rows of screws. The hanging ring nut can establish an effective tensioning knot with the outer high ductility fiber reinforced concrete， and improve the post-peak performance of the specimen. The HDCSTC composite column has the same excellent axial compression performance as the reinforced concrete column， and the construction is convenient and has no technical limitation， which is worthy of popularization.

    表 3 纤维性能指标Table 3 Performance indexes of fibers
    表 5 试件的主要试验结果Table 5 Main test results of specimens
    表 6 试件的轴压刚度Table 6 Axial compressive stiffness of specimens
    表 2 高延性纤维混凝土配合比Table 2 Mix proportion of HDFRC
    图1 HDCSTC 叠合柱构造Fig.1 HDCSTC composite column structure
    图2 试件构造Fig.2 Details of specimens（size： mm）
    图3 HDFRC受拉应力-应变曲线和破坏形态Fig.3 Stress-strain curves and final failure modes of HDFRC under tensile load
    图4 HDFRC受压应力-应变曲线及破坏形态Fig.4 Stress-strain curves and final failure modes of HDFRC under compression load
    图5 钢材的应力-应变曲线Fig.5 Stress-strain curves of the steel
    图6 加载装置和测点布置Fig.6 Loading device and layout of monitoring points（size：mm）
    图7 试件的轴向荷载-应变曲线Fig.7 Axial load-strain curves of specimens
    图8 试件的最终破坏形态Fig.8 Final failure modes of specimens
    图9 螺杆列数对轴向荷载-应变曲线的影响Fig.9 Influence of the number of screw rows on axial load-strain curve
    图10 螺杆强度对试件轴向荷载-应变曲线的影响Fig.10 Influence of screw strength on axial load-strain curve of specimens
    图11 钢管截面的侧向受力图Fig.11 Lateral stress diagram of steel tube section
    图12 核心混凝土有效约束区Fig.12 Core concrete effective confinement zone
    图13 螺母类型对试件轴向荷载-应变曲线的影响Fig.13 Influence of nut type on axial load-strain curves of specimens
    图14 试件RC-50和CC-RHS2的N-ε 对比曲线Fig.14 Comparison of N-ε curves for specimen RC-50 and CC-RHS2
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彭彪,胡红松,吉云鹏.HDFRC-钢管-混凝土叠合柱的轴压性能[J].建筑材料学报,2024,27(11):986-995

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  • 收稿日期:2023-12-17
  • 最后修改日期:2024-03-08
  • 在线发布日期: 2024-12-10
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