郑新志, 郭好振, 孙玉涛.穿孔肋拉杆约束方形钢管混凝土短柱轴压性能数值模拟[J].河南理工大学学报（自然科学版）,2021,40(3):149-155.

ZHENG X Z, GUO H Z, SUN Y T.Numerical simulation of axial compressive performances of square CFSTshort columns constrained by bars through the perforated stiffener[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(3):149-155.

穿孔肋拉杆约束方形钢管混凝土短柱轴压性能数值模拟

郑新志, 郭好振, 孙玉涛

河南理工大学 土木工程学院，河南 焦作454000

摘要:为了提高方钢管混凝土的承载力和延性，提出穿孔肋拉杆约束方钢管混凝土柱。在试验基础上，数值模拟研究了穿孔肋拉杆约束方钢管混凝土短柱的轴压破坏形态、极限承载力和延性。对比分析了穿孔肋拉杆约束方钢管混凝土短柱与仅设加劲肋、仅设拉杆和普通方钢管混凝土短柱在相同条件下的轴压性能，发现穿孔肋拉杆约束方钢管混凝土柱破坏时，沿高度和横截面方向的变形分布比其他3种短柱更加均匀，且有更高的承载力和延性。通过与试验结果对比，模拟与试验结果的荷载-位移曲线在弹性上升段和弹塑性上升段吻合最好，极限承载力 差值在2%以内。穿孔肋拉杆约束方钢管混凝土柱的数值模拟分析对其在工程实际中的应用具有重要的参考价值。

关键词:钢管混凝土;穿孔肋;拉杆;轴压性能;数值模拟

doi:10.16186/j.cnki.1673-9787.2019110056

基金项目:河南省重点研发与推广专项（科技攻关）项目（182102310010）；河南省高等学校重点科研项目（17A560023 ）

收稿日期:2019/11/25

修回日期:2020/03/07

出版日期:2021/05/15

Numerical simulation of axial compressive performances of square CFSTshort columns constrained by bars through the perforated stiffener

ZHENG Xinzhi, GUO Haozhen, SUN Yutao

College of Civil Engineering， Henan Polytechnic University， Jiaozuo 454000 ，Henan， China

Abstract:In order to improve the bearing capacity and ductility of square concrete-filled steel tube （ CFST） columns， the square CFST columns constrained by bars through the perforated stiffener was proposed. On the basis of the experiment， the axial compressive behavior of square CFST short columns constrained by bars through the perforated stiffener was studied by numerical simulation. The axial compressive performance of the CFST short column was compared with other short columns under the same condition. Other CFST short columns included one with only stiffening ribs， one with only bars and an ordinary CFST short column. It was concluded that the square CFST short columns constrained by bars through the perforated stiffener had better bearing capacity and ductility than the others. By comparing with the experimental results， it could be seen that the load-displacement curve of the simulated and experimental results was the best in the elastic rising section and the elastic-plastic rising section， and the difference of ultimate bearing capacity was less than 2% . The numerical simulation analysis of the square CFST columns constrained by bars through the perforated stiffener had important reference value for its application in engineering practice.

Key words:concrete-filled steel tube;perforated stiffener;bar;axial compressive performance;numerical simulation

 穿孔肋拉杆约束方形钢管混凝土短柱轴压性能数值模拟_郑新志.pdf