doi:10.16186/j.cnki.1673-9787.2019110056

Received:2019/11/25

Revised:2020/03/07

Published: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