Abstract：To provide a reference for the constitutive model of galvanized iron wire (GIW) confined concrete often used in the small-scale model test of high-rise and long-span concrete structures, thirteen circular columns including three plain concrete columns, three reinforced concrete columns and seven GIW confined concrete columns were designed and tested. The failure processes and stress-strain curves of GIW confined concrete columns under uniaxial compression loads were compared with those of the reinforced concrete columns. The confinement effect of GIW on core concrete was also compared with that of reinforcement bars. Results show that the elasticity modulus of GIW often used in model tests is only about 60% of that of reinforcement bars. Compared with the plain concrete, the peak strength and deformation capacity of GIW confined concrete are significantly improved. Mander model is more accurate in representing the stress-strain behavior of reinforced concrete with spiral hoops. Park model can estimate the peak compressive stress of the concrete spirally-confined by GIWs well, but may underestimate its ultimate compressive strain and the strain corresponding to the peak stress. The modified Park model can simulate the stress-strain behavior of GIW spirally-confined concrete better.
周连绪 叶爱君 陈方有. 镀锌铁丝约束混凝土应力-应变本构研究[J]. 土木工程学报, 2021, 54(8): 111-119.
Zhou Lianxu Ye Aijun Chen Fangyou. Research on stress-strain constitutive model of concrete confined by galvanized iron wires. 土木工程学报, 2021, 54(8): 111-119.
