Abstract:By introducing trapezoidal corrugated steel plates into PEC columns, a new cross-section form of PEC columns was proposed to overcome the disadvantages of flat web steel plates such as low out-of-plane stiffness, easy buckling, and weak bonding with concrete. Five vertical trapezoidal corrugated web PEC columns with different slenderness ratios and different transverse tie bar spacing were tested under axial compression. By studying its bearing capacity under axial compression, the failure mode, load-displacement relationship curve and load-strain relationship curve of the specimen under axial compression load were obtained, and the law of its bearing capacity was further analyzed. The experimental study showed that the failure modes of all specimens were similar, which were compressed flange drum and concrete crushing failure. The restraint form composed of transverse tie bars, flanges and corrugated webs could better restrain concrete, improve its compressive strength, improve the ductility of members, and enhance the deformation capacity. With the increase in slenderness ratio, the initial stiffness and peak bearing capacity of the specimen decreased, but the deformation capacity after the peak increased and the ductility was better. With the decrease of transverse tie bar spacing, the initial stiffness, peak load, and ductility coefficient of the specimen increased, and the specimen had a better axial compressive performance. The finite element model was established by ABAQUS. Additionally, on the basis of verifying the validity of the finite element model and referring to the relevant codes at home and abroad, the superposition principle was used to fit and obtain the bearing capacity calculation formula of vertical trapezoidal corrugated web PEC column under axial compression combined the test results and finite element extended parameter simulation. It was found that the calculated results were in good agreement with the experimental results, which had high reliability and a certain safety reserve.