Abstract: To address the issues of low stiffness around minor axis and insufficient bond strength between flat steel plate and concrete in partially encased composite(PEC) columns, a novel PEC column with corrugated webs is proposed in this study. The minor axis seismic performance of PEC column with corrugated webs was investigated through quasi-static cyclic loading tests on two composite columns featuring different web configurations. The deformation development and ultimate failure modes of the composite columns were observed, while the seismic performance indices such as hysteretic curves and ductility coefficients were analyzed. Furthermore, parametric studies were conducted using finite element models to evaluate the effects of axial compression ratio, concrete strength, tie bar spacing, steel strength, and flange thickness on the seismic behavior of the proposed column. The results show that both types of composite columns exhibited flexural failure. The hysteretic curves of the PEC column with corrugated webs were full, and its peak bearing capacity and energy dissipation capacity were superior to those of the PEC column with flat webs. The finite element analysis demonstrates that the seismic performance of PEC columns with corrugated webs is significantly influenced by the axial compression ratio. As the axial compression ratio increases, there is a gradual decrease in the bearing capacity. Specifically, when the axial compression ratio increases from 0.2 to 0.6, there is a reduction in bearing capacity by 15.5%. Incorporating tie bars and increasing flange thickness can greatly enhance the bearing capacity, ductility and initial stiffness of the column. Finally, a calculation formula for predicting the compressive-bending capacity of PEC columns with corrugated webs around minor axis is proposed based on existing codes. The relative errors between the calculated theoretical values and the test results are less than 10%, which can provide a reference for the future seismic design of PEC structures with corrugated webs.