Experimental study on the axial compression performance of CFRP wrapped wood plastic composite hollow short columns

The axial compressive bearing behavior of CFRP reinforced WPC hollow short columns were examined in this paper. Axial compression tests were conducted on four groups of specimens, including one control group without CFRP reinforcement and three groups with surfaces wrapped in one, two, and three layers respectively. Each group consisted of three parallel samples. Digital Image Correlation (DIC) technology was utilized to monitor strain evolution during loading, with results validated against strain gauge measurements. The findings demonstrate that the load bearing capacity of the WPC hollow columns increases with additional CFRP layers. Additionally, increased CFRP layers resulted in reduced lateral strain, indicating enhanced confinement effects. A calculation model for the axial compressive load bearing capacity of CFRP reinforced WPC hollow short columns was developed, showing strong correlation with experimental data, and effectively predicting the load bearing performance of the reinforced columns.