Axial compressive performance of BFRP composite wood winding columns

To investigate the enhancing effect of basalt fiber reinforced polymer (BFRP) layers on the load-bearing capacity of test specimens, both experimental and theoretical investigations were carried out on the compressive behavior of BFRP composite wood winding columns. In this paper, sylvestris pine was used as the primary material, which was manually wrapped with BFRP cloth to form cylindrical thin-walled specimens. Six groups of specimens were set up with the number of BFRP layers as the main variable, 4 specimens in each group and 24 specimens in total. The compressive properties of six groups were tested at a rate of 1 mm/min using a displacement-controlled method. The test results showed that the load carrying capacity of the specimen rose with the increase of the number of BFRP layers. Based on the damage, the specimens were classified into two modes of failure: layer bundle crushing and overall buckling which accounted for 33.3 % and 66.7 % of the total number of specimens, respectively. Based on the continuous strength method, the compressive strength prediction formula of BFRP composite wood winding columns was proposed, and the theoretical and practical results coincided well, which proved that this method had good application value in practice.