EXPERIMENTAL RESEARCH ON THE MECHANICAL PROPERTIES OF XINJIANG LONG RECTANGULAR-SECTION POPLAR COLUMN STRENGTHENED BY BASALT FIBER ALTERNATELY UNDER AXIAL COMPRESSION

The mechanical properties of long rectangular section poplar columns strengthened with BFRP fiber cloth are different. By respectively pasting at intervals of 1 layer and 2 layers of BFRP on the poplar columns, the axial compression test was conducted, the failure mode, ultimate bearing capacity, load-strain curve, load-displacement curve, ductility and so on were analyzed.The test results showed that the failure mode of long poplar column was bending failure, compared with the long columns without reinforcement, the ultimate bearing capacity of poplar column was improved by 8.75% and 30%, respectively, transverse pasting BFRP fiber cloth could effectively constrain the lateral deformation of poplar column,improve the capacity of vertical deformation,and further improve the ductility.