AXIAL COMPRESSION PERFORMANCE OF CONCRETE COLUMNS STRENGTHENED WITH PRESTRESSED HIGH STRENGTH STEEL WIRE MESH

An innovative concrete reinforcing technique of prestressed high strength steel wire (steel wire rope) mesh (PSWM) is presented. Approximate full-scale tests of 24 concrete circular columns strengthened with PSWM and 2 contrast columns were put forward to research the strengthening effects of main experimental parameters of the steel wire spacing and the prestressing level of steel wire under axial loading. The test results show that the peak stress and strain of the strengthened columns are 83% and 95% greater than those of the contrast columns. By raising the steel wire prestressing level, the reinforcing effect is improved; with steel wire spacing decreased, strengthening effect is greatly improved. The formula of peak stress & strain and 2 kinds of stress-strain full curve relationship models of the columns strengthened with PSWM were proposed. The calculated results agree well with the experimental ones and a theoretical support for related research. The presented technology is an attractive, nondestructive, and efficient reinforcement technology, worthy of popularization and application.