EXPERIMENTAL STUDY ON MECHANICAL PROPERTY OF CONCRETE COLUMNS CONFINED BY TRC UNDER UNIAXIAL COMPRESSION

To study the mechanical property and constraint mechanism of concrete columns confined by TRC under uniaxial compression，24 concrete columns confined by TRC and 8 unstrengthened concrete columns were designed based on textile ratio，section dimension and strength of concrete，and axial compressive tests were carried out． Based on the test results，stress process and failure mode of strengthened members were studied，stress-strain relationship of strengthened members was researched，effect of textile ratio，section dimension and concrete strength on ultimate strength of strengthened members was also evaluated． The results showed that the strength and deformability of the strengthened members increased，and the strengthened members showed drum-shaped shear damage． With the increasing of textile ratio，the confining effect of TRC on the concrete increased． With the increasing of section dimension，the confining effect of TRC on the concrete decreased． The confining effect of TRC on low strength concrete was stronger． The formulas of concrete columns confined by TRC were proposed． The calculated results agreed well with test results．