Testing Research On Performance Of Strengthening Concrete Column With Carbon Fiber Sheet

It is very important to study affecting on the concrete structures strengthened by CFS under the freeze-thaw action. Basic capability of the concrete column reinforced by CFS has performed under effects of different environments including normal temperature and circulation of the freeze-thaw action. The main research works are accomplished as follows.1 , Through the experiments on 28 synthesized specimens with CFS and glue, The composite material being affected under four kinds of environments involving normal temperature and the 50 times, 75 times and 100 times of the freeze-thaw action cycles, durability of the composite material has been researched under the different environments. Elastic modulus , tensile strength| and elongation percentage and so on has been researched under this circumstances in this paper.2, Through the experiments on 20 concrete specimens with CFS composite material, cementation relationship between the concrete and the CFS was studied. Effects of the environment on the positive direction tensile strength were very important to the concrete structure reinforced by CFS.3, Through the experiments on 8 concrete specimens with CFS under the different environments (as shown in the second paragraph), the bonding slippage and the shear strength between the concrete and the CFS have been studied. Under these environments the effects on architecture structure reinforced by CFS has been studied in this paper.4, The effects on the different reinforced manners of CFS on the concrete column, which has undergoed the different environments of normal temperature and circulation including 50 times, 75 times and 100 times of the freeze-thaw action, have performed. Based on the test research of the 40 strengthened concrete column specimens by CFS, ultimate strain of CFS, lengthwise displacement of the column and ultimate compressive strength and so on has been studied in this paper. What is the better manner of the concrete columnstrengthened by CFS under the special condition has been put forward.The results of the experimental investigation reported in this paper can provide useful reference for compiling the technical regulation for CFS concrete.