The Study On Mechanical Properties Of Plate Natural Rubber Bearings Under The Conditions Of Erosion Environments

To counter the trend of FRP reinforced concrete is widely used,our daily life and even life and property safety be effected directly for its quality.This paper comprehensive variety of main environmental factors,including the freezing and thawing,salt frozen environment,acid,alkali,alternating wet environment,etc.In the research FRP reinforced concrete of mechanical properties and the change of bonding under the influence of various environmental factors alone.Improvement of FRP reinforced concrete defect situation assessment method and develop a new technical condition evaluation criteria to the FRP reinforced concrete caking relevant basis was provided for testing in the future.The paper study Bond tests of concrete strengthened with FRP sheet's function and mechanical properties under freeze-thaw cycle condition.The specimens are dealt under freeze-thaw cycle condition for 25,50,100,150 times and axial tension.After processing,the dimensions,ultimate tensile strength,adhesive strength are analyzed comparatively.The attenuation model of ultimate adhesive strength created by the method of least squares is approximately according with exponential function.The results have been derived from die-away curve and attenuation function to estimate the mechanical property chang for concrete strengthened with FRP sheet.The paper study Bond tests of concrete strengthened with FRP sheet's function and mechanical properties under acid corrosion cycle condition.The specimens are dealt under acid corrosion cycle condition for 20,60,80,100 times and axial tension.After processing,the dimensions,ultimate tensile strength,adhesive strength are analyzed comparatively.The attenuation model of ultimate adhesive strength created by the method of least squares is approximately according with exponential function.The results have been derived from die-away curve and attenuation function to estimate the mechanical property chang for concrete strengthened with FRP sheet.The paper study Bond tests of concrete strengthened with FRP sheet's function and mechanical properties under caustic corrosion cycle condition.The specimens are dealt under caustic corrosion cycle condition for 20,40,60,80,100 times and axial tension.After processing,the dimensions,ultimate tensile strength,adhesive strength are analyzed comparatively.The attenuation model of ultimate adhesive strength created by the method of least squares is approximately according with exponential function.The results have been derived from die-away curve and attenuation function to estimate the mechanical property for concrete strengthened with FRP sheet.The paper aims to study Bond tests of concrete strengthened with FRP sheet under salt frozen cycle condition.The specimens are dealt under salt frozen cycle condition for 25,50,75 and 100 times and axial tension.The dimensions,ultimate strength,ultimate tensile strength,adhesive strength,are analyzed comparatively.The results show that the longer day the specimen are dealt in salt frozen cycle condition,The more Tensile failure of concrete from superficial or Fiber Reinforce Plastic,it is not easy to be pulled if the higher the level of concrete.Through the comparative analysis of the test results,the bond strength has a great influence under salt frozen when start in the same concrete grades and different duration,but it is not obvious to change later.the adhesivity of FRP more lower if the long time under salt frozen cycle condition and the better if the higher the level of concrete.The adhesivity of CFRP more higher than GFRP.The paper study Bond tests of concrete strengthened with FRP sheet under dry-wet cycle condition.The specimens are dealt under dry-wet cycle condition for 30,60,90,120 times and axial tension.The dimensions,ultimate tensile strength,adhesive strength are analyzed comparatively.the experimental results show that the longer day the specimen are dealt in dry-wet cycle condition,The more Tensile failure of concrete from superficial or Fiber Reinforce Plastic,it is not easy to be pulled if the higher the level of concrete.The bond strength has a great influence under dry-wet when start in the same concrete grades and different duration,but it is not obvious to change later.The attenuation model of ultimate adhesive strength created by the method of least squares is approximately according with exponential function.Dry-wet cycle have a significant impact on adhesive property of low strength concrete and FRP.The adhesive property of CFRP is higher than that of GFRP.