GFRP轴心受压构件的稳定性能

Stability of Axial Compression Members of Glass Fiber-Reinforced Plastic(GFRP)

通过对50根不同截面形式、不同尺寸的GFRP(玻璃钢)构件进行轴心受压试验,研究了构件的变形特征、破坏形态和稳定系数,并拟合出基于Perry公式的稳定系数计算式.结果表明:GFRP构件在其失稳后卸载完毕时,变形完全恢复,没有明显的残余变形;GFRP构件失稳前基本呈线弹性特征,破坏时呈脆性特征;GFRP构件失稳类型分为弯曲失稳和扭曲失稳;所拟合出的GFRP轴心受压构件稳定系数计算式的计算结果与试验值吻合较好,表明该计算式具有一定的有效性.

The axial compression experiment of 50 GFRP（glass fiber-reinforced plastic） members with different sections forms and different slenderness ratios were presented.The deformation property,failure modes and stability coefficient of members were tested in the course of this investigation.Calculation formula of stability coefficient was estab lished based on Perry formula.The results show that the deformation of GFRP members vanishes completely after unloading and no significant residual deformation are found.The GFRP members is linear elastic before instability failure occurs and it is brittle at failure.The unstable failure modes include bending failure and distortion failure.The validity of the calculation formula established in this work can be proved by the fact that the calculation results are very close to that of test.