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纤维增强复合材料(fiber reinforced polym er,FRP)是建造输电杆塔结构的理想材料之一。介绍了FRP轴压构件的弹性屈曲理论,并根据试件的极限承载力试验值得到了试件的等效初弯曲率,以此来考虑初弯曲、残余应力和端部套管等因素的综合影响。在此基础上推导出了FRP轴压杆件的临界应力和稳定系数的计算公式,并研究了径厚比和老化对FRP轴压构件稳定系数的影响。
Fiber reinforced polym er (FRP) is one of the ideal materials for the construction of transmission towers. The theory of elastic buckling of FRP axial compression members is introduced and the equivalent initial curvature of the specimen is obtained according to the ultimate bearing capacity of the specimens, so as to consider the combined effects of initial bending, residual stress and end bushing . On this basis, the formulas for calculating the critical stress and stability coefficient of FRP axial compression members are deduced, and the effects of radius-thickness ratio and aging on the stability coefficient of FRP axial compression members are studied.