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由于预应力筋与孔道壁之间的摩擦作用,钢筋张拉时的伸长和锚固后的回缩都不是自由的,因其变形要受到摩擦阻力的影响。这种摩擦阻力是由曲率摩阻(Curvature friction)和贴动摩阻(Wobble friction)两部分组成的[1]。摩擦影响的大小主要
Due to the friction between the prestressed tendons and the wall of the cell wall, the elongation of the steel bar and the retraction after the anchoring are not free, because the deformation of the steel bar is affected by the frictional resistance. This frictional resistance is composed of Curvature friction and Wobble friction [1]. The size of the friction effect is mainly