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1 常用符号及其文字意义ρ预加力的总称; σ应力的统称; f 砼和预应力钢材单位强度的统称; σ_(?) 张拉控制应力; σ_(pi) 初始预应力(张拉端); σ_(pe) 有效预应力; σ_(L1) 锚固损失; σ_(L2) (预应力筋与孔壁之间)摩擦损失。
1 commonly used symbols and their meaning ρ pre-stress general term; σ stress collectively; f concrete and prestressed steel unit strength collectively; σ_ (?) Tension control stress; σ_ (pi) initial prestress ); σ_ (pe) effective prestress; σ_ (L1) anchoring loss; σ_ (L2) (friction between tendons and hole wall).