34x
001915
2025-02-25

受收缩影响的理想截面特性

Af,ϕ=AI,ϕAII,ϕζd,ϕAI,ϕ+(1-ζd,ϕ)AII,ϕ
If,ϕ=II,ϕIIII,ϕζd,ϕIII,ϕksh,II,ϕ+(1-ζd,ϕ)IIII,ϕksh,I,ϕ

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