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=

=

=0.06

ξ=1- =0.062<0.85 =0.440,不会发生超筋破坏。

纵向受力钢筋面积: =ξ b =0.062×

×1000×955=1957

ρ=

=

=0.2% =0.2%,选配

满足要求。