=

=

=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。