SHORT COLUMN EXAMPLE

Consider a short column with the cross section shown. Do the following

a$.$ Determine

a$.$ The axial load capacity $(Vn)$ of the column if there is no moment on the column

b$.$ The tie size and spacing for this case.

USE: $,P_o=0\mathrm{.}85f_c^{\text{'}}(A_g-A_{st})+f_y{A}_{st}$

b$.$ Determine the nominal axial load $($ Pn $)$ and nominal moment $($ Mn $)$ the column can carry in the balanced condition $($strain in the concrete on the top face of the column $=-0\mathrm{.}003$ and strain in the rebar on the bottom side $=f\frac{y}{E}s)$

$f^{\text{'}}c=4,000$

fy $=60,000$ psi

$Es=29,000,000$ psi

#$11$ BARS

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