PROBLEMS

$5\mathrm{.}1$ A post$-$tensioned bonded prestressed beam has the cross section shown in Figure P$5\mathrm{.}1.$ It has a

span of $75ft(22\mathrm{.}9m)$ and is subjected to a service superimposed dead load $W_{SD}=450$ plf

$k\frac{N}{m}$ and a superimposed service live load $W_L=2,300$ plf $(33\mathrm{.}6k\frac{N}{m}).$ Design the web rein$-$

forcement necessary to prevent shear cracking $($a$)$ by the detailed design method and $($b$)$ by the

alternative method at a section $15ft(4\mathrm{.}6m)$ from the face of the support. The profile of the pre$-$

stressing tendon is parabolic. Use #$3$ stirrups in your design, and detail the section. The following

data are given:

$)2$

$($This question from Prestressed Concrete: A Fundamental Approach $5$th$,$ by Edward Nawy$)($ if you find the Manual Solution it will help better $,$ Thank you $)$