This preview shows pages 1–4. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: s ’ is needed, proceed as follows: ( i ) determine the distance c to the neutral axis corresponding to ε t =0.004 and compute the total compressive force C c produced by concrete for this case. ( ii ) Assuming that A s ’ will yield, determine the required A s ’ to provide sufficient additional compressive force C s such that equilibrium is satisfied by T = C c + C s . ( iii ) Select a pair of bars for A s ’ and check if the provided A s ’ yields at failure. ( iv ) If A s ’ yields, compute the depth of the stress block a using equilibrium ( Σ F x =0) with f s ’= f y ; if A s ’ does not yield, write the quadratic equilibrium equation in terms of c , and solve for c . Assume d ’=3 in. from the very top of the beam. Determine the nominal flexural strength M n and the strength reduction factor Φ . Use f c '=4,000 psi, f y =60,000 psi, and E s =29,000,000 psi....
View
Full
Document
This document was uploaded on 03/03/2010.
 Spring '09

Click to edit the document details