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Reinforce concrete sample problems pt3, Lecture notes of Reinforced Concrete Design

Technological University of the Philippines (TUP)Reinforced Concrete Design

sample problems of singly reinforced beam pt3

Typology: Lecture notes

2020/2021

Uploaded on 04/09/2021

MarkFeitanReyes
MarkFeitanReyes 🇵🇭

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M1E3
Friday,(March(19,(2021
4:58(PM

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M1E

Friday, March 19, 2021 4:58 PM

Example: Determine the following for the given beam section P b =250 mm Use f,.’ =21MPa, fy =420 MPa 1. Depth of stress block, a 2. Tensile steel strain, €,, when concrete €=0.0 3. Type of Failure 4. Reduction Factor 5. Nominal Moment Capacity 6. Ultimate Moment Capacity 5- @25mm S fi C.-T OB Feab = Aste ASSUME STEEL YIEWs 0-85 (21)(a) (250) = SU(25) /y x 4x0 = 230.9944508 my A) e721 -® & Oe C= 271.9640 704mNn —> VERIFY AsSUMPTION tole) 0 (4) REVISE ASSUMPTION or = 2&2. |2 ad > Cz = -C25.406 A= Ai = 085 @) Q= 208.39048% VERIFY — ASSumPpnion : © 3S- G00 (‘-® \ = 3F%.903407 < Fy <= CORRECT ASSUMPTION row STIFEL DOEC NOYYVELD U Ec = a - © | 0.001% 945 \74 S57 200,000 My = 0x5 feab(d-«}) = 0.9 (i) ) (200) (A00- @) ) Myn= Z27G-08GS15 + Mn > 275.0865156 % KN-/ Murz ONy = Ot (27b. ORebIS> ) Mu = 178 -€062452 KN-m Re"