Example: Determine the following for the given beam section: fc' = 21 Mpa, fy = 420 MPa 1. Depth of stress block, a, at ultimate stage 2. Tensile steel strain, &t, when concrete &c = 0.003 d=400 mm BOTS SAND 3. Type of Failure 4. Reduction Factor 5. Nominal Strength 6. Design Strength OLO b=250 mm 5- Ø25mm

PROBLEM TO SOLVE: 600 mm 400 mm 6-25mm diam. 90 mm Using fc' = 28 MPa, Mmax = +320 kNm Determine the following: a. Cracking Moment (kNm) b. Compressive Stress felt by concrete (MPa) c. Tension Stress felt by the tension bars (MPa) d. Moment of Inertia under critical condition e. Demand Capacity Ratio of Concrete under Compression Stress f. Compression force on concrete (kN) g. Distance of the compression concrete force from the neutral axis (mm)