Manual for Design and Detailings of Reinforced Concrete to ...

To cater for the “rigorous concrete stress strain relation” as indicated in Figure 2.1 for design purpose, a “simplified stress approach” by assuming a rectangular stress block of length 0.9 times the neutral axis depth has been widely adopted, as similar to BS8110. However, the Amendment No. 1 of the

  Stress, Relations, Strain, Stress strain relation