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Adimensional Axial Force

Figure 7.2 Value of a as a function of the axial force

It can be seen from the above figure that it is reasonable to assume a value of 0.8 for parameter a. With this assumption and for compression force or moderate tensile force, the values of kc may be estimated as:

hcr yy hcr can be computed as a function of the axial compression and the tensile strength of concrete.

The cracking moment is given by the following condition:

0 0

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