Civil Engineering Reference
In-Depth Information
where A is defined by Eqn 10.5; B is defined by Eqn 10.36; k 2 is defined by
Eqn 10.10; K 2 , K 3 , K 4 and MM are defined by Eqns 10.21b, c, d, and e,
respectively.
For an uncracked section (i.e. x/h 1), the area A (see Eqn 10.5) under the
stress-strain curve in Figure 10.9 a , between e = e Ó c = e c [1-1/ (x/h) ] and e = e c , is
completely defined by the concrete strain e c and the neutral axis depth x.
Hence, for a given value of e c (i.e. of e c / e cu ), the values of A and the
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