From the NLFEA results (Table 2) it appears that the development of a new equation for the concrete cohesion of D-P yield criterion requires the use of the three significant variables: a/d, [f.
The value of the concrete cohesion of D-P yield criterion was computed by NLFEA and the exponents b1, b2, and b3, and the coefficient k in Eq.
The results of NLFEA for the columns NC-4, C5L1, 4S1, where a/d = 3, 5.
The NLFEA results of columns are discussed as follows.
Therefore, NLFEA point out that there is no effect of stirrup nominal strength ([p.