The original version of this article unfortunately contained a mistake. In p.597, the minus on the right side of Eq. (1) “ \(EI\frac{{d^2 y_{cp} }} {{dz_{sl}^2 }} = - M_{sl} (z_{sl} )\) ” was incorrect.

The correct version is given below:

$$EI\frac{{d^2 y_{cp} }} {{dz_{sl}^2 }} = M_{sl} (z_{sl} )$$