The Concrete Section module in the WIN-Statik structural engineering software allows you to either design the required reinforcement or check the specified reinforcement. This can be performed for a number of parametric cross-sections.
The software can handle applied moments and shear forces along the principal axes (skew bending) as well as axial force and torque. Reinforcement of various grades and diameters can be mixed, with a powerful graphical management, to build up an arbitrary reinforcement distribution.
Full technical details and the theory behind the Concrete Section module can be found on the WIN-Statik Wiki by clicking here.