flexural moment

The bending moment diagram and circle of stress are drawn; the most flexural torque and primary stress are solved in MATLAB.

The method presented here is suitable for analyzing relationship of moment-curvature about the concrete filled circular steel tubular (circular CFST) flexural members too.

On the basis of these results and through calculation of the torsion moment on the cross section, a theoretical formula of the flexural center is derived for the cylinder.