Answer:
Strange values of shear areas - that is, greater than A – may occur, for example, for parametric thin-walled sections that have an atypical geometry and may not be ideally thin-walled.
The shear areas are calculated according to the theory of thin-walled cross-sections in SHAPE‑THIN. Therefore, the defined cross-section should have reasonable dimensions with regard to the width-thickness ratios. The thickness t* of the connecting null element can be used to affect the shear transfer and thus the value of a shear area.
