CURVED BAR STIFFNESS COEFFICIENT MATRIX
The given article puts into consideration a bar, the axis of which is a plane curve delineated on a circular arc. All loads are concentrated in the construction units in the same planar surface. The common prerequisites of arched falsework bending-moment theory are used. The arched falsework distortion is defined by differential equation of 6-th order.The six degree freedom finite element is introduced. In the process of stiff coefficient matrix definition the arched falsework curve homogeneous differential equation complementary function is concluded as the polynomial approximant for a displacement field. Stiffness coefficient matrix elements formulas are ensued.