🌉 Three-Hinged Arch: Horizontal Thrust, Moving Load and Bending Moment (2D)

Elevation of a parabolic three-hinged arch with hinges at both supports and the crown. Set span, rise, a point load and a uniform load, move the point load along the span and read the reactions, the horizontal thrust and the bending moment diagram. The thrust H = M0/f and the funicular case of zero moment come from statics, with four in-page numerical checks. A structural companion to the 3D wrought-iron bridge laboratory.