Instrumented parabolic-arch bridge experiment on the ST500 digital frame

An arch bridge with a parabolic supporting arch beneath a flexible, eleven-segment roadway. One bridge bearing can be configured as fixed or as a floating roller — letting students measure both the reaction forces and the horizontal displacement of the roller directly with the ST503 distance gauge. Loads clip anywhere along the roadway, and the ST500 software computes the arch forces and support angles from the instrumented ST501 supports, giving a concrete picture of how a parabolic arch transmits roadway load into the abutments.