HST4 Three Hinged Arch

HST4 Three Hinged Arch

A 1.0 metre flat bridge deck is formed using two symmetrical arches. The arches have springings (hinges) at their outer most ends and at the crown (centre), thus creating the three hinges. The left hand springing is held in position whilst allowing rotational movement of the arch section. The right hand springing allows the arch section to rotate and move horizontally against a load cell on a track plate.

The load cell measures the horizontal thrust created when a uniformly distributed load or tandem load is applied to the arch bridge deck. The horizontal thrust from the load cell is measured using the HDA200 Interface (sold separately). The tandem load simulates a rolling vehicle, and can be dismantled to produce two point loads of different magnitude.

Two arch arrangements are supplied. One being a symmetrical arch and the other being an unsymmetrical arch. Both being easily interchangeable. The arch bridge deck allows for unrestricted positioning of the loads along the arch span. 

A comprehensive instruction manual for lecturer and student, giving full details on apparatus assembly and operation as well as example results. All necessary assembly and operational tools are provided.

Essential accessories: HST1, HDA200

HST4 Three Hinged Arch
  • Three hinged arch in symmetrical and interchangeable unsymmetrical arrangements
  • Symmetrical arch; Rise = 200mm, span 1000mm
  • Unsymmetrical arch: Rise = 250mm, span =750mm
  • Load cell measures horizontal thrust
  • Eight calibrated load bars supplied; 12.5N/m each
  • Rolling loads of 10N and 25N with joining link
  • Multiple load positions achievable
  • Must be used with HST1 universal Frame and Stand (sold separately)
  • Must be used with HDA200 Interface (sold separately)
  • Comprehensive instruction manual provided
  • 2 year warranty
  • Relationship between horizontal thrust at arch springing for varying applied loads
  • Simulation of vehicle passing over arch using tandem rolling load
  • Value of horizontal thrust at arch springing
  • Comparison of theory with experimental results
  • Influence line for horizontal thrust
  • Use of influence line for a tandem rolling load
  • Understand characteristics of symmetrical and unsymmetrical three hinged arch