Parabolic Arch Bridge with Frame (SMT-MM-12)

availability: in stock

investigation of a parabolic arch, optionally statically
determinate (1 fixed support, 1 movable support) or
indeterminate (2 fixed supports)
loading of the arch with a distributed load by way of
7 evenly distributed loads or by point loads or by
suspended roadway with loads
2 dial gauges record the deformation of the arch
under load
weights to compensate for the reactions of a fixed
roadway with 1 set of shackles to be suspended into
the arch; shackles in graduated length
storage system to house the components

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Parabolic arches are popular elements in construction engineering. They can be employed
as bridges or beams for example. Normally these bridges are statically indeterminate. The
special feature of the parabolic arch is that in the arch only normal forces and bending
moments occur, but no shear forces. That is the case when the arch is subjected to a uniform
distributed load and both ends are mounted in fixed supports. This enables arches to be
constructed from loosely set stones – a construction technique which has been in existence
for many centuries. Loads acting upon the inner of the arch are primarily compressive forces
in the direction of the normal force at every point of the arch. SMT-MM-12 includes a preshaped parabolic arch. It can be subjected to point or distributed loads. It is possible to
suspend an elastic roadway and load it. One of the arch’s supports is fixed, the other is
horizontally movable support. Weights are used to undo this movement. The movable
support thus becomes a fixed support. Additional weights compensate for the vertical