Stress on Gerber Beams Model MT 047

* Articulated beam with two cantilever beams and a suspended beam as an example of a typical bridge1
* Direct indication of reactions1
* Lines of influence for different load cases

Item Description

Many bridges are executed as Gerber beams. Bridges are subjected to moving loads. Consequently, it is important to take these moving loads into account in the design process. To that end, the socalled lines of influence are determined. Lines of influence describe static reactions to a moving load, such as the internal reactions of the beam or support reactions. The lines of influence are determined by way of method of sections and the conditions of equilibrium, in the same way as the bending moment diagram for a static load for example.
A Gerber beam is an articulated beam, in the case of Sci-tech Stress on Gerber Beam Model MT 047 with two cantilever beams and a suspended beam between them.

Technical Specifications

[1] investigation of the lines of influence in a statically determinate Gerber beam under different
loading
[2] Gerber beam comprising 2 cantilever beams and 1 suspended beam
[3] suspended beam mounted by articulated supports on cantilever beams
[4] beam subjected to moving load or loaded down by single weights
[5] 4 movable supports with force gauge
[6] storage system to house the components
[7] experimental set-up in frame

Technical Specifications
Beam
– total length: 1220mm
– cantilever beam length: 503mm
– suspended beam length: 250mm
Force gauge: -50…+50N
Weights
– 24x 5N
– 12x 1N
– moving load: 10+20N