articulated beam with two cantilever beams and a suspended beam as an example of a typical bridge

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 so-called 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 SE 110.12with two cantilever beams and a suspended beam between them.
• Two supports support each cantilever beam.
• The suspended beam is mounted on articulated supports on each of the cantilever beam arms.
• As a result, the entire beam is statically determinate.
• The cantilever beam supports are equipped with force gauges which indicate the support reactions.
• Single loads and a moving load are provided to place load on the beam.
• This means the beam can be subjected to point or distributed loads, or to a moving load.
• The force gauges indicate the effect of a moving load directly in the support reactions.
• The supports are movable.
• All the component elements of the experiment are clearly laid-out and housed securely in a storage system.
• The complete experimental setup is arranged in the frame SE 112.

Technical Details:

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 loads
5. 4 movable supports with force gauge
6. storage system to house the components
7. experimental setup in frame SE 112

Technical Data:

Beam:

• total length: 1220mm
• cantilever beam length: 503mm
• suspended beam length: 250mm

Force gauge: ±50N

Weights:

• 24x 5N
• 12x 1N
• moving load: 10+20N

Dimensions & Weight:

• L x W x H: 1170x480x178mm (storage system)
• Weight: approx. 40kg (total)

Learning Objectives/Experiments:

• familiarisation with a Gerber beam
• application of the method of sections and the conditions of equilibrium to calculate the support forces for
• point load
• distributed load
• moving load
• determination of the internal reactions under static load
• shear force curve
• bending moment diagram
• determination of the lines of influence under moving load
• comparison of the calculated and measured reactions for static and moving load

Scope of Delivery:

• 1 Gerber beam (2 cantilever beams + 1 suspended beam)
• 4 supports with force gauge
• 1 moving load
• 1 set of weights
• 1 storage system with foam inlay
• 1 set of instructional material

Features:

• direct indication of reactions
• lines of influence for different load cases

Accessories:

Required: SE 112 Mounting frame

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.