Home           Products           Company           Contact us     
> Statics
> Strength of Materials
> Dynamics
> Fundamentals of Engineering Design
> Machinery Diagnosis
> Properties of Materials
Products  |  Engineering Mechanics and Machine Elements  |  Statics  |  SE 110.18
SE 110.18 Forces on a Suspension Bridge Show data sheet (pdf file) Print page
Technical Description

Suspension bridges are among the oldest of all bridge designs. Their main supporting element is a flexible cable. Since cables are able to absorb high tensile forces while themselves having little dead-weight, they enable wide-span suspension bridges to be constructed. This makes it possible to bridge longer distances with no supporting pillars, such as over wide gorges. The sag of suspension bridge supporting cables is parabolic in shape, as the load is attached at relatively short, constant intervals by way of vertical cables to the main supporting cables.
  The experimental set-up SE 110.18 represents a suspension bridge. The bridge consists of two parallel supporting cables with a roadway suspended between them. U-shaped hangers serve as vertical cables. They are attached to the main supporting cables at regular intervals, and hold the roadway. Deflection rollers act as pylons. The roadway acts upon the supporting cables as a distributed load, and can be loaded by additional weights. It has a hinge in the middle. The hinge permits internal moments in the roadway occurring in response to uneven loading to be visualised - the roadway buckles.
  The tensile forces in the supporting cables are determined with the aid of weight sets. With two supports it is possible to simulate fixed roadway supports. The supports include force gauges. With the force gauges the

load distribution between the supports and the supporting cable is investigated.

  The various elements of the experiment are clearly laid-out and housed securely in a storage system. The complete experimental set-up is arranged in the frame SE 112.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.


Learning Objectives / Experiments
- Familiarisation with a suspension bridge
  * under dead-weight
  * under additional load
  * under evenly distributed load
  * under unevenly distributed point loads
- Calculation of the supporting cable force
- Comparison between calculated and measured
   values of the supporting cable force
- Observation of the effect of internal moments in the
   roadway under uneven load
- Load distribution between roadway support and
  supporting cable

* Supporting cable forces of a suspension bridge1
* Central hinge to demonstrate bending moments in
  the roadway1
* Different load cases possible: point or distributed


Available accessories
SE 112 -- Mounting Frame
Alternative products
SE 110.12 -- Lines of Influence on the Gerber Beam
SE 110.16 -- Parabolic Arch
SE 110.17 -- Three-Hinged Arch 

[1] Investigation of a suspension bridge in various load cases
[2] Suspension bridge with 2 supporting cables and roadway
[3] Supporting cables with parabolic sag
[4] Hangers (vertical supporting cables) in the form of U-shaped shackles in graduated lengths
[5] Two-section roadway with central hinge
[6] Roadway can be loaded by additional weights
[7] Hinge in roadway indicates internal moments of roadway under uneven loading
[8] 4 graduated weight sets to measure the cable force in both supporting cables
[9] 2 supports with force gauge for the roadway
[10] Storage system to house the components

[11] Experimental set-up in frame SE 112

Technical Data
Suspension bridge
- span: approx. 1050mm
- supporting cable sag: approx. 325mm
- number of supporting cables: 2
- shackles: 12, graduated lengths
- dead-weight of roadway: 6N
Support force measuring range: -50...+50N
Weight set
- 4x 1N (hangers), 16x 1N 
- 16x 5N
Dimensions and Weight
Weight: approx. 19 kg
Scope of Delivery
1 suspension bridge, consisting of 2 supporting cables, 12 shackles, 1 roadway 
2 deflection roller with fixture
2 supports with force gauge
4 sets of weights
1 storage system
1 set of instructional material
Order Details

022.11018  SE 110.18  Forces on a Suspension

© 2005 G.U.N.T. Gerätebau GmbH