Forces in various single plane trusses
Using strain gauge technology to measure bar forces
Features
- measurement of the bar forces in a single plane truss
- construction of various truss forms
- bars with strain gauge measurement to measure bar force
Learning objectives/experiments
- measurement of the bar forces in various single plane trusses
- dependency of the bar forces on the external force
-- magnitude
-- direction
-- point of application
- comparison of measuring results with mathematical methods
-- method of joints
-- Ritter’s method of sections
- basic principle: measurement of forces using strain gauge measurement
Specification
[1] investigation of bar forces in a statically determinate truss
[2] construction of various trusses possible
[3] 2 supports with node disks
[4] load application device with force gauge mountable on different node disks
[5] measuring points to measure force on each bar
[6] measuring amplifier FL 152 required
[7] GUNT-software in FL 152 to evaluate measured values graphically
[8] storage system to house the components
[9] experimental setup in frame SE 112
Technical data
Bars: 19
- 2 bars 150mm
- 5 bars 259mm
- 7 bars 300mm
- 1 bar 397mm
- 3 bars 424mm
- 1 bar 520mm
- angle between bars: 30°, 45°, 60°, 90°
- maximum bar force: 500N
- measuring points on each bar
- height of truss max. 450mm
- length of truss max. 900mm
Load application device
- ±500N
- graduation: 10N
LxWxH: 1170x480x178mm (storage system)
Weight: approx. 26kg (total)