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)