Experiment for the study of the characteristics of a two-pinned arch under various load conditions. Mounts on the Structures platform and connects to the Structures automatic data acquisition unit and software (VDAS® Onboard).
Key Features
• One of a range of experiment modules that teach structures principles
• Fits to the Structures platform for ergonomic use and space-saving storage
• A simplifi ed version of a realistic structure to give students an understanding of real-life structures
• Includes multiple loads for many combinations of loads including uniformly distributed loads (UDLs)
• Supplied with a storage tray to keep smaller items safe
• Direct reading of horizontal reaction for quick and simple experiments
• Complementary experiments available: Three-Pinned Arch (STS9) and Fixed Arch (STS11)
• Works with user-friendly software (VDAS®)
Description
One of a range of experiment modules that fi t to the Structures platform (STS1, available separately), this product helps students to understand how loads aff ect the horizontal reaction forces in a two-pinned arch.
Students apply loads to hangers suspended from the arch, held between two supports. One support allows rotational movement only, acting as a pinned support. The other support allows translational movement, acting as a roller support. A load cell prevents the translation, while measuring the horizontal reaction due to the load. Each support includes pointers that work with the scale on the platform for accurate positioning. Students use textbook equations to predict the reaction forces due to the load, comparing them with measured results, and learn how to create the infl uence line and bending moment diagrams. This helps confi rm the reliability of the textbook equations and the accuracy of the experiment results.
This product includes additional masses so students may apply a uniformly distributed load (UDL) across the span of the arch for comparison of results with a single point load.
The load cell connects to the USB interface hub of the Structures platform for computer display and data acquisition (VDAS® Onboard).
Learning outcomes
• Horizontal reaction due to a varying single point load on a statically indeterminate structure
• Horizontal reaction due to a moving single point load on a statically indeterminate structure
• Horizontal reactions due to a uniformly distributed load on a statically indeterminate structure
• Infl uence lines and superposition
• Lines of thrust in an arch
• Graphical construction of a bending moment diagram for point loads
• The Secant assumption
• Maximum bending moments due to a load on an arch
Essential Ancillary
• Structures Platform (STS1)
