One of a range of experiment modules that fit to the Structures platform Structures platform STS1 (available separately), this product helps students to understand how loads affect the horizontal reaction forces in a three 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. A third set of bearings at the crown of the arch forms a third pinned joint. 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 confirm 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.

*There are 21 different experiments in the Next Generation Structures range.

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: Two-Pinned Arch (STS10) and Fixed Arch (STS11)
• Works with user-friendly software (VDAS^®)

Learning Outcomes

• Horizontal reaction due to a varying single point load on a statically determinate structure
• Horizontal reaction due to a moving single point load on a statically determinate structure
• Horizontal reactions due to a uniformly distributed load on a statically determinate structure
• Influence lines and superposition
• Lines of thrust in an arch
• Graphical construction of a bending moment diagram for point loads
• Maximum bending moments due to a load on an arch

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