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structures
Bridges
| Term | Definition |
|---|---|
| Abutments | supports at the end of an arch bridge that carry the load and keep the ends from spreading out. |
| Spandrels | vertical supports of an arch bridge used to distribute the weight of the roadway to the arch below |
| Anchorages | Securing devices that are embedded in the solid rick or massive concrete blocks that spread cables over a large area to evenly distribute the load and prevent the cables from breaking |
| Span | the distance between two bridges supports |
| Compression | A force that acts to compress or shortens the thing it is acting on |
| Tension | A force that acts to expand or lengthen the thing it is acting on |
| Buckling | What happens when the force of compression overcomes an object ability to handle compression |
| Snapping | What happens when tension overcomes an object ability to handle tension |
| Dissipate | To spread force over a greater area so that no one spot has to bear the brunt of the concentrated force |
| Transfer | To move force from an area of weakness to an area of strength |
| Truss | supporting lattice work added to create very tall beams that add rigidity to an existing beam greatly increasing its ability to dissipate the compression and tesion |
| Torsion | A rotational or twisting force |
| Deck-stiffening trusses | A supporting truss system beneath the bridge deck |
| Resonance | A fatal force to a bridge that is a vibration caused by extended force that is in harmony with the natural vibration of the original thing.Resonance vibration travel through a bridge in waves |
| Dampeners | A technique used to interrupt the resonant waves |