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Structures
Bridges
Term | Definition |
---|---|
Abutments | support 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 rock or massive concrete blocks spread cables over a large area to evenly distribute the load and prevent the cables from breaking free |
Span | the distance between two bridge supports |
compression | a force that acts to compress or shorten 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's ability to handle compression |
Snapping | what happens when the tension overcomes an object's ability to handle tension |
Dissipate | to spread force over a greater area so that no one spot has to bear the brunt of 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 tension |
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 an extended force that is in harmony with the natural vibration of the original thing. Resonance vibrations travel through a bridge in waves |
Damperners | a technique used to interrupt the resonant waves |