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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 if the roadway to the arch below |
Anchorages | securing devices that are embedded in solid rock or massive concrete blocks that 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 that it is acting on |
Tension | a force that acts to expand or lengthen the thing that it is acting on |
Buckling | what happens when force of compression overcomes an objects ability to handle compression |
Snapping | What happens when force of compression overcomes an objects 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 a n existing beam greatly greatly increasing its ability to dissipate the compression and tension |
torsion | a rotational or twist 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 natural vibration of the original thing . Resonance vibrations travel through a bridge in waves |
Dampers | a technique used to interrupt the resonant waves |