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Stuctures
Bridges
Term | Definition |
---|---|
Abutements | supports at the end of a bridge that carry the load and keep the ends from spreading out. |
Sprandrels | vertical supports of an arch bridge used to distribute the weight of a roadway to the arch below. |
Anchorages | securing devices that are embedded in the 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 to 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's acting on. |
Buckling | what happens when the force of compression overcomes an objects's ability to handle compression. |
Snapping | what happens when 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 the concentrated force. |
Transfer | to move force from an area of weakness to an area of strenght |
Torsion | a rotational twisting force. |
Truss | supporting lattice work added to create very tall beams that add rigidity to an existing beam greatly increasing the ability to dissipate the compression and tension. |
Deck-Stiffening trusses | a supporting truss system beneath the 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. |
Dampners | a technique used to interrupt the resonant waves. |