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Bridges
Stack #2474721
Question | Answer |
---|---|
1. Arch bridge | A type of bridge that relies on a curved, semi-circular structure for support. |
2. Beam bridge | A fixed structure consisting of a series of steel or concrete bars placed parallel to traffic and supporting the roadway directly on their top flanges |
3. Suspension bridge | A bridge in which the weight of the deck is supported by vertical cables suspended from larger cables that run between towers and are anchored in abutments at each end. |
4. Cable-stayed bridge | A bridge in which the weight of the deck is supported by a number of cables running directly to one or more towers. |
5. Cantilever bridge | A bridge formed by two projecting beams or trusses that are joined in the center by a connecting member and are supported on piers and anchored by counterbalancing members |
6. Truss Bridge | A bridge in which the loads are supported by trusses. |
What is meant by the span of a bridge? | The horizontal distance between two supports of the bridge |
How long is the longest span in the world? | 6,532 feet |
How long is the longest bridge in the world? | Over 102 miles long |
What is the most common shape used in bridge building? Why? | Triangle because of the Strength to cost ratio |
What happens to the live weight as it passes over a bridge? | The weight gets transferred through the members to the supports and back to the ground. |
What are the two most important things to take into consideration when deciding on a bridge design? | Cost and style |
What does it mean if a bridge member is under tension? | The member that is under tension is being pulled apart |
What does it mean if a bridge member is under torsion? | The member is being twisted. |
What does it mean if a bridge member is under compression? | The bridge member is being pushed together. |
Why would an engineer consider a bridge’s appearance when choosing a bridge design? | A well thought out bridge design will flow and add beauty to the surrounding area |