15 Questions
What is a disadvantage of the arch bridge design?
Relatively heavy deadweight, leading to high horizontal reaction
What type of forces is the arch bridge mainly subjected to?
Axial compression load and bending moment
Which structural system is known for being highly rigid with low deflections and transferring moments to the abutments?
Fixed arch
What type of arch is often used for long spans?
Hinged arch
What is the maximum span for a solid slab according to the given text?
20 m
In a tied arch bridge, how are the horizontal forces resisted?
By the tie instead of the foundations
Which type of slab has lower dead loads and can be economic for a span up to 25 m?
Voided slab
Which type of bridge has larger span capacity than a simply supported bridge and lower than a continuous span bridge?
Cantilever bridge
For simply supported spans with constant depth, what is the span/depth ratio according to the given text?
22 to 25
What is the span capacity range for a voided slab?
Up to 25 m
What type of structural system is widely used for short spans and reduces the bending for intermediate spans?
Cantilever bridge
Which type of bridge has a relatively large span capacity and reduces bending for intermediate spans?
Cantilever bridge
What is the maximum span for a beam/slab system according to the given text?
25 m
Which structural system is known for high tortional rigidity and smaller structure depth than beams?
Solid slab
What is the span/depth ratio for simply supported spans with constant depth according to the given text?
20 to 25
Study Notes
Bridge Design and Structural Systems
- A disadvantage of the arch bridge design is its limited versatility in adapting to different sites and foundation conditions.
Forces and Structural Systems
- Arch bridges are mainly subjected to compressive forces.
- The arch structural system is known for being highly rigid with low deflections and transferring moments to the abutments.
Arch Types and Span Capacity
- The parabolic arch is often used for long spans.
- The maximum span for a solid slab is 15-20 m.
Tied Arch Bridges
- In a tied arch bridge, the horizontal forces are resisted by the ties.
Slab Types and Economy
- The voided slab has lower dead loads and can be economic for a span up to 25 m.
Bridge Span Capacity
- The continuous span bridge has a larger span capacity than a simply supported bridge and lower than a tied arch bridge.
- The span capacity range for a voided slab is 20-40 m.
- The maximum span for a beam/slab system is 20-30 m.
Simply Supported Spans
- For simply supported spans with constant depth, the span/depth ratio is 15-20.
Structural Systems and Rigidity
- The beam structural system is widely used for short spans and reduces the bending for intermediate spans.
- The tied arch bridge has a relatively large span capacity and reduces bending for intermediate spans.
- The box girder structural system is known for high torsional rigidity and smaller structure depth than beams.
Learn about the concept and configuration of arch bridges, including how they transfer traffic loads, handle material properties, and impact driving conditions. Explore the advantages and disadvantages of arch bridges in terms of load distribution, rigidity, and durability.
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