An extradosed bridge employs a structure that combines the main elements of both a prestressed box girder bridge and a cable-stayed bridge….Extradosed bridge.
Table of Contents
What is a extradosed bridge used for?
An extradosed bridge employs a structure that combines the main elements of both a prestressed box girder bridge and a cable-stayed bridge….Extradosed bridge.
| Diagram of an extradosed bridge | |
|---|---|
| Ancestor | Box girder bridge, cable-stayed bridge |
| Carries | Pedestrians, vehicles, light rail, heavy rail |
| Span range | Medium |
What is pre stressed girder bridge?
Precast prestressed girders are a type of concrete girder that facilitates the rapid construction of a bridge using girders fabricated off-site and then transported and erected into place at the job site.
What are the advantages and disadvantages of a cable-stayed bridge?
Although a cable-stayed bridge can help to provide a consistently supportive deck when there are crosswinds present over a span, this option does not work well when the speed of that wind remains consistently high. This disadvantage occurs because of the rigidity that the cables provide for the overall structure.
What is a balanced cantilever bridge?
The Balanced Cantilever Method refers to a construction method that does not install scaffolding systems under the bridge and completes the superstructure of the bridge by sequentially joining the segments to form a span by post-tensioning and balancing them left and right from each pier using special erection …
How does pre stressed concrete beam work?
The principle behind prestressed concrete is that compressive stresses induced by high-strength steel tendons in a concrete member before loads are applied will balance the tensile stresses imposed in the member during service.
What is pre stressed beam?
A concrete beam is “prestressed’ because stress is created before, or “pre,” the actual use of the beam when the working stress is applied.
How much weight can a cable-stayed bridge hold?
The maximum upward deflection is 5.8 ft (1.8 m). The maximum transverse deflection, at center span is 27.7 ft (8.4 m). Live load capacity per lineal foot is 4,000 lbs (1,814.4 kg).
What’s the difference between a suspension bridge and a cable-stayed bridge?
The difference lies in how the cables are connected to the towers. In suspension bridges, the cables ride freely across the towers, transmitting the load to the anchorages at either end. In cable-stayed bridges, the cables are attached to the towers, which alone bear the load.
Which is better suspension bridge or cable-stayed bridge?
In short, cable-stayed bridges bear the road-deck weight differently, are faster to build and require less construction materials than suspension bridges.
What is the biggest disadvantage of a cable-stayed bridge?
List of the Cons of a Cable Stayed Bridge
- It can be an unstable design in certain environments.
- It has a maximum length.
- It can be a bridge design that is difficult to inspect.
- It can be susceptible to corrosion.
- It is only advantageous for short or medium distance needs.
Why are cantilever bridges bad?
Disadvantages Of Cantilever Bridges A cantilever bridge requires a heavier structure to take care of its own stability by creating stability between compressive and tensile forces. 2. During the construction of Cantilever bridges, they experience a high level of tension which is known as negative moments. 3.
What is disadvantage of a cantilever?
Although cantilever bridges typically last for years, there is a higher chance of failure when bridges are not attached to the sturdier teeth found at the back of the mouth. Damage may occur. Because they are only anchored on one side, there is a slightly higher risk of cracking or debonding than with other bridges.
Which river has longest bridge?
Dr. Bhupen Hazarika Bridge is the longest bridge in India, over the River Brahmaputra, in Assam.
| Serial no. | Name | Type |
|---|---|---|
| 1 | Dhola Sadiya bridge | Road |
| 2 | Dibang River Bridge | Road |
| 3 | Mahatma Gandhi Setu | Road |
| 4 | Bandra-Worli Sea Link (BWSL) | Road |
What are the two methods of pre stressing concrete called?
In prestressed concrete structures, prestress is introduced by stretching steel wire and anchoring them against concrete.
Does prestressed concrete crack?
It should be noted that cracks are not totally avoidable in prestressed concrete structures, but their presence destroy the integrity of the structure and influence the serviceability and sometimes carrying capacity of the structure.
What are the advantages of pre stressed concrete?
Prestressing can reduce the volume of concrete required in construction, lowering the use and transportation of materials, as well as boosting durability and service life. Concrete is intrinsically resistant to compressive stresses, but its resistance to tension is much lower.