How does a Extradosed bridge work?
The extradosed/cable-stayed bridge uses a series of cable-supported spans to cross the river with equal span lengths of approximately 300 feet, as shown in Figure 6.7. The superstructure would be supported by cables above the deck anchored at one end to a central pylon and at the other end to the edge of the deck.
What do you mean by Extradosed bridge?
An extradosed bridge employs a structure that combines the main elements of both a prestressed box girder bridge and a cable-stayed bridge.
What cables support bridges?
A cable-stayed bridge has one or more towers (or pylons), from which cables support the bridge deck. A distinctive feature are the cables or stays, which run directly from the tower to the deck, normally forming a fan-like pattern or a series of parallel lines.
How safe is the cable-stayed bridge?
Finite element analysis results show that cable-stayed and extradosed bridges are sufficiently redundant at safety factors ranging from 2.3 to 2.5 and 1.67, respectively under normal loading conditions.
How many cable bridges are there in India?
There are number of Cable-Stayed Bridges in India and 5 Cable-Stayed Bridges Under Construction.
Why are cables used in bridges?
Compared to the traditional suspension bridge design, the cables involved with a cable stayed bridge are capable of handling more pressure. That provides the deck with a greater level of consistency for travel. It keeps its shape better, even under heavy live loads, because the overall design has more rigidity.
What is a disadvantage of a cable-stayed bridge?
List of the Cons of a Cable Stayed Bridge. 1. It can be an unstable design in certain environments. A cable stayed bridge should not be installed in a region that is known to experience high wind speeds on a consistent basis.
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).
Which is the largest cable bridge in India?
Vidyasagar Setu also known as the Second Hooghly Bridge, is a toll bridge over the Hooghly River in West Bengal, India, linking the twin cities of Kolkata (previously known as Calcutta) and Howrah.
Which is the biggest cable bridge in India?
It is the extradosed bridge with the longest spans in India, 144 m (472 ft) long….
| 3rd Narmada Bridge | |
|---|---|
| Material | Steel, Cement, Cables, Alloy |
| Total length | 1,344 m (4,409 ft) |
| Width | 22.8 m (75 ft) |
| Longest span | 144 m (472 ft) |
What are the disadvantages 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.
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 difference between a stay cable bridge and extradosed bridge?
Cable-stayed and extradosed bridges are thought to be identical structures because both bridges use stay cables for reinforcement.
What is the target reliability index for extradosed cables?
It is observed that the safety factors of 2.25 and 1.66 yield the target reliability index of 4.0 and failure probability of 10 −5 for stay cables C1 and EDC1, respectively. This also elucidates that the safety factor of 1.66 for extradosed bridges yields same reliability index as the safety factor of 2.25 for cable-stayed bridges. Table 4.
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