What is a Extradosed bridge used for?
In an extradosed bridge, the deck is directly supported by resting on part of the tower, so that in close proximity to the tower the deck can act as a continuous beam.
Are cable-stayed bridges stronger than suspension bridges?
The following are key advantages of the cable-stayed form: much greater stiffness than the suspension bridge, so that deformations of the deck under live loads are reduced. can be constructed by cantilevering out from the tower – the cables act both as temporary and permanent supports to the bridge deck.
Why is a cable-stayed bridge better than a suspension bridge?
They require much less steel cable and use more precast concrete sections, which accelerates construction. 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 1 disadvantage to 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.
What is the main difference between cable-stayed and suspension 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.
Is a cable-stayed bridge a suspension bridge?
Cable stayed bridge is similar to the suspension bridge, but It is different, in this bridge support cables are directly tied with support towers. It allows cantilever construction from inside to out easily.
When would you use a cable-stayed bridge?
The tower of a cable-stayed bridge is responsible for absorbing and dealing with compressional forces. The cables attach to the roadway in various ways. For example, in a radial pattern, cables extend from several points on the road to a single point at the tower, like numerous fishing lines attached to a single pole.
What are the pros of a cable-stayed bridge?
Advantages of Cable-stayed bridge Cable-stayed bridges are a popular choice as they offer all the advantages of a suspension bridge but at a lesser cost for spans of 500 to 2,800 feet (152 to 853 meters). They require less steel cable, are faster to build and incorporate more precast concrete sections.
How much weight can a cable-stayed bridge hold?
Bridge Deflection, Load Capacity 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).
Where is the most famous cable-stayed bridge?
1. The Sutong Bridge arcs across a 6-kilometer-wide stretch of the mighty Yangtze River 50 miles upstream from Shanghai. Measuring 8.2 km overall, its main span is the current world record-holder for a cable-stayed bridge.
What is the difference between cable-stayed bridge and extradosed bridge?
“ Extradosed bridge ” has stiffer and stronger deck and its cables are connected to the deck further from the towers which are also lower than those of standard cable-stayed bridges. “ Cable-stayed cradle-system Bridge ” is one of the newest variants.
How long is a 121 extradosed cable stayed bridge?
CHAPTER 6: ENGINEERING CONCEPTS 121 Extradosed/Cable-Stayed 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.
What does extradosed bridge look like?
Visually, extradosed bridges typically have the appearance of a cable-stayed bridge with very short towers (pylons), with cable stays of shallow angle that may not extend along the full length of the deck, and (frequently) with a more substantial deck superstructure.
How do extradosed bridges cross the river?
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.