What are the characteristics of suspension bridges?

The obvious vibration phenomenon of Humen Bridge on the 5th was judged as "vortex vibration phenomenon" by the expert group, indicating that the suspension bridge structure is safe and reliable and will not affect the subsequent use of Humen Bridge. However, before the vortex vibration phenomenon is over, it is impossible to determine the time to resume traffic. Because the swaying bridge deck is easy to cause traffic accidents. So, what are the characteristics of suspension bridges? Let's take a look at Bian Xiao!

Characteristics of suspension bridge

The characteristic of suspension bridge is that it can span a longer distance with less materials than other bridge structures. Suspension bridge is flexible, so it is suitable for strong winds and earthquake areas.

Suspension bridges can be built relatively high, allowing ships to pass under them. When building a bridge, there is no need to build a temporary pier in the center of the bridge, so the suspension bridge can be built in deeper or more urgent water.

However, suspension bridge is not suitable as a heavy railway bridge; Moreover, the suspension bridge is not firm, and traffic must be temporarily suspended in the case of strong wind. For example, vortex vibration of Humen Bridge is prohibited.

In addition, the pylon of suspension bridge exerts great force on the ground. If the ground itself is soft, the foundation of the tower must be large and expensive. Moreover, the suspension cables of suspension bridges are not easy to replace after corrosion.

Suspension bridge was invented at the beginning of19th century, which is mainly composed of long-span and super-long-span highway bridges. However, suspension bridges have a great disadvantage, such as low stiffness and easy vibration. This is the reason why the deck of Humen Bridge vibrates.