What helps a cable-stayed bridge stay up?

cable-stayed bridge, bridge form in which the weight of the deck is supported by a number of nearly straight diagonal cables in tension running directly to one or more vertical towers. The towers transfer the cable forces to the foundations through vertical compression.

How do dampers work on a bridge?

Similar to systems found in buildings, direct acting damping can be used in bridge applications to absorb wind, seismic, and pedestrian energy. Fluid viscous dampers are installed to provide damping into the system and, consequently, reduce force and displacement demands.

What are 2 characteristics of a cable-stayed bridge?

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.

What are the key components of a cable-stayed bridge?

The main elements of a cable-stayed bridge are towers or pylons, deck girder(s), cable-stays, anchorages, and foundations. Tower and pylon are interchangeable terms; lighter, slender towers are often called pylons.

How much weight can a cable-stayed bridge hold?

Live load capacity per lineal foot is 4,000 lbs (1,814.4 kg). The three maximum deflections noted above at the center of the suspension bridge are due to the following loading conditions: The transverse deflection is due to a sustained transverse wind load.

Do cable-stayed bridges have anchorages?

Cable-stayed bridges differ from their suspension predecessors in that they don’t require anchorages, nor do they need two towers. Instead, the cables run from the roadway up to a single tower that alone bears the weight. Not all bridges requires great hunks of steel and concrete though.

What is bridge damping?

Damping in a bridge has a remarkable effect on the magnitude and duration of the bridge’s dynamic response, as does the bridge’s natural frequency. The viscous damping ratio is an important parameter that determines the dynamic behavior of the bridge in the most adaptive viscous damping model.

Why are building built with dampers?

By adding a damper into the structure with base isolators, seismic energy can be further absorbed as the building moves, which will help to limit the amount a building sways, helping to better protect the building from damage and to reduce the inconvenience to occupants and damage to contents.

What are the disadvantages 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.

What is the 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.

How do vibration dampers work on stay cables?

As a stay cable gets longer (80 meters or more), it is subject to increased risk of vibrations: these vibrations may alarm users and may cause the cable to wear out over time. The dampers’ role is to dissipate kinetic energy. VSL has developed two vibration damping systems that are both highly efficient and durable, with low maintenance costs.

What is the best passive damper for long-span cables?

The VSL Friction Damper is the most efficient passive damper available for use on long-span stay cables requiring high damping levels. The VSL Rubber Damper is a modular passive damper designed for medium-span stay cables.

Can VSL SSI 2000 dampers be used as external dampers?

Versatility of dampers for cable-stayed bridges Both damper types are optimized for use as internal dampers, fully protected inside the VSL SSI 2000 anti-vandalism pipe, but they can also easily be adapted for retrofitting existing cables of any type or for use as external dampers if required.

What happens when a stay cable gets too long?

As a stay cable gets longer (80 meters or more), it is subject to increased risk of vibrations: these vibrations may alarm users and may cause the cable to wear out over time. The dampers’ role is to dissipate kinetic energy.