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Bridge Bearings and Their Functions

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Questions and Answers

What is the primary function of bridge bearings?

To support lateral loads only

To connect the bridge superstructure to the substructure (correct)

To resist temperature changes

To prevent any movement of the bridge structure

Which of the following is a cause of movements in bridge bearings?

Birds nesting under the bridge

Noise from traffic

Paint color on the bridge

Shrinkage and creep (correct)

What is the function of roller bearings in a bridge structure?

To connect the superstructure to the substructure

To support high loads in a linear configuration (correct)

To contain a curved surface for translational movements

To permit rotational movement and prevent longitudinal movement

What is the role of pin bearings in a bridge structure?

To permit rotational movement and prevent longitudinal movement Signup and view all the answers

How do recent bridge bearings act during earthquakes?

They act as seismic protectors that arrest and dissipate energy Signup and view all the answers

What is the main function of bridge bearings?

To connect the bridge superstructure to the substructure Signup and view all the answers

Which type of bridge bearing permits rotational movement but prevents longitudinal movement?

Rocker bearing Signup and view all the answers

What is the role of recent bridge bearings during earthquakes?

To arrest and dissipate energy Signup and view all the answers

What is the purpose of a roller bearing in a bridge structure?

To accommodate translational movements Signup and view all the answers

Which force do bridge bearings transfer without causing wear or destruction to the substructure?

Dynamic forces and vibrations Signup and view all the answers

Study Notes

Bridge Bearings

The primary function of bridge bearings is to transfer forces from the bridge superstructure to the substructure while allowing for desired movements.

Causes of Movements in Bridge Bearings

Movements in bridge bearings are caused by:
- Thermal expansion and contraction
- Shrinkage and creep of concrete
- Settlement of the substructure
- Seismic activity

Functions of Bridge Bearings

Roller bearings in a bridge structure allow for longitudinal movement while restricting rotational movement.
Pin bearings in a bridge structure permit rotational movement but prevent longitudinal movement.

Recent Bridge Bearings During Earthquakes

Recent bridge bearings are designed to act as a seismic isolation system during earthquakes, reducing the transfer of seismic forces to the substructure.

Types of Bridge Bearings

Pin bearings permit rotational movement but prevent longitudinal movement.

Forces Transferred by Bridge Bearings

Bridge bearings transfer vertical and horizontal forces from the bridge superstructure to the substructure without causing wear or destruction to the substructure.

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Description

Learn about the roles and functions of bridge bearings in transferring forces between the bridge superstructure and substructures. Understand the causes of movements and the important function of connecting the bridge superstructure.