Bridge Bearings and Movements in Steel Structures

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15 Questions

What is the primary function of bridge bearings?

To transfer forces between the bridge superstructure and substructures

Which of the following is NOT a cause of movements affecting bridge bearings?

Steel corrosion

What type of movement does a pin bearing permit?

Rotational movement

What is the function of a rocker bearing?

To accommodate translational movements

What is the primary purpose of roller bearings in a bridge?

To support high loads

What is the primary role of bridge bearings?

To transfer forces between the bridge superstructure and the substructure

Which type of bridge bearing permits rotational movement while preventing longitudinal movement?

Pin bearing

What is the function of a roller bearing in a bridge?

To support high loads

What is the main purpose of a hinged rocker bearing in a bridge?

To accommodate translational movements

Which of the following is NOT a cause of movements affecting bridge bearings?

Concrete color

What is the primary purpose of a line rocker bearing in a bridge?

To accommodate translational movements

Which type of bridge bearing is designed to act as a seismic protector during earthquakes?

Roller bearing

What is the main function of a pin bearing in a bridge?

To prevent longitudinal movement

Which of the following causes movements affecting bridge bearings due to changes in temperature?

Shrinkage and creep

What is the primary role of steel bridge bearings?

To transfer forces between the superstructure and substructure

Study Notes

Bridge Bearings

  • The primary function of bridge bearings is to transfer loads from the superstructure to the substructure while allowing for movements caused by various factors.

Movements Affecting Bridge Bearings

  • Causes of movements affecting bridge bearings include temperature changes, wind, earthquakes, and vehicular loads.
  • Settlement of the foundation or pier is NOT a cause of movements affecting bridge bearings.

Types of Bridge Bearings

  • Pin bearings permit rotational movement while preventing longitudinal movement.
  • Rocker bearings permit rotational and translational movements.
  • The function of a rocker bearing is to permit rotational and translational movements.
  • Roller bearings permit longitudinal movement while preventing rotational movement, and their primary purpose is to allow for the translation of the superstructure.
  • Hinged rocker bearings permit rotational movement while preventing longitudinal movement, and their main purpose is to allow for the rotation of the superstructure.
  • Line rocker bearings permit rotational movement while preventing longitudinal movement, and their primary purpose is to allow for the rotation of the superstructure.
  • Seismic bearings are designed to act as seismic protectors during earthquakes.

Functions of Bridge Bearings

  • The primary role of steel bridge bearings is to transfer loads from the superstructure to the substructure while allowing for movements caused by various factors.
  • The main function of a pin bearing in a bridge is to permit rotational movement while preventing longitudinal movement.

This lecture covers the introduction and roles of bridge bearings in steel structures, including the causes of movements such as shrinkage, traffic loads, and temperature change. The functions of bridge bearings in connecting the superstructure to substructures are also discussed.

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