Bridge Bearings and Connections Quiz

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Questions and Answers

What type of movement does a pin bearing permit?

Rotational movement (correct)

Vertical movement

Lateral movement

Longitudinal movement

What is the main function of bridge bearings?

Supporting the weight of the traffic loads

Preventing movements and vibrations in the bridge structure

Transferring forces between the bridge superstructure and substructure (correct)

Controlling the temperature of the bridge deck

What type of bearing contains a curved surface to accommodate translational movements?

Line rocker bearing

Hinged rocker bearing (correct)

Roller bearing

Pin bearing

What seismic protection feature do recent bridge bearings have?

Energy arrest and dissipation during earthquakes Signup and view all the answers

What is the composition of roller bearings?

One or more rollers between two parallel steel plates Signup and view all the answers

What type of forces do bridge bearings transfer between the bridge superstructure and substructure?

Traffic and dead loads Signup and view all the answers

What is the primary function of a pin bearing in a bridge structure?

Permits rotational movement and prevents longitudinal movement Signup and view all the answers

Which type of bridge bearing contains a curved surface to accommodate translational movements?

Hinged rocker bearing Signup and view all the answers

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

Facilitate both translations and rotations Signup and view all the answers

What seismic protection feature do recent bridge bearings act as?

Energy dissipators during earthquakes Signup and view all the answers

How do roller bearings differ from pin bearings in a bridge structure?

Roller bearings permit both rotational and translational movements, while pin bearings permit only rotational movement Signup and view all the answers

What is the function of a rocker bearing in a bridge structure?

To contain a curved surface that accommodates the translational movements Signup and view all the answers

What is the primary purpose of existing bridge bearings?

To accommodate and transfer dynamic forces and vibrations without causing wear or destruction to the substructure Signup and view all the answers

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

To facilitate both rotations and translations in the longitudinal direction Signup and view all the answers

What type of support settlement can be controlled by bridge bearings?

Vertical support settlement Signup and view all the answers

Study Notes

Bridge Bearing Functions and Types

Pin bearings allow rotational movement, accommodating angular displacements in bridge structures.
The primary function of bridge bearings is to transfer loads and movements between the bridge superstructure and substructure while allowing for necessary flexibilities.
Rocker bearings, designed with a curved surface, can accommodate translational movements hence facilitating horizontal adjustments during load variations.
Roller bearings consist of cylindrical rollers that facilitate horizontal movement, reducing friction and wear.

Seismic Protection Features

Recent bridge bearings incorporate seismic protection features that help absorb and dissipate energy during earthquakes, enhancing the structure's resilience.

Force Transfer and Settlement Control

Bridge bearings transfer vertical and horizontal loads from the superstructure to the substructure, ensuring structural stability.
Bridge bearings help control support settlement, allowing for adjustments in response to ground movement or structural loads.

Comparison of Bearing Types

Unlike roller bearings, pin bearings do not allow translational movement; they mainly provide rotational freedom.
Roller bearings actively reduce friction to facilitate smooth movement across joints in a bridge structure, while pin bearings focus primarily on rotation.

Overview of Bearing Functions

The main purpose of existing bridge bearings is to ensure safety and durability by managing forces and movements effectively across the bridge system.

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Description

Test your knowledge about bridge bearings, their functions, and the causes of movements in bridge structures. This quiz covers topics such as the transfer of forces, movement causes, and the functions of bridge bearings.