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How Does Thermal Expansion Affect Bridges?

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by

John Luke Miller

on 28 February 2014

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Transcript of How Does Thermal Expansion Affect Bridges?

How Does Thermal Expansion Affect Bridges?
As the temperature of an area in which a bridge is located increases, the bridge increases in size.
How Does Thermal Expansion Affect Bridges?
Problems:
Due to thermal expansion, a bridge can be faulty in two different ways; it can expand the under beams and cause the length to increase until it falls off of the outer side of side pillars> or < the steal cables can increase in length until they sag causing an unsupported area in the center of the bridge. This causes the bridge to collapse in the center.
Solutions:
There are two methods of solving problems on bridges inked to thermal expansion.
1. Thermal Expansion Gaps are present in the horizontal structure to allow for an increase in length.
2. Thermal Expansion Joints, which allow for the bridge to slope at an up or down angle.
Examples of TE Gaps:
Examples of TE Joints:
What is Affected?
All of the metal materials are affected the most from thermal expansion, and happen to be the most important materials in a bridge. The under beam steal, steal cables, inner brass or copper support pillars, and re- bar will all expand and cause a bridge to collapse.
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