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Posted by don gunderson 2 years ago In:

don gunderson
don gunderson Asked:

Bridge construction why do modern bridges have curves in them?

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Rosie
Rosie Answered:

The arc is stronger and can carry more weight than a straight beam.

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charlie2911
charlie2911 Answered:

Very true -arcs ARE stronger. -But not exactly modern, Europe is filled with Roman viaducts made with arcs in each section Cool

What is truth -
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Mark 'n Starla Trania
Mark 'n Starla Trania Answered:

Actually, bridges all have curves in them.  In the winter, they shrink and that puts a lot of strain on the abutments and cables.  In the summer they expand and that makes a lot of slack cables and crumbles abutments.

We put in expansion grates and other things to compensate for cold and hot weather, but a curve at each end or one through the middle means we have a lot less heat hassle.

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kristijohnson61
kristijohnson61 Answered:

Tensional strength of arch bridges, on the other hand is almost negligible. The natural curve of the arch and its ability to dissipate the force outward to reduce the voltage significantly below the curve.

http://www.millerconstruction.com/

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