THE A RCH
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Transcript of THE A RCH
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THE ARCH
Universidad Simon BolivarIngles IIProf. Marianela NajulBy Felix Vivas and Adriana Ruiz
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Content
•Historical Origins
•Parts of the Arch
•Structural Behavior
•Classification of Arches
•The Arch Actually
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THE ARCH IN THE ANTIQUITY: BEAM VS. ARCH
•Beam -> Arch•Produces tensile forces which couldn’t be
absorbed by stone, the most usual material at that antiquity
•Stone -> week in tension
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STRUCTURAL BEHAVIOR OF AN ARCHTransit of the loads Vertical loads
Horizontal loadsBoth of them act on the arch’s support
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•Stone resists compression very well, but it is week to traction.
•The result is that each voussoir works only in compression, and it allows a distance much bigger between columns than beams do.
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Classifications of the arches
according to their
guideline
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PARABOLIC•Used by Antoni Gaudi and modern architects (sthetics
motives).•It is the most difficult to build because each
voussoir is different
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If we turn a parabolic arch around, we obtain the guideline for a suspension bridge
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Circumference is the only curve with a constant curvature;
this makes it easier and cheaper to build.
It is the most used since Antique Romans.
CIRCUMFERENCE
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OJIVAL ARCH•Produces the minimum possible of horizontal loads in the supports•The voussoirs can all have the same shape, just like a
circumference-shaped arch•It is resistant and easy to build
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Horseshoe Arch
Tudor Arch
OTHER ARCHES…
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“Throught the arch, the matter defeats itself” Cayo Lacer, author of the Alcatara’s
bridge