the a rch
DESCRIPTION
THE A RCH. Universidad Simon Bolivar Ingles II Prof. Marianela N ajul By Felix Vivas and Adriana Ruiz. Content. Historical Origins Parts of the Arch Structural Behavior Classification of Arches The Arch Actually. THE ARCH IN THE ANTIQUITY: BEAM VS. ARCH Beam -> Arch - PowerPoint PPT PresentationTRANSCRIPT
THE ARCH
Universidad Simon BolivarIngles IIProf. Marianela NajulBy Felix Vivas and Adriana Ruiz
Content
•Historical Origins
•Parts of the Arch
•Structural Behavior
•Classification of Arches
•The Arch Actually
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
STRUCTURAL BEHAVIOR OF AN ARCHTransit of the loads Vertical loads
Horizontal loadsBoth of them act on the arch’s support
•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.
Classifications of the arches
according to their
guideline
PARABOLIC•Used by Antoni Gaudi and modern architects (sthetics
motives).•It is the most difficult to build because each
voussoir is different
If we turn a parabolic arch around, we obtain the guideline for a suspension bridge
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
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
Horseshoe Arch
Tudor Arch
OTHER ARCHES…
“Throught the arch, the matter defeats itself” Cayo Lacer, author of the Alcatara’s
bridge