From Wikipedia, the free encyclopedia
(Redirected from Round arch)
Variations of the semicircular arch

Semicircular arch is an arch with intrados (inner surface) shaped like a semicircle. [1] [2] This type of arch was adopted and very widely used by the Romans, thus becoming permanently associated with the Roman architecture. [3]

Terminology

When the arch construction involves the Roman techniques (either wedge-like stone voussoirs or thin Roman bricks), it is known as a Roman arch. [4] The semicircular arch is also known as a round arch. [5] [6]

Description

Stilted arch made of bricks

The rise (height) of a round arch is limited to 12 of its span, [7] so it looks more "grounded" than a parabolic arch [3] or a pointed arch. [7] Whenever a higher semicircular arch was required (for example, for a narrow arch to match the height of a nearby broad one), either stilting or horseshoe shape were used, thus creating a stilted arch (also surmounted [8]) and horseshoe arch respectively. [9] These "shifts and dodges" were immediately dropped once the pointed arch with its malleable proportions was adopted. [7] Still, "the Romanesque arch is beautiful as an abstract line. Its type is always before us in that of the apparent vault of heaven, and horizon of the earth" ( John Ruskin, " The Seven Lamps of Architecture"). [10]

When the architecture of the building dictates the rise of he arch to be less that 12 of its span (for example, in Roman residential construction), a segmental arch with a rounded shape that is less than a semicircle can be used. [11]

History and associated styles

The popularity of the semicircular arch is based on simplicity of its layout and construction, [12] not superior structural properties. The sides of this arch swing wider than the perfect funicular curve and therefore experience a bending moment with the force directed outwards. [13] To prevent buckling, heavy surcharge (fill), so called spandrel, needs to be applied outside of the haunches. [12]

In addition to the Imperial Roman construction, round arches are also associated with Byzantine, Romanesque (and Neo-Romanesque), Renaissance [14] and Rundbogenstil styles. While the semicircular arch was known in the Greek architecture, it mostly played there a decorative, not structural, role. [15]

Gallery

References

  1. ^ Oxford University Press 2006a.
  2. ^ Kurtz 2007, p. 34.
  3. ^ a b Sandaker, Eggen & Cruvellier 2019, p. 445.
  4. ^ Oxford University Press 2006b.
  5. ^ Oxford University Press 2006c.
  6. ^ Sturgis & Davis 2013, p. 112.
  7. ^ a b c Bond 1905, p. 265.
  8. ^ "surmounted arch". Merriam-Webster.com Dictionary.
  9. ^ Bond 1905, p. 262.
  10. ^ Bond 1905, p. 261.
  11. ^ DeLaine 1990, p. 417.
  12. ^ a b Mark 1996, p. 387.
  13. ^ Sandaker, Eggen & Cruvellier 2019, p. 464.
  14. ^ Sturgis & Davis 2013, p. 115.
  15. ^ DeLaine 1990, p. 412.

Sources

From Wikipedia, the free encyclopedia
(Redirected from Round arch)
Variations of the semicircular arch

Semicircular arch is an arch with intrados (inner surface) shaped like a semicircle. [1] [2] This type of arch was adopted and very widely used by the Romans, thus becoming permanently associated with the Roman architecture. [3]

Terminology

When the arch construction involves the Roman techniques (either wedge-like stone voussoirs or thin Roman bricks), it is known as a Roman arch. [4] The semicircular arch is also known as a round arch. [5] [6]

Description

Stilted arch made of bricks

The rise (height) of a round arch is limited to 12 of its span, [7] so it looks more "grounded" than a parabolic arch [3] or a pointed arch. [7] Whenever a higher semicircular arch was required (for example, for a narrow arch to match the height of a nearby broad one), either stilting or horseshoe shape were used, thus creating a stilted arch (also surmounted [8]) and horseshoe arch respectively. [9] These "shifts and dodges" were immediately dropped once the pointed arch with its malleable proportions was adopted. [7] Still, "the Romanesque arch is beautiful as an abstract line. Its type is always before us in that of the apparent vault of heaven, and horizon of the earth" ( John Ruskin, " The Seven Lamps of Architecture"). [10]

When the architecture of the building dictates the rise of he arch to be less that 12 of its span (for example, in Roman residential construction), a segmental arch with a rounded shape that is less than a semicircle can be used. [11]

History and associated styles

The popularity of the semicircular arch is based on simplicity of its layout and construction, [12] not superior structural properties. The sides of this arch swing wider than the perfect funicular curve and therefore experience a bending moment with the force directed outwards. [13] To prevent buckling, heavy surcharge (fill), so called spandrel, needs to be applied outside of the haunches. [12]

In addition to the Imperial Roman construction, round arches are also associated with Byzantine, Romanesque (and Neo-Romanesque), Renaissance [14] and Rundbogenstil styles. While the semicircular arch was known in the Greek architecture, it mostly played there a decorative, not structural, role. [15]

Gallery

References

  1. ^ Oxford University Press 2006a.
  2. ^ Kurtz 2007, p. 34.
  3. ^ a b Sandaker, Eggen & Cruvellier 2019, p. 445.
  4. ^ Oxford University Press 2006b.
  5. ^ Oxford University Press 2006c.
  6. ^ Sturgis & Davis 2013, p. 112.
  7. ^ a b c Bond 1905, p. 265.
  8. ^ "surmounted arch". Merriam-Webster.com Dictionary.
  9. ^ Bond 1905, p. 262.
  10. ^ Bond 1905, p. 261.
  11. ^ DeLaine 1990, p. 417.
  12. ^ a b Mark 1996, p. 387.
  13. ^ Sandaker, Eggen & Cruvellier 2019, p. 464.
  14. ^ Sturgis & Davis 2013, p. 115.
  15. ^ DeLaine 1990, p. 412.

Sources


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