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RADIUS CURVES [5 fiches]

Fiche 1 2024-01-04

Anglais

Subject field(s)
  • Road Design
  • Road Transport
  • Rail Transport
CONT

In connecting straight(tangent) sections of roadway with a horizontal curve, several options are available. The most obvious of these is the simple circular curve, which is just a curve with a single, constant radius. Other options include reverse curves, compound curves, and spiral curves. Reverse curves generally consist of two consecutive curves that turn in opposite directions. They are used to shift the alignment of a highway laterally. The curves used are usually circular and have equal radii.

Terme(s)-clé(s)
  • S-curve

Français

Domaine(s)
  • Conception des voies de circulation
  • Transport routier
  • Transport par rail
OBS

courbe en S : terme recommandé par l'OLF [Office de la langue française].

Espagnol

Campo(s) temático(s)
  • Diseño de carreteras
  • Transporte por carretera
  • Transporte ferroviario
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Fiche 2 2023-12-05

Anglais

Subject field(s)
  • Freeways and Expressways
  • Road Networks
CONT

Sharp horizontal curves, particularly on interchange ramps, have been found by a number of highway agencies to require warning signs to advise heavy vehicles of safe operating speeds.... Thirty-seven percent of highway agencies had found a need to reconstruct particular ramp curves to change their radius or superelevation.

Français

Domaine(s)
  • Autoroutes et voies rapides
  • Réseaux routiers

Espagnol

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Fiche 3 2021-12-21

Anglais

Subject field(s)
  • Scientific Measurements and Analyses
  • Fish
DEF

A clear variation in the angle of the corpus calcareum [that] corresponds to a growth rate acceleration in [fish].

CONT

Recent declines in abundance of skates... have heightened the need for validated age and growth estimates... skate vertebral centra collected seasonally... were sectioned using a mass processing method, then used to reconstruct growth in each species.... Total counts were obtained by summing visible and estimated band counts. Growth curves were then fitted to all length-at-age data including sections deemed unreadable near the focus. The location of the birth band(BB) in each species was confirmed by comparing suspected birth band radius(BR) measurements with [vertebral radius(VR) ] measurements of available late-term embryos... and/or early young-of-the-year fish... Regressions between VR and [total length] for each species, along with published hatch lengths, were also used to verify the location of the BB along the corpus calcareum of each section...

OBS

Birthmarks are usually represented by an angle change along the centrum face of whole vertebrae or along [the] intermedialia-corpus calcareum interface with an associated ring on the corpus calcareum in sectioned centra, but this feature may not be distinct in either.

Terme(s)-clé(s)
  • birthband
  • birth mark

Français

Domaine(s)
  • Mesures et analyse (Sciences)
  • Poissons

Espagnol

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Fiche 4 1999-10-25

Anglais

Subject field(s)
  • Architecture
DEF

An arch produced by two curves(usually circular curves with a radius equal to the span) meeting in a point at the top... Its use in Gothic cathedrals greatly contributed to the lightness of their structure.

OBS

Ogive: ... the term is sometimes loosely applied to any pointed arch.

Français

Domaine(s)
  • Architecture
DEF

Arc brisé à deux segments, dans lequel peut s'inscrire un triangle équilatéral : le centre de chaque segment est placé à la naissance de l'autre; leur rayon est égal à la portée.

Espagnol

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Fiche 5 1992-09-08

Anglais

Subject field(s)
  • Industrial Design
  • Architectural Drafting and Tools
CONT

To supplement standard plastic curves, flexible curves... provide limitless variations and are very convenient.... The more desirable one... has a steel ruling edge attached to a spring with a lead core. Flexible curves are limited to gentle curves and are unsuitable for small radius arcs.

Français

Domaine(s)
  • Dessin industriel
  • Dessin architectural et instruments

Espagnol

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