Bowstring
- Bowstring
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Pont bow-string
Un pont bow-string est une catégorie de pont munie d'un tablier (tirant) et de poutres latérales (en arc au dessus du tablier) qui sont encastrés l'un dans l'autre aux extrémités. En travée, le tablier est tenu par des suspentes souvent à la verticale.
Principe mécanique
Le principe mécanique de ce pont est tout simplement le même que celui d'un arc. L'avantage de ce type d'ouvrage réside dans le faible encombrement sous le tablier (voies navigables), mais aussi parce que les efforts d'appuis ne sont que verticaux (pas de poussée horizontale).
Exemple
Soit un camion qui traverse le pont :
- Le poids du camion crée un effort et donc une flexion du tablier (tirant).
- Le tirant ainsi fléchi, provoque une tension dans les suspentes.
- Les suspentes reportent les efforts de traction du tablier dans l'arc (poutres latérales)
- L'arc est en compression, conséquence des suspentes.
- La compression de l'arc agit sur le tablier qui subit donc un effort de traction.
- La flexion du tablier est ainsi diminuée par son propre effort dans les suspentes.
Portail de l’architecture et de l’urbanisme
Portail des transports
Catégorie : Pont par type architectural
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Bowstring — Bow string , n. 1. The string of a bow. [1913 Webster] 2. A string used by the Turks for strangling offenders. [1913 Webster] {Bowstring bridge}, a bridge formed of an arch of timber or iron, often braced, the thrust of which is resisted by a tie … The Collaborative International Dictionary of English
Bowstring — Bow string , v. t. [imp. & p. p. {Bowstringed}or {Bowstrung}; p. pr. & vb. n. {Bowstringing}.] To strangle with a bowstring. [1913 Webster] … The Collaborative International Dictionary of English
bowstring — [bō′striŋ΄] n. 1. a cord stretched from one end of an archer s bow to the other 2. any strong, light cord vt. bowstringed or bowstrung, bowstringing to strangle with a bowstring; garrote … English World dictionary
bowstring — /boh string /, n., v., bowstringed or bowstrung, bowstringing. n. 1. the string of an archer s bow. 2. a string, typically of horsehair, for the bow of an instrument of the violin and viol families. 3. (esp. in the Ottoman Empire) a similar… … Universalium
bowstring — 1. noun the string of an archers bow 2. verb to strangle with a bowstring When the day broke ... it was high time for her to get up and be bowstrung a thing very little more pleasant than hanging, only a trifle more genteel … Wiktionary
bowstring — /ˈboʊstrɪŋ/ (say bohstring) noun 1. the string of a bow. –verb (t) (bowstringed or bowstrung, bowstringing) 2. to strangle with a bowstring or any string or band …
bowstring — n. & v. n. the string of an archer s bow. v.tr. strangle with a bowstring (a former Turkish method of execution) … Useful english dictionary
Bowstring, Minnesota — Bowstring is an unincorporated community in the Bowstring Lake unorganized territory in Itasca County, Minnesota, United States. It is located about 10 miles north of Deer River on Minnesota State Highway 6.The town name appears on some state… … Wikipedia
Bowstring bridge — Bowstring Bow string , n. 1. The string of a bow. [1913 Webster] 2. A string used by the Turks for strangling offenders. [1913 Webster] {Bowstring bridge}, a bridge formed of an arch of timber or iron, often braced, the thrust of which is… … The Collaborative International Dictionary of English
Bowstring girder — Bowstring Bow string , n. 1. The string of a bow. [1913 Webster] 2. A string used by the Turks for strangling offenders. [1913 Webster] {Bowstring bridge}, a bridge formed of an arch of timber or iron, often braced, the thrust of which is… … The Collaborative International Dictionary of English
Bowstring hemp — Bowstring Bow string , n. 1. The string of a bow. [1913 Webster] 2. A string used by the Turks for strangling offenders. [1913 Webster] {Bowstring bridge}, a bridge formed of an arch of timber or iron, often braced, the thrust of which is… … The Collaborative International Dictionary of English
