| Revision as of 17:53, 28 August 2017 editMartinevans123 (talk | contribs)Extended confirmed users, Pending changes reviewers, Rollbackers234,095 editsm Reverted edits by 24.91.249.202 (talk) to last version by Quinton Feldberg← Previous edit | Latest revision as of 04:24, 6 December 2024 edit undoUnrulyevil5 (talk | contribs)Extended confirmed users872 editsNo edit summary | ||
| (284 intermediate revisions by more than 100 users not shown) | |||
| Line 1: | Line 1: | ||
| {{Short description|Type of bridge}} | |||
| {{Multiple issues| | |||
| {{more citations needed|date=December 2019}} | |||
| {{disputed|date=September 2018}} | |||
| }} | |||
| {{Use dmy dates|date=June 2017}} | {{Use dmy dates|date=June 2017}} | ||
| {{unreferenced|date=June 2017}} | |||
| {{Infobox bridge type | {{Infobox bridge type | ||
| |type_name = Beam |
|type_name = Beam bridge | ||
| |image = SteamAcrossIowaRiver.JPG | |image = SteamAcrossIowaRiver.JPG | ||
| |image_title = Multispan plate girder bridge deck on concrete piers. | |image_title = Multispan plate girder bridge deck on concrete piers. | ||
| |sibling_names = | |sibling_names = | ||
| |descendent_names = ], ], ], ]{{citation needed|reason=please provide a reference which defines or lists siblings, descendants, and ancestors for bridge types. |
|descendent_names = ], ], ], ]{{citation needed|reason=please provide a reference which defines or lists siblings, descendants, and ancestors for bridge types. |date=January 2011}} | ||
| |ancestor_names = ] | |ancestor_names = ] | ||
| |carries = ]s, ]s, ]s, ], ] | |carries = ]s, ]s, ]s, ], ] | ||
| Line 15: | Line 20: | ||
| |falsework = No unless cast-in-place reinforced concrete is used | |falsework = No unless cast-in-place reinforced concrete is used | ||
| }} | }} | ||
| '''Beam bridges''' are the simplest structural forms for ]s supported by an ] or ] at each end. No ] |
'''Beam bridges''' are the simplest structural forms for ]s supported by an ] or ] at each end.<ref>{{cite web |url=https://www.historyofbridges.com/facts-about-bridges/beam-bridge/ |title=Beam Bridge Facts, History and Design |author=<!--Not stated--> |website=History of bridges |access-date=2019-09-13 }}</ref> No ] are transferred throughout the support, hence their structural type is known as '']''. | ||
| The simplest beam bridge could be a log (see ]), a ], or a ] ] (see ]) laid across a stream. Bridges designed for modern ] will usually be constructed of ] or ], or a combination of both. The concrete elements may be ] |
The simplest beam bridge could be a log (see ]), a ], or a ] ] (see ]) laid across a stream. Bridges designed for modern ] will usually be constructed of ] or ], or a combination of both. The concrete elements may be ] or ]. Such modern bridges include ], ], and ] bridges, all types of beam bridges. | ||
| Types of construction could include having many ]s side by side with a deck across the top of them, to a main beam either side supporting a deck between them. The main beams could be ] |
Types of construction could include having many ]s side by side with a deck across the top of them, to a main beam either side supporting a deck between them. The main beams could be ]s, ]es, or ]. They could be ], or braced across the top to create a ]. | ||
| ] using |
], France.]] | ||
| ], Germany]] | |||
| Since no moments are transferred, ] (as from an ]) cannot be accommodated, leading to innovative designs, such as ]es and ]es, which contain the ] forces within the ]. | |||
| Beam bridges are not limited to a single ]. Some ]s such as the ] in |
Beam bridges are not limited to a single ]. Some ]s such as the ] in China have multiple simply supported spans held up by piers. This is opposed to viaducts using ]s over the piers. | ||
| Beam bridges are often only used for relatively short distances because, unlike truss bridges, they have no built in supports. The only supports are provided by piers. The |
Beam bridges are often only used for relatively short distances because, unlike truss bridges, they have no built in supports. The only supports are provided by piers. The further apart its supports, the weaker a beam bridge gets. As a result, beam bridges rarely span more than {{convert|250|ft|-1}}. This does not mean that beam bridges are not used to cross great distances; it only means that a series of beam bridges must be joined together, creating what is known as a continuous span. | ||
| ==References== | ==References== | ||
| Line 35: | Line 41: | ||
| {{Bridge footer}} | {{Bridge footer}} | ||
| ⚫ | ] | ||
| ] | ] | ||
| ⚫ | ] | ||
| ] | |||
Latest revision as of 04:24, 6 December 2024
Type of bridge | This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages)
|
 Multispan plate girder bridge deck on concrete piers. | |
| Ancestor | Log bridge |
|---|---|
| Descendant | Box girder bridge, plate girder bridge, trestle bridge, truss bridge |
| Carries | Pedestrians, automobiles, trucks, light rail, heavy rail |
| Span range | Short |
| Material | Timber, iron, steel, reinforced concrete, prestressed concrete |
| Movable | No |
| Design effort | Low |
| Falsework required | No unless cast-in-place reinforced concrete is used |
Beam bridges are the simplest structural forms for bridge spans supported by an abutment or pier at each end. No moments are transferred throughout the support, hence their structural type is known as simply supported.
The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid across a stream. Bridges designed for modern infrastructure will usually be constructed of steel or reinforced concrete, or a combination of both. The concrete elements may be reinforced or prestressed. Such modern bridges include girder, plate girder, and box girder bridges, all types of beam bridges.
Types of construction could include having many beams side by side with a deck across the top of them, to a main beam either side supporting a deck between them. The main beams could be I-beams, trusses, or box girders. They could be half-through, or braced across the top to create a through bridge.
Since no moments are transferred, thrust (as from an arch bridge) cannot be accommodated, leading to innovative designs, such as lenticular trusses and bow string arches, which contain the horizontal forces within the superstructure.
Beam bridges are not limited to a single span. Some viaducts such as the Feiyunjiang Bridge in China have multiple simply supported spans held up by piers. This is opposed to viaducts using continuous spans over the piers.
Beam bridges are often only used for relatively short distances because, unlike truss bridges, they have no built in supports. The only supports are provided by piers. The further apart its supports, the weaker a beam bridge gets. As a result, beam bridges rarely span more than 250 feet (80 m). This does not mean that beam bridges are not used to cross great distances; it only means that a series of beam bridges must be joined together, creating what is known as a continuous span.
References
- "Beam Bridge Facts, History and Design". History of bridges. Retrieved 13 September 2019.
| Bridge-related articles | ||
|---|---|---|
| Structural types |
|  |
| Lists of bridges by type | ||
| Lists of bridges by size | ||
| Additional lists | ||
| Related | ||
