Search results
Results From The WOW.Com Content Network
By the 1960s, prestressed concrete largely superseded reinforced concrete bridges in the UK, with box girders being the dominant form. [ 41 ] In short-span bridges of around 10 to 40 metres (30 to 130 ft), prestressing is commonly employed in the form of precast pre-tensioned girders or planks. [ 42 ]
Single box girder bridge , flyover above eastern approach of the San Francisco–Oakland Bay Bridge. A box girder bridge, or box section bridge, is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and reinforced concrete.
Prestressed concrete is a method for overcoming the concrete's natural weakness in tension. [ 1 ] [ 2 ] It can be used to produce beams , floors or bridges with a longer span than is practical with ordinary reinforced concrete .
A box girder or tubular girder (or box beam) is a girder that forms an enclosed tube with multiple walls, as opposed to an Ɪ-or H-beam. Originally constructed of wrought iron joined by riveting , they are now made of rolled or welded steel, aluminium extrusions or prestressed concrete .
The form of the bridge was simple, and it looked similar to many highway bridges carrying traffic on US highways today. The bridge deck was supported by thirteen concrete girders, each spanning 160 feet (49 m). These girders were prestressed by post-tensioning four wire cables embedded in the concrete.
Download as PDF; Printable version; In other projects Wikimedia Commons; Wikidata item; ... Box girder Prestressed concrete 105+150+8x123 +150+105: National Highway 27
An extradosed bridge employs a structure that combines the main elements of both a prestressed box girder bridge and a cable-stayed bridge. [1] [2]: 85 [3] The name comes from the word extrados, the exterior or upper curve of an arch, and refers to how the "stay cables" on an extradosed bridge are not considered as such in the design, but are instead treated as external prestressing tendons ...
It was decided to examine the possibility of evolving a prestressed concrete bridge with a 97.55 metres (320.0 ft) span. Firms were pre-qualified for the purpose with preferred options suggested for submission of offers, and for the preference of steel girder or concrete girder.