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Swing Bridge
A swing bridge (or swing span bridge) is a movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pivot horizontally as shown in the animated illustration to the right. Small swing bridges as found over canals may be pivoted only at one end, opening as would a gate, but require substantial underground structure to support the pivot. In its closed position, a swing bridge carrying a road or railway over a river or canal, for example, allows traffic to cross. When a water vessel needs to pass the bridge, road traffic is stopped (usually by traffic signals and barriers), and then motors rotate the bridge horizontally about its pivot point. The typical swing bridge will rotate approximately 90 degrees, or one-quarter turn; however, a bridge which intersects the navigation channel at an oblique angle may be built to rotate only 45 degrees, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bascule Bridge
A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- or double-leafed. The name comes from the French term for balance scale, which employs the same principle. Bascule bridges are the most common type of movable span because they open quickly and require relatively little energy to operate, while providing the possibility for unlimited vertical clearance for marine traffic. History Bascule bridges have been in use since ancient times, but until the adoption of steam power in the 1850s, very long, heavy spans could not be moved quickly enough for practical application. Types There are three types of bascule bridge and the counterweights to the span may be located above or below the bridge deck. The fixed-trunnion (sometimes a "Chicago" bascule) rotates around a large axle that raises the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compression (physical)
In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions.Ferdinand Pierre Beer, Elwood Russell Johnston, John T. DeWolf (1992), "Mechanics of Materials". (Book) McGraw-Hill Professional, It is contrasted with tension or traction, the application of balanced outward ("pulling") forces; and with shearing forces, directed so as to displace layers of the material parallel to each other. The compressive strength of materials and structures is an important engineering consideration. In uniaxial compression, the forces are directed along one direction only, so that they act towards decreasing the object's length along that direction. The compressive forces may also be applied in multiple directions; for example inwards along the edges of a plate or all over the side surface of a cylinder, so as to reduce it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria Bridge, Townsville
Victoria Bridge is a heritage-listed swing bridge over the Ross Creek at Stokes Street, Townsville CBD, City of Townsville, Queensland, Australia. The central-pivoting swing bridge was constructed by G. H. Royce & Co. in 1888 to 1889. It is one of only two of its type constructed in Australia. By 1924 the swing section had ceased to function, but the bridge continued to serve as a road bridge until 1975. Following a 1988 redevelopment, it was converted to pedestrian traffic, with a row of modern shops built along its length. It was added to the Queensland Heritage Register on 21 October 1992. History Apart from Victoria Bridge, built in 1888-1889, the only other metal girder swing bridge constructed in Australia was the smaller one over the Forth River at Leith in Tasmania, built in 1884. Tenders were called by the Department of Works, Bridges Branch, on 25 September 1885 for the Townsville structure. A tender submitted by G.H. Royce & Co. of Sydney was accepted at a cos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hay, New South Wales
Hay is a town in the western Riverina region of south western New South Wales, Australia. It is the administrative centre of Hay Shire local government area and the centre of a prosperous and productive agricultural district on the wide Hay Plains. Located approximately midway between Sydney and Adelaide at the junction of the Sturt, Cobb and Mid-Western Highways, Hay is an important regional and national transport node. The town itself is built beside the Murrumbidgee River, part of the Murray-Darling river system; Australia's largest. The main business district of Hay is situated on the north bank of the river. History Aboriginal communities in the western Riverina were traditionally concentrated in the more habitable river corridors and amongst the reedbeds of the region. The district surrounding Hay was occupied by at least three separate Aboriginal groups at the time of European settler expansion onto their lands. The area around the present township ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hay Bridge, New South Wales
The Hay Bridge is a road bridge that carries the Cobb Highway across the Murrumbidgee River at Hay, New South Wales, Australia. The current bridge is the second bridge located in Hay that crosses the Murrumbidgee; the first bridge was in operation from 1873 until 1973; the second and current bridge has operated since 1973. Current bridge The current Hay Bridge is a six-Span (architecture), span, reinforced concrete and steel box girder structure supported on steel piles and slender concrete piers. It has an overall length of with two spans and four spans, and is between kerbs. A footway has been provided for pedestrian use. Each box girder is made up of five cells each wide and high. The base and walls of each cell are steel plates and the reinforced concrete deck forms the top section. A feature of the design is the cantilever construction of the girders. This allows a greater distance between piers than a simply supported span design. Hay is located on the Western Pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anzac Bridge
The Anzac Bridge is an eight-lane cable-stayed bridge that carries the Western Distributor (A4) across Johnstons Bay between Pyrmont and Glebe Island (part of the suburb of Rozelle), on the western fringe of the central business district of Sydney, New South Wales, Australia. The bridge forms part of the road network leading from the central business district, the Sydney Harbour Bridge, and Cross City Tunnel to the Inner West and Northern Suburbs. History Glebe Island Bridges There were two bridges over Johnstons Bay before the construction of the Anzac Bridge. The first bridge was constructed as part of a project to move the abattoirs out of central Sydney, and to construct public abattoirs at Glebe Island. The first pile of the original bridge was driven in October 1860. The bridge was opened in 1862 and was a timber beam bridge long and wide with a swing section on the eastern side. It replaced a double steam punt crossing. The second Glebe Island Bridge was an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glebe Island Bridge
The Glebe Island Bridge is a heritage-listed disused swing Allan truss road bridge that carried Victoria Road (as Bank Street) across Rozelle Bay, located in the inner city Sydney suburb of Pyrmont in the City of Sydney local government area of New South Wales, Australia. The bridge, that connected Rozelle to Pyrmont by road, is one of the last remaining swing bridges of its type in Australia and in the world. It was designed by Percy Allan and built from 1899 to 1903 by Bridges Branch of NSW Public Works Department. It is also known as RMS Bridge No. 61. It was added to the New South Wales State Heritage Register on 29 November 2013 and was listed on the (now defunct) Register of the National Estate on 19 April 1989. History Sydney was declared a city in 1842 and was concentrated in the area currently occupied by the modern CBD. In the mid-1800s, it was a mix of commerce, retail, residences, manufacturing works and factories, with the Botanic Gardens and Domain to the ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrmont Bridge
The Pyrmont Bridge, a heritage-listed swing bridge across Cockle Bay, is located in Darling Harbour, part of Port Jackson, west of the central business district in the City of Sydney local government area of New South Wales, Australia. Opened in 1902, the bridge initially carried motor vehicle traffic via the Pyrmont Bridge Road between the central business district and . Since 1981 the bridge has carried pedestrian and bicycle traffic only, as motor vehicles were diverted to adjacent freeway overpasses. The bridge was added to the New South Wales State Heritage Register on 28 June 2002, the centenary of its opening. The Jimmy Barnes' 1985 song "I'd die to be with you Tonight" was filmed on the Bridge, with it in the swing-out configuration. (See:I'd Die to be with You Tonight) History The first Pyrmont Bridge was opened on 17 March 1858, and was a wooden pile bridge with an iron centre 'swing panel' to allow ships to pass. In the first two weeks 20,000 pedestrians paid the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gladesville Bridge
Gladesville Bridge is a heritage-listed concrete arch road bridge that carries Victoria Road over the Parramatta River, linking the Sydney suburbs of Huntleys Point and Drummoyne, in the local government areas of Canada Bay and Hunter's Hill, in New South Wales, Australia. Despite its name, the bridge is not in Gladesville. The Gladesville Bridge is a few kilometres upstream of the famous Sydney Harbour Bridge. When it was completed in 1964, Gladesville Bridge was the longest single span concrete arch ever constructed. Gladesville Bridge is the largest of a complex of three bridges, including Fig Tree Bridge and Tarban Creek Bridge, designed to carry traffic as part of the North Western Expressway. The bridge was the first phase of this freeway project that was to connect traffic from the via /Lane Cove, then through / to connect into the city. Due to community action the freeway project was abandoned by the Wran Government in 1977, leaving the Gladesville Bridge connecting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bojana River
The Bojana ( cnr, Бојана), also known as the Buna ( sq, Bunë), is a river in Albania and Montenegro which flows into the Adriatic Sea. An outflow of Lake Skadar, measured from the source of the lake's longest tributary, the Morača, the Morača-Lake Skadar-Bojana system is long. Etymology The modern Albanian name of the river delivers from Illyrian ''Barbanna'' ''and'' follows Albanian phonetic sound rules. Course The river in Albania The river used to be longer, but due to a rise in the level of Lake Shkodër, the uppermost part of the river is now under the lake's surface. The river initially flows east, but after only few kilometers reaches the city of Shkodër and turns to the south. On the southern outskirts of the city, the river receives its most important tributary, the Great Drin, the greater part of which became its tributary after changing course during a flood in 1858 and now brings more water (352 m³/s) than the Buna itself (320 m³/s). After fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Govt Bridge Anim2
A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is a means by which organizational policies are enforced, as well as a mechanism for determining policy. In many countries, the government has a kind of constitution, a statement of its governing principles and philosophy. While all types of organizations have governance, the term ''government'' is often used more specifically to refer to the approximately 200 independent national governments and subsidiary organizations. The major types of political systems in the modern era are democracies, monarchies, and authoritarian and totalitarian regimes. Historically prevalent forms of government include monarchy, aristocracy, timocracy, oligarchy, democracy, theocracy, and tyranny. These forms are not always mutually exclusive, and mixed governme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
