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Self-anchored Suspension Bridges
A self-anchored suspension bridge is a suspension bridge type in which the main cables attach to the ends of the deck, rather than directly to the ground or via large anchorages. The design is well-suited for construction atop elevated piers, or in areas of unstable soils where anchorages would be difficult to construct. File:Bridge-suspension-anchorages.svg, Suspension bridge with the main cables attached to the ground (black squares) File:Bridge-self-anchored.svg, Self-anchored suspension bridge; the main cables are attached to the end of the road deck (horizontal blue line) The load path of the self-anchored suspension (SAS) bridge converts vertical loads into tension forces in the main cables which are countered by compressive forces in the towers and deck. The system balances forces internally without external anchorage requirements, making it suitable for sites where large horizontal forces are difficult to anchor. This is similar to the method used in a tied-arch bridge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Span Replacement Of The San Francisco–Oakland Bay Bridge
The eastern span replacement of the San Francisco–Oakland Bay Bridge was a construction project to replace a seismically unsound portion of the San Francisco-Oakland Bay Bridge, Bay Bridge with a new self-anchored suspension bridge (SAS) and a pair of viaducts. The bridge is in the U.S. state of California and crosses the San Francisco Bay between Yerba Buena Island and Oakland, California, Oakland. The span replacement took place between 2002 and 2013, and is the most expensive public works project in California history, with a final price tag of $6.5 billion, a 2,500% increase from the original estimate of $250 million, which was an ''initial'' estimate for a seismic retrofit of the span, not the full span replacement ultimately completed. Originally scheduled to open in 2007, several problems delayed the opening until September 2, 2013. With a width of , comprising 10 general-purpose lanes, it is the world's widest bridge according to Guinness World Records. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three Sisters (Pittsburgh)
The Three Sisters are three similar self-anchored suspension bridges spanning the Allegheny River in downtown Pittsburgh, Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ... at 6th, 7th, and 9th streets, generally running north–south. The bridges have been given formal names to honor important Pittsburgh residents: * Roberto Clemente ( Sixth Street Bridge) * Andy Warhol ( Seventh Street Bridge) * Rachel Carson ( Ninth Street Bridge) Designed by the Allegheny County Department of Public Works, they were all built in a four-year period, from 1924 to 1928, by the American Bridge Company, replacing earlier bridges of various designs at the same sites. Their construction was mandated by the War Department, citing navigable river clearance concerns. They are cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyebar
In structural engineering and construction, an eyebar is a straight bar, usually of metal, with a hole ("eye") at each end for fixing to other components. Eyebars are used in structures such as bridges, in settings in which only tension (physics), tension, and never compression (physical), compression, is applied. Also referred to as "pin- and eyebar construction" in instances where pins are being used. Structure A closed eyebar will typically have a rectangle, rectangular cross section of constant thickness throughout its length and a constant width for all but the ends. The ends will transition to a wider part that is terminated by a rounded end. In the center of this end will be a hole which will receive a cylinder (geometry), cylindrical pin, which may have provision to accept one or more nut (hardware), nuts or Screw, bolts. If of round cross section the bar will typically be end-forged to create a head, which is then flatted by additional forging. The head may then be mac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hutsonville Bridge
The Hutsonville Bridge or Sullivan-Hutsonville Bridge connecting Crawford County, Illinois, and Sullivan County, Indiana, United States, over the Wabash River, built 1939 and replaced in 1988, was an example of the relatively rare self-anchored suspension bridge type. It was designed by Robinson & Steinman, with R. V. Milbank as the resident chief engineer, and constructed by Wisconsin Bridge and Iron Company as general contractor and Vincennes Steel Corporation as steel fabricators and Charles J. Glasgow as a subcontractor. Note the use of multiple independent cables, rather than a large single interleaved and sheathed cable, as is typical for larger suspension bridges, or eyebars, often used in smaller bridges such as the Pittsburgh Seventh Street Bridge, also self-anchored. Although the bridge was determined eligible for inclusion in the National Register of Historic Places in 1987 due to the rarity of its type, the bridge was replaced in 1988 and demolished, with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hutsonville Bridge 3
Hutsonville is a village in Crawford County, Illinois, United States. The population was 478 at the 2020 census. Geography Hutsonville is located in northeastern Crawford County along the Wabash River. Its eastern border is formed by the river, which is also the Indiana state line. The main east–west street through the village is Clover Street, which crosses the river to become Indiana State Road 154, which leads east to Sullivan, Indiana. Clover Street leads west to Illinois Route 1, which runs north to Marshall and south to Lawrenceville. Hutsonville's Main Street leads south as County Route 5, to Palestine. According to the 2010 census, Hutsonville has a total area of , all land. Demographics As of the 2020 census there were 478 people, 255 households, and 136 families residing in the village. The population density was . There were 221 housing units at an average density of . The racial makeup of the village was 94.14% White, 1.26% African American, 0.42% Native ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falsework
Falsework consists of temporary structures used in construction to support a permanent structure until its construction is sufficiently advanced to support itself. For arches, this is specifically called centering. Falsework includes temporary support structures for formwork used to mold concreteHardie G.M. (1995) Building Construction: Principles, Practices, and Materials. New Jersey: Prentice Hall. (Pg 116, paragraph 1) in the construction of buildings, bridges, and elevated roadways. The British Standards of practice for falsework, BS 5975:2008, defines falsework as "Any temporary structure used to support a permanent structure while it is not self-supporting." History Falsework has been employed in bridge and viaduct construction since ancient times. The Romans were renowned for its use, as at the Limyra Bridge in Turkey. Until the turn of the 20th century almost all falsework was constructed from timber. To compensate for timber shortages in different regions and to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russia
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders of Russia, land borders with fourteen countries. Russia is the List of European countries by population, most populous country in Europe and the List of countries and dependencies by population, ninth-most populous country in the world. It is a Urbanization by sovereign state, highly urbanised country, with sixteen of its urban areas having more than 1 million inhabitants. Moscow, the List of metropolitan areas in Europe, most populous metropolitan area in Europe, is the capital and List of cities and towns in Russia by population, largest city of Russia, while Saint Petersburg is its second-largest city and Society and culture in Saint Petersburg, cultural centre. Human settlement on the territory of modern Russia dates back to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arkhangelsk
Arkhangelsk (, ) is a types of inhabited localities in Russia, city and the administrative center of Arkhangelsk Oblast, Russia. It lies on both banks of the Northern Dvina near its mouth into the White Sea. The city spreads for over along the banks of the river and numerous islands of its river delta, delta. Arkhangelsk was the chief seaport of medieval and early modern Russia until 1703, when it was replaced by the newly founded Saint Petersburg. A Northern Railway (Russia), railway runs from Arkhangelsk to Moscow via Vologda and Yaroslavl, and air travel is served by the Talagi Airport and the smaller Vaskovo Airport. As of the Russian Census (2021), 2021 Census, the city's population was 301,199. Coat of arms The arms of the city display the Michael (archangel), Archangel Michael in the act of defeating the Devil. Legend states that this victory took place near where the city stands, hence its name, and that Michael still stands watch over the city to prevent the Devil's r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It shares Anglo-Scottish border, a land border with Scotland to the north and England–Wales border, another land border with Wales to the west, and is otherwise surrounded by the North Sea to the east, the English Channel to the south, the Celtic Sea to the south-west, and the Irish Sea to the west. Continental Europe lies to the south-east, and Ireland to the west. At the 2021 United Kingdom census, 2021 census, the population was 56,490,048. London is both List of urban areas in the United Kingdom, the largest city and the Capital city, capital. The area now called England was first inhabited by modern humans during the Upper Paleolithic. It takes its name from the Angles (tribe), Angles, a Germanic peoples, Germanic tribe who settled du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Western Europe, with a population of 14.9 million. London stands on the River Thames in southeast England, at the head of a tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, was founded by the Roman Empire, Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London, has been the centuries-long host of Government of the United Kingdom, the national government and Parliament of the United Kingdom, parliament. London grew rapidly 19th-century London, in the 19th century, becoming the world's List of largest cities throughout history, largest city at the time. Since the 19th cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelsea Bridge
Chelsea Bridge is a bridge over the River Thames in west London, connecting Chelsea on the north bank to Battersea on the south bank, and split between the City of Westminster, the London Borough of Wandsworth and the Royal Borough of Kensington and Chelsea. There have been two Chelsea Bridges, on the site of what was an ancient ford. The first Chelsea Bridge was proposed in the 1840s as part of a major development of marshlands on the south bank of the Thames into the new Battersea Park. It was a suspension bridge intended to provide convenient access from the densely populated north bank to the new park. Although built and operated by the government, tolls were charged initially in an effort to recoup the cost of the bridge. Work on the nearby Chelsea Embankment delayed construction and so the bridge, initially called Victoria Bridge, did not open until 1858. Although well-received architecturally, as a toll bridge it was unpopular with the public, and Parliament felt obl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh, Pennsylvania
Pittsburgh ( ) is a city in Allegheny County, Pennsylvania, United States, and its county seat. It is the List of municipalities in Pennsylvania#Municipalities, second-most populous city in Pennsylvania (after Philadelphia) and the List of United States cities by population, 67th-most populous city in the U.S., with a population of 302,971 as of the 2020 United States census, 2020 census. The city is located in Western Pennsylvania, southwestern Pennsylvania at the confluence of the Allegheny River and Monongahela River, which combine to form the Ohio River. It anchors the Greater Pittsburgh, Pittsburgh metropolitan area, which had a population of 2.457 million residents and is the largest metro area in both the Ohio Valley and Appalachia, the Pennsylvania metropolitan areas, second-largest in Pennsylvania, and the List of metropolitan statistical areas, 26th-largest in the U.S. Pittsburgh is the principal city of the greater Pittsburgh–New Castle–Weirton combined statistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
