Concrete bridges are a type of bridge , constructed out of concrete . They started to appear widely in the early 20th century.
9-551: The Commonwealth Avenue Bridge are two parallel pre-stressed concrete box girder road bridges that carry Commonwealth Avenue across Lake Burley Griffin , and connect Parkes and City in Canberra , Australia. The current bridge is the fourth crossing over the Molonglo River . The first Commonwealth Avenue Bridge, completed 1916, was damaged in the 1922 flood. The second, using three Leychester-type trusses ,
18-408: Is of multi-web box section shape, continuous over the five spans, ranging from 56 to 73 metres (185 to 240 ft). The central piers, octagonal in shape, are carried on 2-metre (6 ft) diameter reinforced concrete cylinders. Each of the pre-cast concrete box girder sections are 3 metres (10 ft) each. In 2019 a detailed analysis for the strengthening and widening of Commonwealth Avenue Bridge
27-550: The CC BY 3.0 AU licence. Concrete bridge Unreinforced concrete has been used in bridge construction since antiquity: the Romans incorporated concrete cores into a number of their masonry bridges and aqueducts, along with constructing spanning water conduits of concrete. From the late 18th century cast iron framed bridges may have had an unreinforced cast concrete deck, or had their structure encased in concrete, for example
36-583: The Homersfield Bridge , constructed between 1869 and 1870, between the English counties of Suffolk and Norfolk. In 1873, Frenchman Joseph Monier obtained a French patent for a method of iron-wire reinforced concrete bridge construction; his first iron-wire reinforced concrete bridge was constructed across the moat of the marquis de Tillièrein's fr:Château de Chazelet , in 1875. This and all later bridges made according to Monier's system patterned
45-810: The Molonglo be dammed near Yarralumla and that Canberra's 'two halves' should be joined via a lake. Construction of the Commonwealth Avenue Bridge began in March 1961 and the bridge was opened in November 1963. Concurrently, the Kings Avenue Bridge was opened in March 1962; and Scrivener Dam was completed in September 1963. Both bridges were built over a dry riverbed as Canberra was in the grip of drought. It took some time for
54-564: The construction of previously used stone bridges. Their main structural unit was an arch barrel. All barrel sections were reinforced similarly, regardless of the forces acting on it. The longest steel reinforced bridge, in 2024, is the 600 metres (2,000 ft) Tian'e Longtan Bridge, Guangxi Zhuang, China. The US's longest unreinforced concrete span, is the 200 feet (61 m) arch of the, 1910, Rocky River Bridge in Cleveland, Ohio. Early extant examples include: This article about
63-489: The lake to fill; finally filled for the first time on 29 April 1964. Designed by Maunsell & Partners and built by Hornibrook , the Commonwealth Avenue Bridge comprises five spans of continually pre-stressed concrete, totalling 310 metres (1,020 ft). The provide an entry and exit clover leaf layout, on the bridges southern approaches, operate structures were constructed totalling 49 metres (161 ft) each, in four approximately equal spans. The main superstructure
72-476: Was completed in 1924 and damaged in floods a year later. The third bridge, completed in 1927, was a modification of the 1924 bridge, by raising the bridge by one metre (three feet) and adding a fourth truss. At that time, Molonglo River was not dammed to form Lake Burley Griffin. Building on the plan developed by Walter Burley Griffin , in 1957 William Holford proposed to the Federal Government that
81-647: Was presented in a business case for the project. In late 2020 the project was evaluated and accepted by Infrastructure Australia and in January 2021, the Federal Government announced funding to renew the Bridge. That project is unrelated to the ACT Government's plan to extend Canberra light rail network from Civic to Woden . [REDACTED] This article incorporates text available under
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