A bridge is a structure built to span a physical obstacle without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it.
A suspension bridge is a type of bridge in which the deck is hung below suspension cables on vertical suspenders. The first modern examples of this type of bridge were built in the early 1800s. Simple suspension bridges, which lack vertical suspenders, have a long history in many mountainous parts of the world.
A cable-stayed bridge has one or more towers, from which cables support the bridge deck. A distinctive feature are the cables or stays, which run directly from the tower to the deck, normally forming a fan-like pattern or a series of parallel lines. This is in contrast to the modern suspension bridge, where the cables supporting the deck are suspended vertically from the main cable, anchored at both ends of the bridge and running between the towers. The cable-stayed bridge is optimal for spans longer than cantilever bridges and shorter than suspension bridges. This is the range within which cantilever bridges would rapidly grow heavier, and suspension bridge cabling would be more costly.
Leslie Earl Robertson was an American engineer. He was the lead structural engineer of the Twin Towers of the original World Trade Center in New York City, and served as structural engineer on numerous other projects, including the U.S. Steel Tower in Pittsburgh, Shanghai World Financial Center, and the Bank of China Tower in Hong Kong.
Hammersmith Bridge is a suspension bridge that crosses the River Thames in west London. It links the southern part of Hammersmith in the London Borough of Hammersmith and Fulham, on the north side of the river, and Barnes in the London Borough of Richmond upon Thames, on the south side of the river. The current bridge, which is Grade II* listed and was designed by civil engineer Sir Joseph Bazalgette, is the second permanent bridge on the site, and has been attacked three times by Irish republicans. It was closed indefinitely to all motor traffic in April 2019 after cracks were discovered in the bridge's pedestals. The closure was extended to pedestrians and cyclists between August 2020 and July 2021 when limited use resumed.
Arup is a British multinational professional services firm headquartered in London which provides design, engineering, architecture, planning, and advisory services across every aspect of the built environment. The firm employs approximately 16,000 staff in over 90 offices across 35 countries around the world. Arup has participated in projects in over 160 countries.
A suspension bridge usually has main cables, anchored at each end of the bridge. Any load applied to the bridge is transformed into a tension in these main cables. The earliest suspension bridges had the cables anchored in the ground at either end of the bridge, but some modern suspension bridges anchor the cables to the ends of the bridge itself. The earliest suspension bridges had no towers or piers, but these are present in the majority of larger suspension bridges. Although the earlier types of suspension bridges are suitable only for relatively short spans, all of the 14 longest bridges in the world are suspension bridges. Ignoring the possibility of pre-Columbian trans-oceanic contact, there were two independent inventions of the suspension bridge, in Eurasia and in Central and South America.
Hampden Bridge is a heritage-listed single-span suspension bridge that carries Moss Vale Road (B73) across the Kangaroo River, in Kangaroo Valley, in the City of Shoalhaven local government area of New South Wales, Australia. The bridge was designed by Ernest de Burgh and built by Loveridge and Hudson. The property is owned by Transport for NSW. It was added to the New South Wales State Heritage Register on 2 August 2019.
An orthotropic bridge or orthotropic deck is typically one whose fabricated deck consists of a structural steel deck plate stiffened either longitudinally with ribs or transversely, or in both directions. This allows the fabricated deck both to directly bear vehicular loads and to contribute to the bridge structure's overall load-bearing behaviour. The orthotropic deck may be integral with or supported on a grid of deck framing members, such as transverse floor beams and longitudinal girders. All these various choices for the stiffening elements, e.g., ribs, floor beams and main girders, can be interchanged, resulting in a great variety of orthotropic panels.
The U.S. Grant Bridge is the name of the two bridges that carry and have carried traffic on U.S. Route 23 between Portsmouth, Ohio and South Portsmouth, Kentucky across the Ohio River in the United States. The original suspension bridge was closed and demolished in 2001 and the replacement cable-stayed bridge opened on October 16, 2006.
The Osterøy Bridge is a suspension bridge in Vestland county, Norway. The bridge connects the Kvisti farm area on the island of Osterøy in Osterøy Municipality with the Herland farm area on the mainland in Bergen Municipality east of the city of Bergen. The bridge is the third largest suspension bridge in Norway. It is part of Norwegian County Road 566.
The Varodd Bridges are two parallel cantilever bridges in Kristiansand municipality, in Agder county, Norway, and they cross the Topdalsfjorden. They are named after the peninsula on the western shore. It goes from Vige and ends in Søm in Kristiansand. The bridges carry the European route E18 highway over the fjord.
The Bollman Truss Railroad Bridge at Savage, Maryland is the sole surviving example of a revolutionary design in the history of American bridge engineering. The 160-foot (48.8 m) double-span is a suspension truss bridge. The first Bollman bridge was installed on the site; however, the current bridge is not the original. The current bridge was built in 1852 and moved to the site thirty years later. It is one of the oldest standing iron railroad bridges in the United States. Currently, however, it is in use carrying the Savage Mill Trail across the Little Patuxent River.
This is an alphabetical list of articles pertaining specifically to structural engineering. For a broad overview of engineering, please see List of engineering topics. For biographies please see List of engineers.
Yi Sun-sin Bridge is a suspension bridge in the south coast of South Korea. The bridge is one part of The Approach Road to Yeosu Industrial Complex. It is the world's eighth longest suspension bridge in terms of its main span length of 1,545 m since it opened in 2012. The bridge connects Gwangyang with Myodo-dong, a small island that is part of Yeosu City.
The Taizhou Yangtze River Bridge is a bridge complex over the Lower Yangtze River in Jiangsu Province in eastern China. The bridge connects Taizhou on the north bank, Yangzhong on an island in the river, and Yaoqiao Village of Zhenjiang Municipality on the south bank, and consists of a suspension bridge across the north branch stream and a pair of box-girder bridges across the south branch stream. Taizhou Bridge Complex opened in 2012.
The 1915 Çanakkale Bridge, also known as the Dardanelles Bridge, is a road suspension bridge in the province of Çanakkale in northwestern Turkey. Situated just south of the coastal towns of Lapseki and Gelibolu, the bridge spans the Dardanelles strait, about 10 km (6.2 mi) south of the Sea of Marmara. The bridge was officially opened by President Recep Tayyip Erdoğan on 18 March 2022 after roughly five years of construction. The year "1915" in the official Turkish name honours an important Ottoman naval victory against the British and the French during World War I.
Sir Alfred Grenville Pugsley, FRS was a British structural engineer.
The Surtees Rail Bridge is a rail bridge on the Tees Valley Line over the River Tees in the Borough of Stockton-on-Tees. The bridge is south of Stockton-on-Tees town centre and just north of the adjacent Surtees Bridge which carries the A66 road. The bridge is built on the site of a series of Tees Bridges alternating between two adjacent crossing sites.
