Misplaced Pages

#976023

19-588: The Daniel Carter Beard Bridge (also known colloquially as the Big Mac Bridge ), is a yellow twin span steel bowstring arch bridge crossing the Ohio River in Cincinnati, Ohio . It carries Interstate 471 between Cincinnati, Ohio, and Newport, Kentucky . The nickname comes from the yellow arches being similar to the " Golden Arches " logo of McDonald's restaurant. The nickname was coined by local residents after

38-493: A fire beneath the bridge in Sawyer Point Park spread to the park's playground, engulfing the bridge in flames and causing structural damage. The southbound lanes were closed due to the need for extensive repairs. Bowstring arch bridge Thrusts downwards on a tied-arch bridge deck are translated, as tension, by vertical ties between the deck and the arch, tending to flatten it and thereby to push its tips outward into

57-523: A single span, two tied-arches are placed in parallel alongside the deck, so the deck lies in between the arches. Axial tied-arch or single tied-arch bridges have at most one tied-arch per span that is usually centered in the middle of the bridge deck. An example for this is Hoge Brug in Maastricht. Since it has hinged hangers it might also classify as a Nielsen bridge who held a patent on tied-arch bridges with hinged hangers from 1926. Some designs tilt

76-520: A tied-arch; however, the bowstring truss behaves as truss , not an arch . The visual distinction is a tied-arch bridge will not have substantial diagonal members between the vertical members. In a 1978 advisory issued by the Federal Highway Administration (FHWA), the FHWA noted that tied-arch bridges are susceptible to problems caused by poor welds at the connection between the arch rib and

95-752: Is a bridge in New Taipei , Taiwan . It spans over the Tamsui River and links Bali District and Tamsui District . The bridge is a 165 meters long through arch bridge designed by Tung-Yen Lin under T.Y. Lin International. It now carries the Provincial Highway 15 . Bridge construction started in April 1980 and was completed on 31 October 1983. The bridge is accessible within walking distance west of Guandu Station of Taipei Metro . This article about

114-632: Is the Fremont Bridge in Portland, Oregon which is the second-longest tied-arch bridge in the world and also classifies as a through arch bridge . The Chaotianmen Bridge in Chongqing is a tied-arch, through arch and a truss arch bridge . Contrarily, the Hart Bridge uses a cantilevered trussed arch, it is self-anchored , but its arch is non-tied. In particular the bridge deck is suspended, but does not tie

133-462: The Boy Scouts of America . The bridge was originally configured with three lanes and an emergency shoulder on each span. In December 2000, with the completion of a reconstruction project on the 3rd Street Viaduct approach, the bridge was reconfigured to four lanes on each span. The bridge was originally designed by Hazelet + Erdal, now URS Corporation . In the early morning hours of November 1, 2024,

152-585: The Fremont Bridge in Portland, Oregon and the first "computer-designed" bridge of this type, the Fort Pitt Bridge in Pittsburgh, Pennsylvania . Both the tied-arch bridge and the self-anchored suspension bridge place only vertical loads on the anchorage, and so are suitable where large horizontal forces are difficult to anchor. Some tied-arch bridges only tie a segment of the main arch directly and prolong

171-403: The abutments allows tied-arch bridges to be constructed with less robust foundations; thus they can be situated atop elevated piers or in areas of unstable soil . In addition, since they do not depend on horizontal compression forces for their integrity, tied-arch bridges can be prefabricated offsite, and subsequently floated, hauled or lifted into place. Notable bridges of this type include

190-421: The abutments, like for other arch bridges. However, in a tied-arch or bowstring bridge, these movements are restrained not by the abutments but by the strengthened chord, which ties these tips together, taking the thrusts as tension, rather like the string of a bow that is being flattened. Therefore, the design is also called a bowstring-arch or bowstring-girder bridge . The elimination of horizontal forces at

209-666: The arch ends. Tied arch bridges may consist of successively lined up tied arches in places where a single span is not sufficient. An example for this is the Godavari Arch Bridge in Rajahmundry, India. It has four separate supports on each pier and carries the South Central Railway Line of India. It was designed for 250 km/h rail services. Like for multi-span continuous beam bridges the tying chord continually spans over all piers. The arches feet coincide (fuse) at

SECTION 10

#1732934426977

228-413: The arches outward or inward with respect to the axis running along the bridge deck. In analogy to twin bridges , two tied arch bridges erected side by side to increase traffic capacity, but structurally independent, may be referred to by tied arch twin bridges . Each in return may use a single- or multi-span, discrete or continuous tied-arch design. A bowstring truss bridge is similar in appearance to

247-413: The arches. Contrarily each abutment on the riverbanks supports a single arch end only, in the middle of the deck. The tying chord(s) consist of a composite deck structure. Four post tensioned coil steel cables, two to each side of the walking deck, are locked in place by orthogonally run steel beams every 7.5 meters. The hangers are joined to each of these beams between each cable pair. Since the beams extend

266-458: The bridge piers. A good visual indication are shared supports at the piers. Dynamic loads are distributed between spans. This type may be combined with the shouldered tied-arch design discussed above. An example for this is Dashengguan Bridge in Nanjing, China. Its two main arches are shouldered by short auxiliary arches. It is both, a (rigid) tied-arch and a cantilevered trussed arch design. Because

285-450: The bridge's golden arches were constructed. In the 1980s, McDonald's considered opening a floating restaurant at the base after the nickname caught on, but never went to construction. This bridge has a main span of 750 feet (230 m) and has a total span of 2,100 feet (640 m). It is named in honor of Daniel Carter Beard , the founder of the Sons of Daniel Boone and one of the founders of

304-467: The strengthened chord to tie to the top ends of auxiliary (half-)arches . The latter usually support the deck from below and join their bottom feet to those of the main arch(es). The supporting piers at this point may be slender, because the outward-directed horizontal forces of main and auxiliary arch ends counterbalance. The whole structure is self-anchored . Like the simple case it exclusively places vertical loads on all ground-bound supports. An example

323-635: The tie girders, and at the connection between the arch and vertical ties. In addition, problems with electroslag welds , while not isolated to tied-arch bridges, resulted in costly, time-consuming and inconveniencing repairs. The structure as a whole was described as nonredundant : failure of either of the two tie girders would result in failure of the entire structure. Guandu Bridge 25°07′32″N 121°27′26″E  /  25.12556°N 121.45722°E  / 25.12556; 121.45722 The Guandu Bridge ( Chinese : 關渡大橋 ; pinyin : Guāndù Dàqiáo ; Pe̍h-ōe-jī : Koan To Toa Kio )

342-471: The traffic runs through the structural envelope, it is also a through arch bridge. Guandu Bridge in New Taipei, Taiwan is a non-trussed example with three main arches augmented by two auxiliary arch segments at the bridge portals. The Infinity Bridge uses two arches of different height and span length that both bifurcate before their apex. Above its single, middle-displaced river pier the deck lies between

361-474: The width of the post-tensioned concrete deck, the tensing cable pairs remain visible. A close-up of the river pier shows that the structural dead load is tied per span: The larger arch span uses thicker tensing cables and the reflex segments are not suspended from, but supported by steel beams, essentially completing the arches at the river pier. However, for dynamic and non-uniform loads the visually defining arch continuations must not be neglected. Usually, for

#976023