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[Slide Show] "Smart" Bridges Harness Technology to Stay Safe

Engineers are deploying sensors to monitor the condition of some of the world's most famous bridges
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TSING MA BRIDGE, HONG KONG, CHINA

The Tsing Ma Bridge in Hong Kong—the world's seventh longest suspension bridge, with two decks carrying both road and rail traffic—is one of the most heavily monitored bridges in the world.....[ More ]

RIO-ANTIRIO CHARILAOS TRIKOUPIS BRIDGE, GREECE

The six-lane Charilaos Trikoupis Bridge in Greece links the town of Rio to the mainland, across the Gulf of Corinth.  The two-mile (three-kilometer) bridge has roughly 300 sensors that monitor its condition and alert operators if an earthquake or high winds warrant  shutting it down to traffic.....[ More ]

KAP SHUI MUN BRIDGE, HONG KONG, CHINA

The Kap Shui Mun Bridge is the second longest cable-stayed bridge in the world. Like the Tsing Ma Bridge, it has two decks and is heavily monitored using sensors, including accelerometers, strain gauges, anemometers, weigh-in-motion and temperature sensors.....[ More ]

ST ANTHONY'S FALLS I-35 BRIDGE, MINNEAPOLIS, USA

The St. Anthony's Falls Bridge, the new I-35 bridge that replaced the bridge that collapsed in Minneapolis in 2007, has an embedded early warning system made up of 323 networked sensors—wire and fiber optic strain and displacement gauges, accelerometers, potentiometers, and corrosion sensors.....[ More ]

THE GOLDEN GATE BRIDGE, CALIFORNIA, USA

The Golden Gate Bridge spans the opening of San Francisco Bay into the Pacific Ocean. The San Andreas Fault runs close by, and the area is susceptible to major earthquakes. While the Golden Gate Bridge does not have an overall sensor-based health monitoring system like the new I-35 Anthony Falls Bridge in Minneapolis, it does have earthquake sensors.....[ More ]

GI-LU CABLE STAY BRIDGE, TAIWAN

The Gi-Lu Cable-Stay Bridge in Taiwan has wireless sensors and accelerometers that monitor its structural health. It spans the Juo Sheui, the longest river in Taiwan, and features a single concrete pylon rising 190 feet (58 meters) above the deck supporting 68 steel cables.....[ More ]

GEUMDANG BRIDGE, ICHEON, SOUTH KOREA

The Geumdang Bridge in South Korea is one of the world’s first to employ low cost wireless sensors to monitor the bridge’s response to speeding and overloaded trucks.....[ More ]

THE BROOKLYN BRIDGE, NEW YORK, USA

The Brooklyn Bridge, opened to traffic in 1883, is one of New York City's iconic bridges and connects lower Manhattan to Brooklyn. The 126-year-old bridge now has fiber optic sensors that measure displacement and temperature, says Bojidar Yanev, executive director of bridge inspection and bridge management, New York City Department of Transportation.....[ More ]

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