22nd August 2020 – (Hong Kong) At the Zhuhai Gongbei Port construction site, it is suspected that part of the pedestrian footbridge has collapsed, and Customs clearance services were once disrupted today. The design of the bridge was unique because it had high tension eyebar chains, rocker towers, and a unique anchorage system. This finding had significance, considering the extreme temperature changes in the region. Further examination of the eyebar showed a crack that had occurred during manufacturing. The 41 … Further, no testing methods were developed to measure the strength of large eyebar chains. The traffic on the bridge was crawling. Hong Kong's rule of law has been pushed to the "brink of total collapse" after more than five months of protests, police have warned. The other factor was the low temperature that on the day of the collapse, was near to freezing temperature. Other improvements to bridge management include nondestructive evaluation methods. The reassembly of the bridge showed evidence of a cleavage fracture in the eyebar on the Ohio side of the truss. The connection at the eyebar was not redundant because it consisted of only two pairs of eyebars. This theory implied that the pin cap would become responsible for resisting the lateral forces within the connection. Point Pleasant Bridge Disaster: Collapse of the Eyebar-Chain Suspension Bridge, Mackinac Bridge: Construction of the Most Aerodynamically Stable Suspension Bridge. HONG KONG // Hong Kong authorities said they had launched an investigation after an air bridge collapsed at the city's airport, ripping the door off a Cathay Pacific plane and injuring a technician. Beyond The Headlines: How will Arab Americans vote in US presidential election. This shift could have been induced by sediments around the piers being washed away (known as scour), a deficiency in the foundation that would cause the anchors and piers to move, or an impact to the piers from a water vessel. The bridge connected two major cities of Ohio and West Virginia, and provided direct access to their respective state capitals. It was the holiday season and people were shuttling back and forth between the two cities via the bridge. Thus, as soon as the tower toppled over, all the spans of the bridge collapsed because it was constructed as a continuous truss between anchorages. The growth of the crack was most likely due to stress corrosion. In Taiwan, a huge 140 meter (459 feet) bridge collapsed in October of 2019, the event is known as the “Taiwan Bridge Collapse”. We are investigating the cause of the incident," a spokesman from the Hong Kong Airport Authority said. Design features also indicated that the towers were protected from possible contact with a vehicle. This adjustment would cause a sliding friction to occur rather than a rolling friction. Calculations showed a 3% loss of steel due to this degradation of material. After the vehicle passed, the connection would respond in compression to return to its original static dead load. It was the second eyebar suspension bridge consisting of heat-treated eyebars, and a rocking base was constructed on the Ohio river. The traffic on the bridge was crawling. Towers of the bridge were supported on the rockers. Beyond the Headlines: Stories from 2020 of Covid-19 and beyond. This oscillation caused fatigue stress in the member and could, over time, lead to failure. Scour was eliminated because of the observations of the divers at the scene. Some travellers crossing the border had to walk across the construction site to bypass the section affected by the incident. The length of the Point Pleasant Bridge was 681 m. The Point Pleasant Bridge was constructed at the cost of USD 1.2 million. It was possible for these forces to exceed the available resistance. A 140-meter (459-foot) bridge has collapsed in northeast Taiwan, sending an oil tanker in the water and killing at least two people in fishing boats below. Collapse of the Tacoma Narrows Bridge. The construction of the bridge started in 1920 and completed in 1928. The use of all rear bridges has been suspended for inspection, the official said, adding that passengers however would continue to board aircraft via the head bridges that are normally used by first class travellers. The cause of the fatigue stress was the cycling loading applied on the bridge over the four decades. All affected passengers had left Hong Kong by Monday morning on alternative flight arrangements, she added. This sag would change the load distribution throughout the structure. Golden Gate Bridge: Construction of One of the Longest Suspension Bridges in the World, Chenab Bridge: Construction of the World’s Highest Rail Bridge, Austin Dam Failure: One of the Biggest Disasters in US History. The boarding bridge for a Cathay flight bound for Nagoya in Japan suddenly collapsed after all of the 262 passengers had boarded the aircraft last night, according to the Hong Kong Airport Authority and the airline. The next morning, the bridge authorities closed the bridge for traffic after noticing that the bridge was undergoing severe undulating motions. Plagued by the collapse of travel amid the coronavirus pandemic, arrivals to Hong Kong plummeted nearly 94 per cent year on year in 2020 to just 3.57 … The experts investigated many possible causes of the collapse. Each joint contained two eyebars that connected to the suspension chains. A Cathay spokeswoman said its aircraft was "slightly damaged" but would not comment on whether the home carrier will seek compensation from the airport authorities. College of Civil Engineering, Fuzhou University, Fuzhou, China. A second worker was found dead Thursday evening after a work platform collapsed earlier at the construction site of the Hong Kong-Zhuhai-Macau bridge. He said the technician's condition was stable. The exposed surface was thus left open to natural elements and created a built-in weakness. This stress increase was considered in terms of an increased percentage of the original live loads. It's one year since part of a motorway bridge outside Genoa collapsed, as cars and lorries sped across it. The built-in flaw in the eyebar led to the sudden propagation of the crack when the fatigue stress exceeded its limit. Also, the overall redundancy of the structure was poor. VIP members get additional benefits. The six-lane, Hong Kong-Zhuhai-Macau Bridge is 34 miles long and includes an underwater tunnel that goes for four miles. Terrifying moment massive bridge suddenly collapses in a Chinese city 'due to severe flooding', sending cars into a raging river. 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