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A fracture critical bridge is a bridge or similar span that is vulnerable to collapse of one or more spans as a result of the failure in tension of a single element. While a fracture critical design is not considered unsafe, it is subject to special inspection requirements that focus on the tension elements of its structure.
The bridge inventory is developed for having a unified database for bridges, including the identification information; bridge types and specifications; operational conditions; and bridge data including geometric data, functional description, inspection data, etc. Bridge type and specifications classify the type of the bridge.
NBI is a template that simplifies and better organizes reference calls to the Federal Highway Administration's (FHWA) National Bridge Inventory (NBI), an annually published data set on all bridges at least 20 feet (6.1 m) in length in the United States. This data includes the coordinates of the bridge, bridge type, when the bridge was built and ...
Around 46,100 of the 617,000 bridges across the United States, or 7.5% of all bridges, ... The Key Bridge was “fracture critical,” the National Transportation Safety Board said Wednesday.
Bridges such as the one in Baltimore are classified as "fracture critical" by the federal government - meaning that if one portion of the bridge collapses, it's likely to take down the rest of the ...
The Francis Scott Key Bridge was a steel arch-shaped continuous truss bridge, the second-longest in the United States and third-longest in the world. [8] Opened in 1977, the 1.6-mile (2.6 km; 1.4 nmi) bridge ran northeast from Hawkins Point, Baltimore , to Sollers Point in Dundalk in Baltimore County, Maryland .
The Key Bridge was “fracture critical” and did not have any redundancy, Homendy said. “What that means is if a member fails, that would likely cause a portion of – or the entire bridge ...
Because of the bridge's design, it was considered "fracture critical"; there was no built-in redundancy to prevent the entire structure from collapsing if one component fails. In comparison, the I-35W Mississippi River bridge, another fracture-critical bridge that collapsed on August 1, 2007, received a sufficiency rating of 50. [12]