The need to effectively monitor the structural health has increased since structural failure could be devastating to our society and economy.
Almost 40% of the 614,387 bridges in U.S. are 50 years or older and 56,007 (9.1%) of them are structurally deficient with a C+ overall rating for safety. 188 million daily trips occur on these structural deficient US bridges and 1,900 of them are on the interstate highway system. An estimated cost of $123 billion is required to rehabilitate them.
In addition to infrastructure, aging and newly-built large-scale structures for energy and traffic uses are also in great need of reliable, accurate and rapid structural monitoring.