Jason Adrnt and Raymond from DelDOT Bridge

1 bridge in Delaware for DelDOT

10 years old and only cable stay bridge

Helps notify if the forces in the cables lose their tension or weaken

Had sensors go offline since they are embedded in concrete members

100 strain gages, some are duplicates

Cameras, Acelermators, anemometers, displacement sensors, expansion and contraction sensors, chloride sensors in the deck.

Specific loading periods to test the sensors and the bridge (bridge shut down to traffic)

Implemented when the new bridge was built after the current bridge in 2006 was condemned.

Dr. Chajes at the University of Delaware

Helped design the SHM for the Indian River Inlet Bridge

SHM helps designate stress areas that will be in need of corrective maintenance

Will forewarn you with warnings before collapsing

SHM will allow bridges to go further than their expected life or have less issues than if it wasn’t monitored.

The existence of the SHM system on the IRIB bridge has enabled DelDOT to save money on their 10-year evaluation of the bridge.

Currently SHM systems are only added on high value infrastructure due to the cost of adding a system like this.

• Could be a long time before smaller infrastructure gets something like this