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Development of Structural Carbon Nanotube-Based Sensing Composites for Rehabilitation of Deteriorating and Fatigue-Damaged Steel Bridges

Project Information

Project ID: 
FHWA-PROJ-13-0046
Project Abstract: 

Structural Health Monitoring has become a viable solution to continuously monitor critical infrastructure components that show distress or are unable to pass current load rating procedures. This research focuses on the development of a structural sensing composite layer for concrete structures that is capable of providing distributed monitoring capability. The layer consists of carbon nanotubes that are deposited on a carrier, which form a continuous conductive skin that is extremely sensitive to changes in strain and the formation and propagation of microdamage and macrodamage. It can be either loadbearing, i.e., the layer represents the reinforcement as well as the sensor, or nonloadbearing, i.e., the layer acts as a sensing skin alone. Distributed sensing allows for increased detectability of forming or growing defects that cannot necessarily be captured with conventional point-type sensors, such as strain gauges or accelerometers.

Goals:

Develop a structural sensing composite layer for concrete structures that is capable of providing distributed monitoring capability.

Research HUB ID: 
8963
Project Status: 
Active
Project Funding Amount (Contract Award Amount): 
$749,972
Start Date: 
Monday, September 30, 2013
End Date: 
Tuesday, September 8, 2020
Public Access Plan: 
No
FHWA AMRP Program: 
Exploratory Advanced Research
FHWA AMRP Activity: 
Long-Term Infrastructure Performance Program
FHWA Activity: 
Long-Term Bridge Performance

Contact Information

Team: 
Long-Term Infrastructure Performance Team
Office:
Office of Infrastructure Research and Development
Office Code: 
HRDI-30

Deliverables