Thermoelastic/Plastic Stress Analysis of Fracture-Prone Details in Steel Bridge Superstructures

Project No: 103658

Target Completion Date: November 30, 2016 Pavements

About the project:

Many steel bridge superstructures contain details prone to fatigue or distortion-induced cracking. Such cracks can lead to brittle fracture, greatly reduced load capacity and possible collapse of the bridge.

While transportation departments are aware of the problem, visual inspection is the primary way to determine if cracks are present. Cracks may form between inspections and remain undetected for some time.

This project will develop a system that can nondestructively locate and image dynamic stress concentrations on steel bridge superstructures. The system will use a low-cost thermal imager, dedicated field computer and special signal-processing algorithms. It would allow transportation agencies to quickly and nondestructively detect load-induced stress concentrations and intervene before cracks actually form. The device also could help evaluate the effectiveness of intervention in reducing or eliminating stress concentrations or treating existing fatigue cracks.

Project Team

Project Monitor

Other Investigators

  • Steven B. Chase

Last updated: July 5, 2023

Alert Icon

Please note that this file is not ADA compliant. Choose one of below options: