Bridges constructed in the 1950s and 1960s are at an age where rehabilitation is necessary to extend the useful service life. When additional dead load is added by the project or deterioration is observed, MnDOT requires pier caps be rated using the current design code; it should be noted that the live load used in previous design codes is different than current design codes. Analysis often results in low load ratings, ...more »
Bridge and Structures
Fatigue-induced cracks are of great concern to the Departments of Transportation, including MnDOT. An important number of bridges in the country are fracture critical bridges that are vulnerable to fatigue cracks due to the brittle nature of their failure modes. Localizing and monitoring fatigue cracks is critical for determining retrofitting and maintenance plans. However, the localization process is difficult. This ...more »
The goal of this research is to improve decision-making in bridge design, monitoring, and maintenance with immersive virtual reality (VR). The VR technology allows a user to see an asset stereoscopically so that it appears realistically in a 1:1 scale. This appearance of the asset comes along with prominent advantages such as better estimation of distances and sizes, a better spatial perception of complex constructs, ...more »
Marmac is a flexible pipe coupling material that allow for differential settlement of dissimilar pipe materials.