Bridges are among the most important infrastructure facilities. So far, the inspection and testing of bridge structures have largely been limited to visual inspection, chain dragging, extracting cores, and in some cases, half-cell corrosion potential mapping. Lots of interesting research have been done by researchers around the globe to bring more innovative NDT solutions to this sector. The following article focuses on the applications of most widely used non-destructive testing for… Read More »Non-Destructive Testing for Detailed Bridge Condition Survey
The Canadian Highway Bridge Design Code (S6-14, 2014) considers a service life of 75 years for newly constructed bridge. What does this mean in engineering terms? It means that the bridges of the future should have satisfactory performance, both durability and structural, during the proposed life-cycle. This can be quite challenging when we look closely; the environment and environmental loading (i.e. snow, freeze and thaw cycles, corrosion, earthquakes, etc.) can… Read More »The Future of Bridge Inspection
The collapse of Ponte Morandi in Genoa, Italy (read more) and Florida International University pedestrian bridge (read more) have raised concerns about the safety and reliability of existing and new bridge structures. common Defects in bridge structures can affect the overall safety of the bridge structures. Different deterioration mechanisms can lead to major defects. Exiting infrastructure in developed countries are nearing the end of their initial service life design. According to the… Read More »Common Defects in Bridge Structures
Acoustic Emission is referred to the radiation of acoustic waves in solids as a result of damage or any irreversible change in its internal structure. Acoustic emission monitoring is well-known for its application in structural health monitoring of civil infrastructure. Structural Health Monitoring Health monitoring is a process of implementing inspection, evaluation, reaction, re-inspection and re-evaluation in order to maintain the functionality of a system. Structural Health Monitoring (SHM) is widely used… Read More »Acoustic Emission Monitoring for Civil Infrastructure
Structure inspection manuals such as the Ontario Structure Inspection Manual (OSIM) mostly emphasizes on the visual inspection and physical condition of bridge structures. The visual inspection methodology in this guideline consists of close up visual assessment of defects in the superstructure and substructure. This methodology is limited to inspection of elements that are at the arms length. For elements with difficult access (i.e. long girders mid-span or deck over river or… Read More »How to Evaluate Concrete Piles?
Damaged Bridges are a major concern in the maintenance and operation of transportation infrastructure. Bridge structures in North America were mainly developed in the 1960’s and 1970’s and are rapidly approaching the end of their initial service life. Major mega cities in North America spend millions of dollars each year to keep these structures safe and functional. According to the ASCE 2013 report card, “one in nine of the US bridges are… Read More »How to Test Damaged Bridges?
Have you ever imagined what would happen if highway bridges could speak?: “That I broke an arm? That I have a steel tendon ruptured? …” Well, they are not too far anymore. Last week, I had the chance to participate in a presentation by Jacques Cartier and Champlain Bridges Incorporated (JCCBI) in the GTA, and learned about this smart instrumentation for stress/strain monitoring installed bridge girders. This helped bridge owners… Read More »Intelligent Bridge Monitoring