Autonomous Crack Monitoring Systems for Monitoring the Health of Transportation Related Structures

The ACM project is poised to change the conduct of vibration investigations as one of its last accomplishments. As described in the section on planned work, ITI will be assisting State regulators and DOT's to deploy ACM as a device for dispute resolution. This development is a result of the continued long-term DOT support of commercialization. For instance, the success of the ACM demonstrations has allowed Geosonics, a leading manufacturer of instruments for 3 monitoring construction vibrations, to invest the resources to manufacture a commercial ACM instrument. While it does not provide the full range of abilities as the hybrid, it can be identified as a stand-alone commercial product. ACM research has allowed another company, 4SE, to replicate ITI/ACM instruments for structural health monitoring and thus demonstrate the feasibility of ITI assisted replication of ACM instruments. Somat based ACM's, integrated with White Industrial Seismographs, have been employed in a number of case studies by State vibration regulators and courts. These case studies and other numerous ITI reports and articles have been synthesized into a book on the subject entitled Microinch Crack Response to Vibration and Weather. ACM micro-inch instrumentation allows comparison of changes in crack width from weather and environmental effects (long term) with those from construction vibration (short term). Such a simple comparison is helpful for public interaction as the general public has too little ability to understand the abstract complexity of the current system of control by measurement of ground motion. The public is interested in cracking, not abstract comparison of time histories of ground motion. They feel vibration but do not sense the long-term weather response. Thus some mechanism is needed to allow the neighbors of traffic and construction vibration to compare these two phenomena, both of which produce strains that can lead to cracking. Real Time Internet Display of Results Important for ITI Bridge Instrumentation Autonomous, real time internet display of instrument response is the foundation of structural health monitoring, and ITI by virtue of past ACM work is at the forefront of this technology. This autonomous display is central to structural health monitoring of critical infrastructure, public and engineering interaction, as well as management of large construction projects. Almost all current ITI field research is built upon the autonomous interaction platform developed during ACM research that began in 1999. Such Internet presentation provides a unique method of interaction, oversight and education. However, critical to the future realization of this public and management interaction is the expansion of resources expended in the area of knowledge management and server programming. construction vibrations, to invest the resources to manufacture a commercial ACM instrument. It has allowed another company, 4SE, to replicate ITI/ACM instruments for structural health monitoring and thus demonstrate the feasibility of ITI assisted replication of ACM instruments. Somat ACM's, integrated with White Industrial Seismographs, has been employed in a number of case studies by State vibration regulators and courts. These case studies and other numerous ITI reports and articles have been synthesized into a book on the subject entitled Microinch Crack Response to vibration and weather. ACM micro-inch instrument allows comparison of changes in crack width from weather and environmental effects (long term) with those from construction vibration (short term). Such a simple comparison is helpful for public interaction as the general public has too little ability to understand the abstract complexity of the current system of control by measurement of ground motion. The public is interested in cracking, not abstract comparison of time histories of ground motion. They feel vibration but do not sense the long-term weather response. Thus some mechanism is needed to allow the neighbors of traffic and construction vibration to compare these two phenomena, both of which produce strains that can lead to cracking. Instrumentation Autonomous, real time internet display of instrument response is the foundation of structural health monitoring, and ITI by virtue of past ACM work is at the forefront of this technology. This autonomous display is critical for structural health monitoring of critical infrastructure, public and engineering interaction, as well as management of large construction projects. Almost all current ITI field research is built upon the autonomous interaction platform developed during ACM research that began in 1999. Such Internet presentation provides a unique method of interaction, oversight and education. However, critical to the future realization of this public and management interaction is the expansion of resources expended in the area of knowledge management and server programming.

• Record URL:
  http://iti.northwestern.edu/acm/

Language

• English

Project

• Status: Completed
• Funding: $553859.69
• Contract Numbers:

  610 4742000 60020779

  A223

• Sponsor Organizations:

  Infrastructure Technology Institute

  L260 Technological Institute
  2145 Sheridan Road
  Evanston, IL  United States  60208-3109
• Principal Investigators:

  Dowding, Charles

• Start Date: 20080307
• Expected Completion Date: 0
• Actual Completion Date: 20130831
• Source Data: RiP Project 16776

Subject/Index Terms

• TRT Terms: Bridges; Configuration management; Cracking; Fracture mechanics; Infrastructure; Research projects
• Subject Areas: Construction; Data and Information Technology; Geotechnology; Highways; Research;

Filing Info

• Accession Number: 01490715
• Record Type: Research project
• Source Agency: Infrastructure Technology Institute
• Contract Numbers: 610 4742000 60020779, A223
• Files: UTC, RIP
• Created Date: Aug 29 2013 1:02AM