SEISMIC: Maintain California Bridge Strong Motion Instrumentation Systems

Caltrans has installed instrumentation at over 100 bridge and geotechnical array sites with the assistance of the California Geological Survey. This instrumentation is used to record earthquake induced motions, to assess structural damage (or deterioration) and for design model verification, following large seismic events. The strong motion recording systems are located throughout the entire state, from near the Oregon border to the Mexican border, with concentrations in the San Francisco Bay area and the greater Los Angeles region. The number of sensors at structures ranges from as many as 100, for some of the larger structures, to as few as 6 for some small bridges. The required maintenance work involves routine periodic checks of the status of each system to establish state-of-health. For instrumentation needing maintenance, trouble shooting and failure analysis will be performed remotely from Sacramento. Field repair and replacement of failed components will be performed as necessary to restore the instrumentation systems to operation to record earthquakes. In addition, periodic replacement of batteries and other preventative maintenance will be done on a scheduled basis.


    • English


    • Status: Active
    • Sponsor Organizations:

      California Department of Transportation

      1227 O Street
      Sacramento, CA  USA  95843
    • Project Managers:

      Hipley, Pat

    • Performing Organizations:

      Department of Conservation

      , CA  USA 
    • Principal Investigators:

      Shakal, Anthony

    • Start Date: 20100217
    • Actual Completion Date: 20130930
    • Source Data: RiP Project 27583

    Subject/Index Terms

    Filing Info

    • Accession Number: 01466092
    • Record Type: Research project
    • Source Agency: California Department of Transportation
    • Files: RiP, STATEDOT
    • Created Date: Jan 3 2013 3:10PM