GPS Monitoring of Dynamic Behavior of Long-Period Structures

Author:

Çelebi Mehmet1,Prescott Will1,Stein Ross1,Hudnut Ken2,Behr Jeff3,Wilson Steve4

Affiliation:

1. U.S. Geological Survey, MS 977, 345 Middlefield Rd., Menlo Park, CA 94025

2. U.S. Geological Survey, 525 S. Wilson Ave., Pasadena, CA 91106

3. SCIGN, 525 S. Wilson Ave., Pasadena, CA 91106

4. Leica GPS, 23868 Hawthorne Blvd., Torrance, CA 90505

Abstract

Global Positioning System (GPS) technology with high sampling rates (∼10 sps) allows scientifically justified and economically feasible dynamic measurements of relative displacements of long-period structures—otherwise difficult to measure directly by other means, such as the most commonly used accelerometers that require post-processing including double integration. We describe an experiment whereby the displacement responses of a simulated tall building are measured clearly and accurately in real-time. Such measurements can be used to assess average drift ratios and changes in dynamic characteristics and therefore can be used by engineers and building owners or managers to assess the building performance during extreme motions caused by earthquakes and strong winds, by establishing threshold displacements or drift ratios and identifying changing dynamic characteristics. Such information can then be used to secure public safety and/or take steps to improve the performance of the building.

Publisher

SAGE Publications

Subject

Geophysics,Geotechnical Engineering and Engineering Geology

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