Chapter
Apr 26, 2012
Dyna Force — An Elasto-Magnetic Sensor for Force Measuring of Ground Anchors
Publication: Contemporary Topics in Ground Modification, Problem Soils, and Geo-Support
Abstract
Dyna Force sensor uses the elasto magnetic technology (EM) and non destructive testing (NDT) to direct measure stress level in prestressed strands or bars installed on ground anchors or post tensioning tendons. Dyna Force sensor can be used to rapidly read the change in load during proof and performance tests and compare with the pressure gauge and during the life on the anchor to monitor existing lock-off load. It can be used also to determine the load along the bonded length of the anchor allowing the contractor to increase or decrease this length. The paper presents Dyna Force operating principle and some applications. In conclusion, the elasto magnetic technology applied through Dyna Force is a new and easy to use approach to monitor anchor load during proof test and service life of the structure.
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Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Anchors
- Continuum mechanics
- Design (by type)
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Equipment and machinery
- Field tests
- Forces (type)
- Geotechnical engineering
- Load factors
- Load tests
- Magnetic fields
- Measurement (by type)
- Nondestructive tests
- Retaining structures
- Sensors and sensing
- Soil structures
- Solid mechanics
- Structural design
- Structural engineering
- Structures (by type)
- Tests (by type)
Authors
Affiliations
DSI (DYWIDAG-Systems International USA, Inc.), 2154 South Street, Long Beach, CA 90805. E-mail: [email protected]
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