DYNAMIC STRAIN MEASUREMENTS WITH CARLSON STRAIN METERS

IN AN EFFORT TO DETERMINE THE FEASIBILITY OF USING CARLSON UNBONDED RESISTANCE-WIRE STRAIN METERS FOR DYNAMIC STRAIN MEASUREMENTS AT LOW FREQUENCIES NORMALLY ASSOCIATED WITH EARTHQUAKES, CARLSON STRAIN METERS AND MICRODOT EMBEDMENT STRAIN GAGES WERE EMBEDDED ALONG THE LONGITUDINAL AXIS OF 6- BY 16-IN. CONCRETE CYLINDERS. THESE CYLINDERS WERE SUBJECTED TO SINUSOIDAL COMPRESSION LOADINGS OF 0 TO 50,000 LB AT FREQUENCIES VARYING FROM 0.1 TO 10.0 HZ. GENERALLY, THE RESPONSE OF BOTH TYPES OF GAGES WAS ESSENTIALLY THE SAME, INDICATING THE CARLSON STRAIN METER IS A SATISFACTORY INSTRUMENT FOR DYNAMIC STRAIN MEASUREMENT WITHIN THE TEST LIMITS. SINCE THERE ARE LARGE NUMBERS OF CARLSON STRAIN METERS EMBEDDED IN MOST LARGE CONCRETE DAMS IN THE UNITED STATES, THIS EXISTING INSTRUMENTATION TOGETHER WITH SUITABLE ACTUATING AND RECORDING EQUIPMENT COULD BE USED TO MONITOR THE DYNAMIC STRAINS ASSOCIATED WITH EARTHQUAKES. /AUTHOR/

• Supplemental Notes:
  • ENG STUD ITEM ES 041
• Corporate Authors:

  U.S. Army Waterways Experiment Station

  3909 Halls Ferry Road
  Vicksburg, MS  United States  39180-6199
• Authors:
  • McDonald, J E
• Publication Date: 1972-3

Media Info

• Features: References;
• Pagination: 17 p.

Subject/Index Terms

• TRT Terms: Earthquakes; Loads; Sine curves; Strain gages; Strain measurement
• Uncontrolled Terms: Cylinders; Loading
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00230118
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 17 1972 12:00AM