Accession Number : AD0780557

Title :   Development and Evaluation of Measurement Systems for Blast-Induced Motions in Buried Structures.

Descriptive Note : Final rept. Jan-Dec 72,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY

Personal Author(s) : Pickett,Stephen F.

Report Date : APR 1974

Pagination or Media Count : 124

Abstract : Four types of transducers for measuring blast-induced motions in buried structures were developed and/or evaluated. Potentiometric linear displacement transducers were evaluated based on vendor-supplied data. Application techniques, load error analysis and vendor-suggested improvements were also studied. A gage for measuring relative structure/media interface (shear) displacement was designed, developed, and tested in the CERF 2- x 40-ft shock tube. This gage performed well over the low displacement range for which it was designed. A seismometer for simultaneously measuring absolute structural displacement and velocity was also designed, built, and tested. This transducer also performed well. The suitability of WES Air Force Modified (WAM) stress gages and Simmons concrete stress gages for measuring dynamic structure/media interface normal stress was tested in the CERF 2- x 4-ft shock tube. During this test program unexpected results were obtained because of reverberations in the test configuration. Although the results were useful, the data were not adequate for a complete evaluation of these gages. (Author)

Descriptors :   *Underground structures, *Blast loads, *Measuring instruments, Potentiometers, Transducers, Stresses, Seismometers, Shock tubes, Dynamic tests, Nuclear explosions

Subject Categories : Structural Engineering and Building Technology
      Test Facilities, Equipment and Methods
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE