Abstract
A practical method for experimentally measuring strain profiles inside cast-concrete structures is presented. The technique employs micro-embedment strain gages which are oriented along paths of interest inside the structural element prior to casting. Tests of numerous post-tensioned concrete-box-girder anchorage elements, and of large-scale pullout test specimens instrumented with micro-embedment gages have shown good agreement between the measured strains and those predicted by means of detailed finite-element analyses within the linear-elastic region of the material.
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References
Stone, W.G., Paes-Filho, W. andBreen, J.E., “Behavior of Post-Tensioned Girder Anchorage Zones,”Center for Transportation Research, #208-2, Austin, Texas (1981).
Stone, W.C., “Internal Strain, Deformation and Failure of Large Scale Pullout Tests in Concrete,”NBS, Washington, D.C., NBSIR 82-2484 (1982).
Stone, W.C., andBreen, J.E., “Analyses of Post-Tensioned Girder Anchorage Zones,”Center for Transportation Research, #208-1, Austin, Texas (1981).
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Stone, W.C. Measurement of internal strain in cast-concrete structures. Experimental Mechanics 23, 361–369 (1983). https://doi.org/10.1007/BF02330049
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DOI: https://doi.org/10.1007/BF02330049