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Keywords:

  • Trepanning Technique;
  • In situ Stress;
  • Prestressed Concrete;
  • Bi-axial Stress;
  • Residual Prestress;
  • Repair and Rehabilitation

Assessment of in situ stresses in concrete structures which are under bi-axial stress state is complex to handle. In this paper, a trepanning technique is developed to assess the in situ stress. The proposed technique employs a three-element strain gage rosette to measure the strain release due to core drilling. The reliability of the proposed technique is evaluated through laboratory studies.