존재응력추정에 의한 구조건전성 평가기법 개발 ( A Study on the Assessment Method of Structural Stability Assuming Residual Stress )

For existing steel structures, it is necessary to assess their stress states and the extents of the stresses on the basis of available information including experimental data. The objective of this study is to develop assessment method of structural stability of steel structures assuming residual stress within the range of linear-elastic behavior. This study is performed using hole-drilling method that is punctured the hole about 10mm in diameter in the part of steel specimens and released the existing residual stresses and measured the change of strain of pre- and post- puncturing. Therefore, this study was carried out to deduce the existing stress including residual stress. The test results are as follows: The values of r(-R/Ro) are suggested between 2.5~3.0 and the size of drilling hole is 5.