RESEARCH ON WORKING STRESS OF STEEL STRUCTURES BY HOLE-DRILLING METHOD

The finite element method was used to calibrate the release coefficient A and B of the hole-drilling method, and the results were compared with the test results under axial tension load. The results showed that it was feasible to use hole-drilling method to detect the working stress of axial tension member. The release coefficient A and B obtained by finite element calibration were in good agreement with the measured value under low stress state. The error caused by the plastic strain on the hole edge under high stress state could be modified according to the relationship between the distortion-energy parameter S and the release coefficient A and B. The cutting strain produced by drilling under loading state could be modified according to the measured relationship between the cutting strain and the released strain.