Residual stress distributions of trapezoidal corrugated web I-members: Experimental and numerical study

This study utilized the hole-drilling method to determine the residual stress distribution in the sections of trapezoidal corrugated web I-members (TCWM). Then, using ABAQUS software, welding simulations and a parameter study of the longitudinal residual stress distribution for TCWM sections are conducted. Finally, a distribution model of the longitudinal residual stress for TCWM sections are proposed. The research findings indicate that the existing residual stress distribution models for flat web I-sections are unsuitable for predicting the residual stress distribution in TCWM sections. Moreover, the longitudinal residual stress distribution in the flanges of TCWMs varies with the position of trapezoidal corrugated webs (TCW). Specifically, the maximum residual tensile stress in the flanges with the parallel web fold surpasses that of the inclined web fold by approximately 10 %. With an increase in corrugation angle, the range of residual tensile stress in the flanges increases. Unlike the flat web of I-sections, there is almost no longitudinal residual stress in the middle area of the TCWs. The proposed models of residual stress distribution for TCWM sections consider the influence of corrugation and cross-sectional dimensions and align well with both experimental and numerical results.