Investigation of Welding-Induced Residual Stresses in a Herringbone Column Using the Blind Hole Technique: An Experimental and Numerical Study

The current research investigates the effect of residual stresses from welding on the stability of steel structures, particularly the herringbone column undulating cross-truss structure in the Zhengzhou New International Exhibition Center project. Residual stresses at 30 key points were measured using the blind hole method, and the temperature and stress fields under thermal coupling were analyzed using numerical simulation techniques. The measured residual stresses of the welded herringbone columns are generally higher than the theoretical calculated values, with the relative error of most measuring points being less than 10% and the minimum difference being 0.98 MPa. It was confirmed that the welding quality meets the design and acceptance standards. Through a combination of experimental measurements and numerical simulations, this study provides valuable reference information for the construction of similar projects. The results indicate that the residual stresses in the herringbone columns are controllable, ensuring the overall safety and reliability of the structure.