Warping Effect in a Steel Box Girder Bridge Structure

In recent years, the construction of steel box girder bridges has become a widespread and standard practice in many major cities across Vietnam. These types of bridges are favored due to their structural strength, durability, and ability to accommodate modern traffic demands. Despite their increasing use, one important aspect often overlooked in current research is the distortion that occurs in the cross-sections of steel box girders, particularly during buckling. This distortion can significantly affect the structural performance and safety of the bridge over time. To address this research gap, this study focuses on analyzing how three critical factors—the size of the cross-section, the type of longitudinal link used, and the distance between longitudinal links—affect the buckling deformation behavior of steel box beam cross-sections. The analysis is conducted using the finite element method (FEM), a powerful simulation tool that enables detailed modeling of structural behavior under load. Through a series of simulations and evaluations, the study reveals that these parameters have a substantial influence on the deformation patterns and overall stability of the steel box girder. The results of this research contribute valuable insights that can assist engineers in designing more efficient and safer steel box bridges. Furthermore, the findings serve as a useful technical reference for current and future bridge design projects in Vietnam, helping to enhance both design standards and construction practices across the country’s transportation infrastructure.