Finite Element Modeling of Novel Steel Beam with Partially Corrugated Webs

This study presents a validated finite element model for a steel I-beam with a partially corrugated web (PCW), focusing on its shear behavior under four-point bending. The model was developed in ABAQUS software and calibrated using experimental results from a previously tested specimen (PCW-S-۲.۳). Both linear buckling and nonlinear post-buckling analyses were performed, employing a bilinear elastic-plastic material model and Riks method for tracking post-peak response. Mesh sensitivity analysis revealed that accurate detection of boundary buckling near the transition zone between flat and embossed web regions requires local refinement. An optimized mesh with global seed size of ۷ and localized refinement in the web boundary zone (seed = ۱۰) showed excellent agreement with the experimental load-displacement response. Since the test did not report geometric imperfections, an imperfection sensitivity study was conducted. Thirty buckling modes were extracted and tested with different amplitudes. Among them, Mode ۲۵ with an amplitude of L/۱۰۰۰ (Analysis ۵) provided the best match in terms of both failure shape and load-displacement behavior. Additionally, an analysis was carried out to investigate the effect of transverse stiffener placement in set-up of four-point bending test relative to the boundary zone. Results showed minimal influence on global shear behavior, confirming the model's robustness. The proposed model successfully replicated the experimental behavior and provides a reliable basis for future design and optimization studies of PCW beams.

کلیدواژه ها:

Partially Corrugated Web ، Shear Buckling ، Numerical Analysis