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Initial Residual Stresses in Hot-Rolled Wide-Flange Shapes: A Computational Technique and Influence on Structural Performances
Wide-flange members are hot-rolled to their final shapes and subsequently air-cooled, during which residual stresses are developed due to nonuniform cooling. Both global and local flange-buckling strengths and the seismic performance of W-shaped columns are influenced by initial residual stresses (IRSs). Hence, it is essential to accurately predict the magnitude and distribution of IRSs to investigate their influence on structural performance. However, most of the literature either ignores IRSs or assumes their simplified distribution. This study developed a simple computational scheme to simulate IRSs and their distribution in hot-rolled shapes. The IRS simulation technique is validated against the measured data in the literature for different -shape sizes. Good conformity is observed between the simulated and measured data. IRSs due to uneven cooling can be as high as one-half of the yield stress and can significantly affect the load-carrying capacity and deformation of -shaped members. The numerical scheme developed provides a simple experimentally validated technique for simulating IRSs in hot-rolled shapes for use in structural analysis and design of moment-resisting connections and frames.
Initial Residual Stresses in Hot-Rolled Wide-Flange Shapes: A Computational Technique and Influence on Structural Performances
Wide-flange members are hot-rolled to their final shapes and subsequently air-cooled, during which residual stresses are developed due to nonuniform cooling. Both global and local flange-buckling strengths and the seismic performance of W-shaped columns are influenced by initial residual stresses (IRSs). Hence, it is essential to accurately predict the magnitude and distribution of IRSs to investigate their influence on structural performance. However, most of the literature either ignores IRSs or assumes their simplified distribution. This study developed a simple computational scheme to simulate IRSs and their distribution in hot-rolled shapes. The IRS simulation technique is validated against the measured data in the literature for different -shape sizes. Good conformity is observed between the simulated and measured data. IRSs due to uneven cooling can be as high as one-half of the yield stress and can significantly affect the load-carrying capacity and deformation of -shaped members. The numerical scheme developed provides a simple experimentally validated technique for simulating IRSs in hot-rolled shapes for use in structural analysis and design of moment-resisting connections and frames.
Initial Residual Stresses in Hot-Rolled Wide-Flange Shapes: A Computational Technique and Influence on Structural Performances
Quayyum, Shahriar (author) / Hassan, Tasnim (author)
2017-01-31
Article (Journal)
Electronic Resource
Unknown
Flange local buckling in wide-flange shapes
| Engineering Index Backfile | 1965
Characteristics of heavy weight wide-flange structural shapes
| TIBKAT | 1988
Proposed residual stress model for hot‐rolled wide flange steel cross sections
| Wiley | 2023