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Initial Residual Stresses in Hot-Rolled Wide-Flange Shapes: A Computational Technique and Influence on Structural Performances
| 题名： | Initial Residual Stresses in Hot-Rolled Wide-Flange Shapes: A Computational Technique and Influence on Structural Performances |
| 正文语种： | 英文 |
| 作者： | Shahriar Quayyum, A.M.ASCE;Tasnim Hassan |
| 作者单位： | North Carolina State Univ |
| 关键词： | Initial residual stresses; Hot-rolled W shape; Buckling; Seismic performance; Residual stress simulation; Analysis and computation. |
| 摘要： | 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 W shapes. The IRS t simulation technique is validated against the measured data in the literature for different W-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 W-shaped members. The numerical scheme developed provides a simple experimentally validated technique for simulating IRSs in hot-rolled W shapes for use in structural analysis and design of moment-resisting connections and frames. DOI: 10.106l/(ASCE)ST.1943-541X.0001739. © 2017 American Society of Civil Engineers. |
| 出版日期： | 2017.05 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.05 |
| 页码： | 04017013 |
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