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Compression Model for Ultimate Postbuckling Shear Strength at Elevated Temperatures
| 题名： | Compression Model for Ultimate Postbuckling Shear Strength at Elevated Temperatures |
| 正文语种： | 英文 |
| 作者： | Jonathan D. Glassman, A.M.ASCE; Maria E. Moreyra Garlock, M.ASCE |
| 作者单位： | Princeton Univ |
| 关键词： | Postbuckling; Web shear buckling; Steel girder; Fire; Elevated temperature; Metal and composite structures. |
| 摘要： | Tension field theory assumes that after elastic shear buckling has occurred, compressive stresses in the web plate do not increase; therefore, postbuckling shear strength solely results from the development of tensile stresses within a defined diagonal tension field. Finite-element analyses have found this fundamental assumption to be invalid and a new theory (compression theory) was proposed that bases the development of postbuckling shear strength mostly on the compressive response of the plate (tension plays a secondary role). Previous work has validated compression theory against a wide variety of published experimental data at ambient temperature. This paper shows that compression theory can predict the ultimate postbuckling shear strength of steel web plates up to temperatures of l,100°C. This finding is significant because steel plate girders subjected to fire loading are highly susceptible to web shear buckling. Experimentally validated finite-element models are used to develop temperature-dependent multiplicative parameters to permit the use of compression theory to calculate ultimate postbuckling shear strength at elevated temperatures. Comparisons with published experimental data show that predictions of ultimate postbuckling shear strength from compression theory closely agree with the literature. DOI: 10.1061/(ASCE) ST.1943-541X.0001737. © 2017 American Society of Civil Engineers. |
| 出版日期： | 2017.06 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.06 |
| 页码： | 04017023 |
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