原文传递
Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns
| 题名： | Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns |
| 正文语种： | eng |
| 作者： | Hartloper, Alexander R.;de Castro e Sousa, Albano;Lignos, Dimitrios G. |
| 作者单位： | Resilient Steel Struct Lab Civil Engn Inst Sch Architecture Civil & Environm Engn GC B3 514 Stn 18 CH-1015 Lausanne Switzerland;Resilient Steel Struct Lab Civil Engn Inst Sch Architecture Civil & Environm Engn GC B3 465 Stn 18 CH-1015 Lausanne Switzerland;Resilient Steel Struct Lab Civil Engn Inst Sch Architecture Civil & Environm Engn GC B3 485 Stn 18 CH-1015 Lausanne Switzerland |
| 关键词： | Continuum finite-element analysis;Steel structures;Nonlinear geometric instabilities;Kinematic coupling;Beam-columns |
| 摘要： | A warping-inclusive kinematic coupling method to be used in finite-element analysis of members featuring wide-flange cross sections is proposed in this paper. This coupling method is used in mixed-dimension macromodels that combine continuum and beam-column elements to reduce the computational cost of purely continuum finite-element models. The proposed coupling method, utilizing either linear or nonlinear constraint equations, is implemented and validated in a commercial finite-element software; the source code is made publicly available. Case studies indicate that including warping in the coupling formulation is critical for components that may experience coupled local and lateral-torsional buckling. Also highlighted is the potential of macromodels to reduce the total degrees of freedom by up-to about 60%, and computational memory use by up to around 80%, while retaining solution fidelity for beam, column, and panel zone components in steel moment-resting frames. The case studies show that the linear constraint equation formulation may not be suitable for all problems; however, it may still yield acceptable results as long as the level of twisting is insignificant and lateral-torsional buckling is not critical. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 2 |
| 页码： | 04021253.1-04021253.20 |
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