原文传递
Modeling the Flexural Collapse of Thin-Walled Spirally Welded Tapered Tubes
| 题名： | Modeling the Flexural Collapse of Thin-Walled Spirally Welded Tapered Tubes |
| 其他题名： | ABAQUS[Computer software].Dassault Systèmes Simulia,Johnston,RI. |
| 正文语种： | 英文 |
| 作者： | Abdullah Mahmoud |
| 关键词： | Linear buckling analysis;Nonlinear collapse analysis;Finite-element modeling;Imperfections;Spiral welds;Slender shells; Structural optimization |
| 摘要： | The objective of this study is to develop and validate a practical finite-element modeling protocol for predicting the flexural strength and collapse behavior of thin-walled spirally welded tapered tubes that can be used as steel wind turbine towers. The overall modeling protocol consists of two parts: (1) a meshing protocol is developed considering the effects shell element type, aspect ratio, inclination angle, and density on the buckling moment relative to theoretical predictions; and (2) two patterns of geometric imperfections (eigenmode-affine and so-called weld depression) scaled to the thresholds of fabrication tolerance quality classes in Eurocode 3 are considered in nonlinear collapse shell finite-element models and the results are compared to a series of eight large-scale flexural tests of spirally welded tubes. The computational results are compared with test results in terms of moment-rotation response, stiffness, and buckling modes and show sufficient agreement to justify the further development of nonlinear analysis methods for the design of steel wind turbine towers made from thin-walled spirally welded tapered tubes. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N02021 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001950 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 02 |
| 页码： | 239-252 |
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