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Validation of Numerical Modeling Techniques for Unbonded Post-Tensioned Beams under Low Velocity Impact
| 题名： | Validation of Numerical Modeling Techniques for Unbonded Post-Tensioned Beams under Low Velocity Impact |
| 正文语种： | eng |
| 作者： | Andrew Nghiem;Thomas H.-K. Kang |
| 作者单位： | Seoul National Univ.;Seoul National Univ. |
| 关键词： | Unbonded post-tensioning;Impact tests;Dynamic response;Failure mechanism;Nonlinear finite element dynamic analysis (NLFEDA);Drop weight testing |
| 摘要： | Abstract This study validates the use of available tools for nonlinear finite element dynamic analysis (NLFEDA) modeling of unbonded post-tensioned reinforced concrete (PT-RC) members under drop weight impact and is the first attempt at low-velocity impact to the authors’ knowledge. The study was performed in two parts. The first portion of the study determined the appropriate mesh and material properties of the testing setup and specimens that were generated by the authors. The second portion of the study then established the level of convergence of the model based on a wide range of design and loading parameters. The NLEFDA was validated using experimental data obtained from laboratory investigations on the behavior of shear-critical and flexural PT-RC members. The interaction between the prestress, as applied from the PT tendon, and the surrounding concrete was well modeled in the presence of large shear failures of the concrete. The modeling techniques, coupled with experimental studies, can be helpful in expanding the range of understanding of the behavior of unbonded PT-RC members. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 8 |
| 页码： | 04022101.1-04022101.11 |
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