原文传递
State Estimation for Prediction of Fatigue Life for a Rollercoaster Connection Subjected to Operational Multiaxial Nonproportional Loading
| 题名： | State Estimation for Prediction of Fatigue Life for a Rollercoaster Connection Subjected to Operational Multiaxial Nonproportional Loading |
| 正文语种： | eng |
| 作者： | Tchemodanova, Sofia Puerto;Tatsis, Konstantinos;Sanayei, Masoud;Chatzi, Eleni;Dertimanis, Vasilis |
| 作者单位： | Tufts Univ Dept Civil & Environm Engn Medford MA 02155 USA;Swiss Fed Inst Technol Dept Civil Environm & Geomat Engn CH-8092 Zurich Switzerland;Tufts Univ Dept Civil & Environm Engn Medford MA 02155 USA;Swiss Fed Inst Technol Dept Civil Environm & Geomat Engn CH-8092 Zurich Switzerland;Swiss Fed Inst Technol Dept Civil Environm & Geomat Engn CH-8092 Zurich Switzerland |
| 关键词： | High cycle fatigue;Steel structures;Nondestructive testing;Nonproportional multiaxial loading;Response-only method;Measured strains;Dynamic substructuring;Augmented Kalman filter;Strain prediction;Remaining fatigue life prediction |
| 摘要： | Recent research on structural health monitoring has shown the applicability of Kalman filtering for fusion of models and data of dynamic systems. In this study, the augmented Kalman filter (AKF) is combined with a substructuring approach for the estimation of strain time histories at unmeasured locations of a rollercoaster connection, with the purpose of predicting remaining fatigue life. The AKF allows for response estimation in the absence of direct measurements of operational loads and in the presence of noisy measurements at limited locations of the instrumented system. The proposed research implements for the first time the AKF and a substructure with exclusively in-service strain measurements from a full-scale structure. Given that uniaxial fatigue life assessment methods often prove insufficient for large in-service structures with complex geometry and subjected to multiaxial nonproportional loadings, the critical plane method is here employed for estimation of fatigue life. The applicability of a substructuring approach combined with strain estimates from the AKF is demonstrated and evaluated with operational strain measurements obtained from an in-service rollercoaster support structure. It is shown that the proposed methodology and fine-tuning of the AKF parameters result in a close match of predicted and measured strains. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 5 |
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