Firus, Andrei ; Kemmler, Roman ; Berthold, Hagen ; Lorenzen, Steven ; Schneider, Jens (2022)
A time domain method for reconstruction of pedestrian induced loads on vibrating structures.
In: Mechanical Systems and Signal Processing, 171
doi: 10.1016/j.ymssp.2022.108887
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The present contribution proposes a novel method for the indirect measurement of the ground reaction forces (GRF) induced by a pedestrian during walking on a vibrating structure. Its main idea is to formulate and solve an inverse problem in the time domain with the aim of finding the optimal time dependent moving point force describing the GRF of a pedestrian (input data), which minimizes the difference between a set of computed and a set of measured structural responses (output data). The solution of the inverse problem is addressed by means of the gradient-based trust region optimization strategy. The moving force identification process uses output data from a set of acceleration and displacement time histories recorded at different locations on the structure. The practicability and the accuracy of the proposed GRF identification method is firstly evaluated using simulated measurements, which revealed a high accuracy, robustness and stability of the results in relation to high noise levels. Subsequently, a comprehensive experimental validation process using real measurement data recorded on the HUMVIB experimental footbridge on the campus of the Technical University of Darmstadt (Germany) was carried out. Besides the conventional sensors for the acquisition of structural responses, an array of biomechanical force plates as well as classical load cells at the supports were used for measurement reference GRFs needed in the experimental validation process. The results show that the proposed method delivers a very accurate estimation of the GRF induced by a subject during walking on the experimental structure.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Firus, Andrei ; Kemmler, Roman ; Berthold, Hagen ; Lorenzen, Steven ; Schneider, Jens |
| Art des Eintrags: | Bibliographie |
| Titel: | A time domain method for reconstruction of pedestrian induced loads on vibrating structures |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Verlag: | Elsevier Ltd |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Mechanical Systems and Signal Processing |
| Jahrgang/Volume einer Zeitschrift: | 171 |
| DOI: | 10.1016/j.ymssp.2022.108887 |
| URL / URN: | https://doi.org/10.1016/j.ymssp.2022.108887 |
| Kurzbeschreibung (Abstract): | The present contribution proposes a novel method for the indirect measurement of the ground reaction forces (GRF) induced by a pedestrian during walking on a vibrating structure. Its main idea is to formulate and solve an inverse problem in the time domain with the aim of finding the optimal time dependent moving point force describing the GRF of a pedestrian (input data), which minimizes the difference between a set of computed and a set of measured structural responses (output data). The solution of the inverse problem is addressed by means of the gradient-based trust region optimization strategy. The moving force identification process uses output data from a set of acceleration and displacement time histories recorded at different locations on the structure. The practicability and the accuracy of the proposed GRF identification method is firstly evaluated using simulated measurements, which revealed a high accuracy, robustness and stability of the results in relation to high noise levels. Subsequently, a comprehensive experimental validation process using real measurement data recorded on the HUMVIB experimental footbridge on the campus of the Technical University of Darmstadt (Germany) was carried out. Besides the conventional sensors for the acquisition of structural responses, an array of biomechanical force plates as well as classical load cells at the supports were used for measurement reference GRFs needed in the experimental validation process. The results show that the proposed method delivers a very accurate estimation of the GRF induced by a subject during walking on the experimental structure. |
| Freie Schlagworte: | Ground reaction forces,Force reconstruction,Moving force identification,Human induced vibrations,Human–structure interaction,Footbridges,Vibration serviceability,Inverse problems,force reconstruction,ground reaction forces,moving force identification |
| ID-Nummer: | 108887 |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Statik und Konstruktion 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Statik und Konstruktion > Fachgebiet Statik |
| Hinterlegungsdatum: | 17 Feb 2022 08:16 |
| Letzte Änderung: | 14 Jun 2022 07:08 |
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