Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge
Due to the high strength-to-weight ratio of fibre reinforced polymers (FRPs), human-induced vibration problematic remains as a subject to be fully comprehended in order to extend the use of composites in Bridge Engineering. Thus, this paper studies an ultra-lightweight FRP footbridge, which presents...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/14/6654 |
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| author | Christian Gallegos-Calderón Javier Naranjo-Pérez Iván M. Díaz José M. Goicolea |
| author_facet | Christian Gallegos-Calderón Javier Naranjo-Pérez Iván M. Díaz José M. Goicolea |
| author_sort | Christian Gallegos-Calderón |
| collection | DOAJ |
| description | Due to the high strength-to-weight ratio of fibre reinforced polymers (FRPs), human-induced vibration problematic remains as a subject to be fully comprehended in order to extend the use of composites in Bridge Engineering. Thus, this paper studies an ultra-lightweight FRP footbridge, which presents excessive vertical vibrations when the fourth harmonic of a walking pedestrian is synchronised with the structure’s fundamental frequency. Focusing on the vertical bending mode, at 7.66 Hz, the bridge dynamic behaviour was assessed under the action of a single pedestrian crossing the facility at a step frequency of 1.9 Hz. As an over prediction of the footbridge response was computed using a moving force (MF) model available in a design guideline, a mass-spring-damper-actuator (MSDA) system was adopted to depict a walker. Hence, Human-Structure Interaction (HSI) phenomenon was considered. Employing the experimental results, parameters of the MSDA system were identified, leading to a HSI model that considers the first fourth harmonics of a walking human. Additionally, a parametric analysis was carried out, determining that the damping ratio of the human body and the load factor associated to the fourth harmonic are the most relevant parameters on the estimation of the response. The identified HSI model may be used as a first approximation to accurately predict the dynamic response of ultra-lightweight composite structures and should be extended to account for crowd-induced loads. |
| first_indexed | 2024-03-10T09:45:41Z |
| format | Article |
| id | doaj.art-1cf72682c7474b68a055f43e8114aeed |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:45:41Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-1cf72682c7474b68a055f43e8114aeed2023-11-22T03:13:29ZengMDPI AGApplied Sciences2076-34172021-07-011114665410.3390/app11146654Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP FootbridgeChristian Gallegos-Calderón0Javier Naranjo-Pérez1Iván M. Díaz2José M. Goicolea3Department of Continuum Mechanics and Theory of Structures, E.T.S.I. Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Calle Prof. Aranguren, 3, 28040 Madrid, SpainDepartment of Continuum Mechanics and Theory of Structures, E.T.S.I. Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Calle Prof. Aranguren, 3, 28040 Madrid, SpainDepartment of Continuum Mechanics and Theory of Structures, E.T.S.I. Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Calle Prof. Aranguren, 3, 28040 Madrid, SpainDepartment of Continuum Mechanics and Theory of Structures, E.T.S.I. Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Calle Prof. Aranguren, 3, 28040 Madrid, SpainDue to the high strength-to-weight ratio of fibre reinforced polymers (FRPs), human-induced vibration problematic remains as a subject to be fully comprehended in order to extend the use of composites in Bridge Engineering. Thus, this paper studies an ultra-lightweight FRP footbridge, which presents excessive vertical vibrations when the fourth harmonic of a walking pedestrian is synchronised with the structure’s fundamental frequency. Focusing on the vertical bending mode, at 7.66 Hz, the bridge dynamic behaviour was assessed under the action of a single pedestrian crossing the facility at a step frequency of 1.9 Hz. As an over prediction of the footbridge response was computed using a moving force (MF) model available in a design guideline, a mass-spring-damper-actuator (MSDA) system was adopted to depict a walker. Hence, Human-Structure Interaction (HSI) phenomenon was considered. Employing the experimental results, parameters of the MSDA system were identified, leading to a HSI model that considers the first fourth harmonics of a walking human. Additionally, a parametric analysis was carried out, determining that the damping ratio of the human body and the load factor associated to the fourth harmonic are the most relevant parameters on the estimation of the response. The identified HSI model may be used as a first approximation to accurately predict the dynamic response of ultra-lightweight composite structures and should be extended to account for crowd-induced loads.https://www.mdpi.com/2076-3417/11/14/6654footbridge vibrationslightweight structuresFRP structureshuman-induced vibrationshuman-structure interaction |
| spellingShingle | Christian Gallegos-Calderón Javier Naranjo-Pérez Iván M. Díaz José M. Goicolea Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge Applied Sciences footbridge vibrations lightweight structures FRP structures human-induced vibrations human-structure interaction |
| title | Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge |
| title_full | Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge |
| title_fullStr | Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge |
| title_full_unstemmed | Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge |
| title_short | Identification of a Human-Structure Interaction Model on an Ultra-Lightweight FRP Footbridge |
| title_sort | identification of a human structure interaction model on an ultra lightweight frp footbridge |
| topic | footbridge vibrations lightweight structures FRP structures human-induced vibrations human-structure interaction |
| url | https://www.mdpi.com/2076-3417/11/14/6654 |
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