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Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings

As the key safety-critical component of a bridge support system, bridge bearings are extensively used to accommodate, balance, and transfer differential displacements and loads between the superstructure and substructure of a bridge during operations. Several studies have been conducted to obtain dy...

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Autores principales: Sengsri, Pasakorn, Kaewunruen, Sakdirat
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10055670/
https://www.ncbi.nlm.nih.gov/pubmed/36984167
http://dx.doi.org/10.3390/ma16062288
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author Sengsri, Pasakorn
Kaewunruen, Sakdirat
author_facet Sengsri, Pasakorn
Kaewunruen, Sakdirat
author_sort Sengsri, Pasakorn
collection PubMed
description As the key safety-critical component of a bridge support system, bridge bearings are extensively used to accommodate, balance, and transfer differential displacements and loads between the superstructure and substructure of a bridge during operations. Several studies have been conducted to obtain dynamic modal parameters of traditional bridge bearings only in perfectly dry environments. However, in extreme weather conditions (e.g., heavy rain, flash floods, etc.), water can ingress and change the bearings’ properties. In this study, novel 3D-printed porous bridge bearings (3DPPBBs) have been fabricated by Fused Deposition Modeling (FDM) with thermoplastic polyurethane (TPU) filaments. This study is the first to determine the influences of flood conditions on their dynamic properties, which has never been done before. An idealised single degree of freedom (ISDOF) for these novel bearings is considered for the non-destructive field-testing technique of the critical bridge component. A series of experimental tests have been performed under several conditions of flooding levels. The new results unprecedentedly indicate that relatively higher dynamic damping ratios can be found with the increasing flood levels. In contrast, the natural frequencies and dynamic stiffness decrease with the same conditions. Novel insights are essential for bridge engineers to assess and monitor bridge vibrations exposed to extreme weather conditions.
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spelling pubmed-100556702023-03-30 Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings Sengsri, Pasakorn Kaewunruen, Sakdirat Materials (Basel) Article As the key safety-critical component of a bridge support system, bridge bearings are extensively used to accommodate, balance, and transfer differential displacements and loads between the superstructure and substructure of a bridge during operations. Several studies have been conducted to obtain dynamic modal parameters of traditional bridge bearings only in perfectly dry environments. However, in extreme weather conditions (e.g., heavy rain, flash floods, etc.), water can ingress and change the bearings’ properties. In this study, novel 3D-printed porous bridge bearings (3DPPBBs) have been fabricated by Fused Deposition Modeling (FDM) with thermoplastic polyurethane (TPU) filaments. This study is the first to determine the influences of flood conditions on their dynamic properties, which has never been done before. An idealised single degree of freedom (ISDOF) for these novel bearings is considered for the non-destructive field-testing technique of the critical bridge component. A series of experimental tests have been performed under several conditions of flooding levels. The new results unprecedentedly indicate that relatively higher dynamic damping ratios can be found with the increasing flood levels. In contrast, the natural frequencies and dynamic stiffness decrease with the same conditions. Novel insights are essential for bridge engineers to assess and monitor bridge vibrations exposed to extreme weather conditions. MDPI 2023-03-13 /pmc/articles/PMC10055670/ /pubmed/36984167 http://dx.doi.org/10.3390/ma16062288 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sengsri, Pasakorn
Kaewunruen, Sakdirat
Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings
title Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings
title_full Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings
title_fullStr Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings
title_full_unstemmed Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings
title_short Influences of Flood Conditions on Dynamic Characteristics of Novel 3D-Printed Porous Bridge Bearings
title_sort influences of flood conditions on dynamic characteristics of novel 3d-printed porous bridge bearings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10055670/
https://www.ncbi.nlm.nih.gov/pubmed/36984167
http://dx.doi.org/10.3390/ma16062288
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