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Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs

Polyvinyl alcohol fiber reinforced engineering cementitious composites (PVA-ECCs) exhibit excellent tight-cracking and super-high toughness behaviors and have been widely used in bridge repair projects. In reality, the conventional method in bridge repair is that a portion of the bridge is closed an...

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Autores principales: Zhang, Xiaodong, Liu, Shuguang, Yan, Changwang, Wang, Xiaoxiao, Wang, Huiwen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829306/
https://www.ncbi.nlm.nih.gov/pubmed/31614921
http://dx.doi.org/10.3390/ma12203337
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author Zhang, Xiaodong
Liu, Shuguang
Yan, Changwang
Wang, Xiaoxiao
Wang, Huiwen
author_facet Zhang, Xiaodong
Liu, Shuguang
Yan, Changwang
Wang, Xiaoxiao
Wang, Huiwen
author_sort Zhang, Xiaodong
collection PubMed
description Polyvinyl alcohol fiber reinforced engineering cementitious composites (PVA-ECCs) exhibit excellent tight-cracking and super-high toughness behaviors and have been widely used in bridge repair projects. In reality, the conventional method in bridge repair is that a portion of the bridge is closed and repaired while the other portion is left open to traffic. Consequently, newly placed PVA-ECC bridge repairs (NP-ECC-BRs) are exposed to continuous traffic vibrations (TRVs), even during the setting periods. However, whether or not TRVs affect the expected flexural properties of NP-ECC-BRs remains unknown. The purpose of this investigation was to determine the effects of TRVs on the attainable flexural properties of NP-ECC-BRs. For this purpose, a total of 324 newly fabricated thin-plate specimens were exposed to different vibration variables using self-designed vibration equipment. After vibration, a four-point flexural test was conducted to determine the flexural properties of the specimens. The results indicate that the effects of TRVs on the strengths of NP-ECC-BRs was significantly negative, but insignificantly positive for flexural deformation. We concluded that in the design of PVA-ECC bridge repairs, effects of TRVs on the flexural deformation capacity of NP-ECC-BRs are not a cause for concern, but serious consideration should be given to the associated reduction of flexural load-bearing capacity.
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spelling pubmed-68293062019-11-18 Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs Zhang, Xiaodong Liu, Shuguang Yan, Changwang Wang, Xiaoxiao Wang, Huiwen Materials (Basel) Article Polyvinyl alcohol fiber reinforced engineering cementitious composites (PVA-ECCs) exhibit excellent tight-cracking and super-high toughness behaviors and have been widely used in bridge repair projects. In reality, the conventional method in bridge repair is that a portion of the bridge is closed and repaired while the other portion is left open to traffic. Consequently, newly placed PVA-ECC bridge repairs (NP-ECC-BRs) are exposed to continuous traffic vibrations (TRVs), even during the setting periods. However, whether or not TRVs affect the expected flexural properties of NP-ECC-BRs remains unknown. The purpose of this investigation was to determine the effects of TRVs on the attainable flexural properties of NP-ECC-BRs. For this purpose, a total of 324 newly fabricated thin-plate specimens were exposed to different vibration variables using self-designed vibration equipment. After vibration, a four-point flexural test was conducted to determine the flexural properties of the specimens. The results indicate that the effects of TRVs on the strengths of NP-ECC-BRs was significantly negative, but insignificantly positive for flexural deformation. We concluded that in the design of PVA-ECC bridge repairs, effects of TRVs on the flexural deformation capacity of NP-ECC-BRs are not a cause for concern, but serious consideration should be given to the associated reduction of flexural load-bearing capacity. MDPI 2019-10-13 /pmc/articles/PMC6829306/ /pubmed/31614921 http://dx.doi.org/10.3390/ma12203337 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Xiaodong
Liu, Shuguang
Yan, Changwang
Wang, Xiaoxiao
Wang, Huiwen
Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs
title Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs
title_full Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs
title_fullStr Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs
title_full_unstemmed Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs
title_short Effects of Traffic Vibrations on the Flexural Properties of Newly Placed PVA-ECC Bridge Repairs
title_sort effects of traffic vibrations on the flexural properties of newly placed pva-ecc bridge repairs
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829306/
https://www.ncbi.nlm.nih.gov/pubmed/31614921
http://dx.doi.org/10.3390/ma12203337
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