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Cracking of the End Diaphragm of a Post-tensioned Beam Bridge

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Cracking of the End Diaphragm of a Post-tensioned Beam Bridge. / Kuusela, Mikko; Asp, Olli; Laaksonen, Anssi.

julkaisussa: Nordic Concrete Research, Vuosikerta 60, Nro 1, 6, 28.08.2019, s. 89-104.

Tutkimustuotosvertaisarvioitu

Harvard

Kuusela, M, Asp, O & Laaksonen, A 2019, 'Cracking of the End Diaphragm of a Post-tensioned Beam Bridge', Nordic Concrete Research, Vuosikerta. 60, Nro 1, 6, Sivut 89-104. https://doi.org/10.2478/ncr-2019-0001

APA

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Author

Kuusela, Mikko ; Asp, Olli ; Laaksonen, Anssi. / Cracking of the End Diaphragm of a Post-tensioned Beam Bridge. Julkaisussa: Nordic Concrete Research. 2019 ; Vuosikerta 60, Nro 1. Sivut 89-104.

Bibtex - Lataa

@article{8ff9b81701dc45e3a18696659c8ba8d1,
title = "Cracking of the End Diaphragm of a Post-tensioned Beam Bridge",
abstract = "In concrete beam bridges, the end diaphragm at the end of the bridge is a common structural component that connects the main beams and transfers the beam loads to the bridge bearings. In integral bridges the end diaphragm also retains the soil of embankments due to the absence of abutments. Cracking of the front surface on the end diaphragm has been detected in post-tensioned beam bridges in Finland and Sweden. Presumably the post-tensioning of the bridge and the shaping and detailing of the connection of the end diaphragm and main beam have an effect on cracking tendency. The aim of this study is to examine the structural behaviour and the cracking potential of end diaphragms using linear analysis of the post-tensioned bridge and to find measures to prevent the cracking.The observations collected through field surveys are compared to results of linear FE analysis to clarify the cause of the cracking. The verification of model is performed by comparison of patterns of cracking observed in field surveys and the distribution of maximum tensile stresses in the FE model. With model variations, the effectiveness of measures for the prevention of cracking are observed.",
keywords = "Bridge,, post-tensioning,, cracking., concrete,, end diaphragm,",
author = "Mikko Kuusela and Olli Asp and Anssi Laaksonen",
note = "EXT={"}Kuusela, Mikko{"}",
year = "2019",
month = "8",
day = "28",
doi = "10.2478/ncr-2019-0001",
language = "English",
volume = "60",
pages = "89--104",
journal = "Nordic Concrete Research",
issn = "0800-6377",
publisher = "NORDIC CONCRETE FEDERAT",
number = "1",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Cracking of the End Diaphragm of a Post-tensioned Beam Bridge

AU - Kuusela, Mikko

AU - Asp, Olli

AU - Laaksonen, Anssi

N1 - EXT="Kuusela, Mikko"

PY - 2019/8/28

Y1 - 2019/8/28

N2 - In concrete beam bridges, the end diaphragm at the end of the bridge is a common structural component that connects the main beams and transfers the beam loads to the bridge bearings. In integral bridges the end diaphragm also retains the soil of embankments due to the absence of abutments. Cracking of the front surface on the end diaphragm has been detected in post-tensioned beam bridges in Finland and Sweden. Presumably the post-tensioning of the bridge and the shaping and detailing of the connection of the end diaphragm and main beam have an effect on cracking tendency. The aim of this study is to examine the structural behaviour and the cracking potential of end diaphragms using linear analysis of the post-tensioned bridge and to find measures to prevent the cracking.The observations collected through field surveys are compared to results of linear FE analysis to clarify the cause of the cracking. The verification of model is performed by comparison of patterns of cracking observed in field surveys and the distribution of maximum tensile stresses in the FE model. With model variations, the effectiveness of measures for the prevention of cracking are observed.

AB - In concrete beam bridges, the end diaphragm at the end of the bridge is a common structural component that connects the main beams and transfers the beam loads to the bridge bearings. In integral bridges the end diaphragm also retains the soil of embankments due to the absence of abutments. Cracking of the front surface on the end diaphragm has been detected in post-tensioned beam bridges in Finland and Sweden. Presumably the post-tensioning of the bridge and the shaping and detailing of the connection of the end diaphragm and main beam have an effect on cracking tendency. The aim of this study is to examine the structural behaviour and the cracking potential of end diaphragms using linear analysis of the post-tensioned bridge and to find measures to prevent the cracking.The observations collected through field surveys are compared to results of linear FE analysis to clarify the cause of the cracking. The verification of model is performed by comparison of patterns of cracking observed in field surveys and the distribution of maximum tensile stresses in the FE model. With model variations, the effectiveness of measures for the prevention of cracking are observed.

KW - Bridge,

KW - post-tensioning,

KW - cracking.

KW - concrete,

KW - end diaphragm,

U2 - 10.2478/ncr-2019-0001

DO - 10.2478/ncr-2019-0001

M3 - Article

VL - 60

SP - 89

EP - 104

JO - Nordic Concrete Research

JF - Nordic Concrete Research

SN - 0800-6377

IS - 1

M1 - 6

ER -