Tests and limit analysis of loop connections between precast concrete elements loaded in tension

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

This paper deals with loop connections loaded in tension. Such connections; also known as U-bar joints, are frequently used in practice to establish continuity between precast deck elements in steel–concrete composite bridges. The tensile strength of a loop connection may either be governed by yielding of the U-bars or by failure in the joint concrete. Only few investigations of the case of concrete failure can be found in the literature. This paper presents an experimental program dedicated to study loop connections critical to concrete failure. The results show that the ultimate load is influenced by important design parameters such as the overlapping length of the U-bars, the spacing between adjacent U-bars and the amount of transverse reinforcement. Knowledge about the parameters that have an effect on the failure of the joint concrete is important in order to avoid this failure mode in practice. The paper also presents an upper bound plasticity model, which is able to capture the experimental tendencies in a satisfactory manner. Finally, the paper includes discussions of how the presented research may be utilized in practice to design connections that are able to transfer the full yield strength of the connecting precast elements.
OriginalsprogEngelsk
TidsskriftEngineering Structures
Vol/bind52
Sider (fra-til)558-569
Antal sider12
ISSN0141-0296
DOI
StatusUdgivet - jul. 2013

Fingeraftryk

Precast concrete
Concretes
Composite bridges
Failure modes
Plasticity
Yield stress
Reinforcement
Tensile strength

Citer dette

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title = "Tests and limit analysis of loop connections between precast concrete elements loaded in tension",
abstract = "This paper deals with loop connections loaded in tension. Such connections; also known as U-bar joints, are frequently used in practice to establish continuity between precast deck elements in steel–concrete composite bridges. The tensile strength of a loop connection may either be governed by yielding of the U-bars or by failure in the joint concrete. Only few investigations of the case of concrete failure can be found in the literature. This paper presents an experimental program dedicated to study loop connections critical to concrete failure. The results show that the ultimate load is influenced by important design parameters such as the overlapping length of the U-bars, the spacing between adjacent U-bars and the amount of transverse reinforcement. Knowledge about the parameters that have an effect on the failure of the joint concrete is important in order to avoid this failure mode in practice. The paper also presents an upper bound plasticity model, which is able to capture the experimental tendencies in a satisfactory manner. Finally, the paper includes discussions of how the presented research may be utilized in practice to design connections that are able to transfer the full yield strength of the connecting precast elements.",
keywords = "Loop connections, In situ concrete joints, U-bars, Composite bridges, Precast deck elements, Tensile strength",
author = "J{\o}rgensen, {Henrik Br{\o}ner} and Hoang, {Linh Cao}",
year = "2013",
month = "7",
doi = "10.1016/j.engstruct.2013.03.015",
language = "English",
volume = "52",
pages = "558--569",
journal = "Engineering Structures",
issn = "0141-0296",
publisher = "Pergamon Press",

}

Tests and limit analysis of loop connections between precast concrete elements loaded in tension. / Jørgensen, Henrik Brøner; Hoang, Linh Cao.

I: Engineering Structures, Bind 52, 07.2013, s. 558-569.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Tests and limit analysis of loop connections between precast concrete elements loaded in tension

AU - Jørgensen, Henrik Brøner

AU - Hoang, Linh Cao

PY - 2013/7

Y1 - 2013/7

N2 - This paper deals with loop connections loaded in tension. Such connections; also known as U-bar joints, are frequently used in practice to establish continuity between precast deck elements in steel–concrete composite bridges. The tensile strength of a loop connection may either be governed by yielding of the U-bars or by failure in the joint concrete. Only few investigations of the case of concrete failure can be found in the literature. This paper presents an experimental program dedicated to study loop connections critical to concrete failure. The results show that the ultimate load is influenced by important design parameters such as the overlapping length of the U-bars, the spacing between adjacent U-bars and the amount of transverse reinforcement. Knowledge about the parameters that have an effect on the failure of the joint concrete is important in order to avoid this failure mode in practice. The paper also presents an upper bound plasticity model, which is able to capture the experimental tendencies in a satisfactory manner. Finally, the paper includes discussions of how the presented research may be utilized in practice to design connections that are able to transfer the full yield strength of the connecting precast elements.

AB - This paper deals with loop connections loaded in tension. Such connections; also known as U-bar joints, are frequently used in practice to establish continuity between precast deck elements in steel–concrete composite bridges. The tensile strength of a loop connection may either be governed by yielding of the U-bars or by failure in the joint concrete. Only few investigations of the case of concrete failure can be found in the literature. This paper presents an experimental program dedicated to study loop connections critical to concrete failure. The results show that the ultimate load is influenced by important design parameters such as the overlapping length of the U-bars, the spacing between adjacent U-bars and the amount of transverse reinforcement. Knowledge about the parameters that have an effect on the failure of the joint concrete is important in order to avoid this failure mode in practice. The paper also presents an upper bound plasticity model, which is able to capture the experimental tendencies in a satisfactory manner. Finally, the paper includes discussions of how the presented research may be utilized in practice to design connections that are able to transfer the full yield strength of the connecting precast elements.

KW - Loop connections

KW - In situ concrete joints

KW - U-bars

KW - Composite bridges

KW - Precast deck elements

KW - Tensile strength

U2 - 10.1016/j.engstruct.2013.03.015

DO - 10.1016/j.engstruct.2013.03.015

M3 - Journal article

VL - 52

SP - 558

EP - 569

JO - Engineering Structures

JF - Engineering Structures

SN - 0141-0296

ER -