Characterization of mixed mode crack opening in concrete

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Characterization of mixed mode crack opening in concrete. / Jacobsen, Jonas Sejersbøl; Poulsen, Peter Noe; Olesen, John Forbes.

In: Materials and Structures, Vol. 45, No. 1-2, 2012, p. 107-122.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Author

Jacobsen, Jonas Sejersbøl; Poulsen, Peter Noe; Olesen, John Forbes / Characterization of mixed mode crack opening in concrete.

In: Materials and Structures, Vol. 45, No. 1-2, 2012, p. 107-122.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{3993def0dc6b477bbde9f2aeddd77b39,
title = "Characterization of mixed mode crack opening in concrete",
keywords = "Biaxial loading, Constitutive behavior, Mixed mode fracture, Concrete",
publisher = "Springer Netherlands",
author = "Jacobsen, {Jonas Sejersbøl} and Poulsen, {Peter Noe} and Olesen, {John Forbes}",
year = "2012",
doi = "10.1617/s11527-011-9754-5",
volume = "45",
number = "1-2",
pages = "107--122",
journal = "Materials and Structures",
issn = "1359-5997",

}

RIS

TY - JOUR

T1 - Characterization of mixed mode crack opening in concrete

A1 - Jacobsen,Jonas Sejersbøl

A1 - Poulsen,Peter Noe

A1 - Olesen,John Forbes

AU - Jacobsen,Jonas Sejersbøl

AU - Poulsen,Peter Noe

AU - Olesen,John Forbes

PB - Springer Netherlands

PY - 2012

Y1 - 2012

N2 - In real concrete structures cracks often open in mixed mode after their initiation. To capture the direct material behavior of a mixed mode crack opening a stiff biaxial testing machine, capable of imposing both normal and shear loads on a given crack area, has been applied. The opening and sliding components of the mixed mode displacement are measured using a custom made orthogonal gauge, and the measurements are used directly as the closed loop control signals. A double notch, concrete specimen is used for the crack investigation. The tests are divided into two steps, a pure Mode I opening step, where a macro crack is initiated in the specimen followed by the mixed mode opening step. The high stiffness of the set-up together with the closed control loop ensures a stable crack initiation followed by a controllable mixed mode opening. The deep notches result in a plane crack, only influenced by material aspects such as the aggregate size and concrete strength. Despite the occurrence of a few, local, secondary cracks during the mixed mode crack opening, the results can be treated as the mixed mode material point behavior of a crack in concrete. Results are reported for a range of mixed mode angles and for varying initial Mode I openings of the crack.

AB - In real concrete structures cracks often open in mixed mode after their initiation. To capture the direct material behavior of a mixed mode crack opening a stiff biaxial testing machine, capable of imposing both normal and shear loads on a given crack area, has been applied. The opening and sliding components of the mixed mode displacement are measured using a custom made orthogonal gauge, and the measurements are used directly as the closed loop control signals. A double notch, concrete specimen is used for the crack investigation. The tests are divided into two steps, a pure Mode I opening step, where a macro crack is initiated in the specimen followed by the mixed mode opening step. The high stiffness of the set-up together with the closed control loop ensures a stable crack initiation followed by a controllable mixed mode opening. The deep notches result in a plane crack, only influenced by material aspects such as the aggregate size and concrete strength. Despite the occurrence of a few, local, secondary cracks during the mixed mode crack opening, the results can be treated as the mixed mode material point behavior of a crack in concrete. Results are reported for a range of mixed mode angles and for varying initial Mode I openings of the crack.

KW - Biaxial loading

KW - Constitutive behavior

KW - Mixed mode fracture

KW - Concrete

U2 - 10.1617/s11527-011-9754-5

DO - 10.1617/s11527-011-9754-5

JO - Materials and Structures

JF - Materials and Structures

SN - 1359-5997

IS - 1-2

VL - 45

SP - 107

EP - 122

ER -