Anisotropic Concrete Compressive Strength in Existing Structures

Søren Gustenhoff Hansen, Nadieh Elisabeth Meinen, Henrik Brøner Jørgensen*

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

Resumé

Assessment of the load‐carrying capacity of existing concrete structures is often based on the concrete compressive strength obtained from drilled cores. These cores are typically drilled perpendicular to the concrete surface, under the assumption that the mechanical properties of the concrete are isotropic. Recent
studies however showed that concrete may in fact be subject to anisotropic behaviour. These studies are limited to newly‐cast concrete only, and little is known about the anisotropic behaviour of existing structures in‐service. This paper presents the first results of a large experimental programme where the anisotropy of the compressive strength in existing concrete structures is investigated. For this, 195 cores, drilled from a large concrete bridge located in Denmark, are tested. Three drilling directions are considered. The results are
analysed using statistical techniques. The results showed that there is a statistically significant difference between the compressive strength in longitudinal and transverse/vertical direction, with an average value of 4.5 MPa in the disadvantage of the longitudinal direction.
OriginalsprogEngelsk
Titel20th Congress of IABSE New York City 2019 : The Evolving Metropolis
ForlagInternational Association for Bridge and Structural Engineering
Publikationsdato2019
ISBN (Trykt)978-3-85748-165-9
StatusUdgivet - 2019
Begivenhed2019 IABSE Congress, New York City, September 4-6, 2019: The Evolving Metropolis - New York City, USA
Varighed: 4. sep. 20196. sep. 2019
http://www.iabse2019.com/

Konference

Konference2019 IABSE Congress, New York City, September 4-6, 2019
LandUSA
ByNew York City
Periode04/09/201906/09/2019
Internetadresse

Fingeraftryk

Compressive strength
Concretes
Concrete construction
Concrete bridges
Drilling
Anisotropy
Mechanical properties

Citer dette

Hansen, S. G., Meinen, N. E., & Jørgensen, H. B. (2019). Anisotropic Concrete Compressive Strength in Existing Structures. I 20th Congress of IABSE New York City 2019: The Evolving Metropolis International Association for Bridge and Structural Engineering.
Hansen, Søren Gustenhoff ; Meinen, Nadieh Elisabeth ; Jørgensen, Henrik Brøner. / Anisotropic Concrete Compressive Strength in Existing Structures. 20th Congress of IABSE New York City 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering, 2019.
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Hansen, SG, Meinen, NE & Jørgensen, HB 2019, Anisotropic Concrete Compressive Strength in Existing Structures. i 20th Congress of IABSE New York City 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering, 2019 IABSE Congress, New York City, September 4-6, 2019, New York City, USA, 04/09/2019.

Anisotropic Concrete Compressive Strength in Existing Structures. / Hansen, Søren Gustenhoff; Meinen, Nadieh Elisabeth; Jørgensen, Henrik Brøner.

20th Congress of IABSE New York City 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering, 2019.

Publikation: Bidrag til bog/antologi/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

TY - GEN

T1 - Anisotropic Concrete Compressive Strength in Existing Structures

AU - Hansen, Søren Gustenhoff

AU - Meinen, Nadieh Elisabeth

AU - Jørgensen, Henrik Brøner

PY - 2019

Y1 - 2019

N2 - Assessment of the load‐carrying capacity of existing concrete structures is often based on the concrete compressive strength obtained from drilled cores. These cores are typically drilled perpendicular to the concrete surface, under the assumption that the mechanical properties of the concrete are isotropic. Recentstudies however showed that concrete may in fact be subject to anisotropic behaviour. These studies are limited to newly‐cast concrete only, and little is known about the anisotropic behaviour of existing structures in‐service. This paper presents the first results of a large experimental programme where the anisotropy of the compressive strength in existing concrete structures is investigated. For this, 195 cores, drilled from a large concrete bridge located in Denmark, are tested. Three drilling directions are considered. The results areanalysed using statistical techniques. The results showed that there is a statistically significant difference between the compressive strength in longitudinal and transverse/vertical direction, with an average value of 4.5 MPa in the disadvantage of the longitudinal direction.

AB - Assessment of the load‐carrying capacity of existing concrete structures is often based on the concrete compressive strength obtained from drilled cores. These cores are typically drilled perpendicular to the concrete surface, under the assumption that the mechanical properties of the concrete are isotropic. Recentstudies however showed that concrete may in fact be subject to anisotropic behaviour. These studies are limited to newly‐cast concrete only, and little is known about the anisotropic behaviour of existing structures in‐service. This paper presents the first results of a large experimental programme where the anisotropy of the compressive strength in existing concrete structures is investigated. For this, 195 cores, drilled from a large concrete bridge located in Denmark, are tested. Three drilling directions are considered. The results areanalysed using statistical techniques. The results showed that there is a statistically significant difference between the compressive strength in longitudinal and transverse/vertical direction, with an average value of 4.5 MPa in the disadvantage of the longitudinal direction.

KW - Compressive Strength

KW - Assessment

KW - Existing structures

KW - Concrete structures

KW - Bridges

KW - Statistical analysis

M3 - Article in proceedings

SN - 978-3-85748-165-9

BT - 20th Congress of IABSE New York City 2019

PB - International Association for Bridge and Structural Engineering

ER -

Hansen SG, Meinen NE, Jørgensen HB. Anisotropic Concrete Compressive Strength in Existing Structures. I 20th Congress of IABSE New York City 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering. 2019