Anisotropic Concrete Compressive Strength in Existing Structures

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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.
Original languageEnglish
Title of host publication20th Congress of IABSE 2019 : The Evolving Metropolis
Number of pages7
PublisherInternational Association for Bridge and Structural Engineering
Publication date2019
ISBN (Print)978-3-85748-165-9
Publication statusPublished - 2019
Event2019 IABSE Congress: The Evolving Metropolis - New York City, United States
Duration: 4. Sep 20196. Sep 2019
http://www.iabse2019.com/

Conference

Conference2019 IABSE Congress
CountryUnited States
CityNew York City
Period04/09/201906/09/2019
Internet address

Fingerprint

Compressive strength
Concretes
Concrete construction
Concrete bridges
Drilling
Anisotropy
Mechanical properties

Keywords

  • Compressive Strength
  • Assessment
  • Existing structures
  • Concrete structures
  • Bridges
  • Statistical analysis

Cite this

Hansen, S. G., Meinen, N. E., & Jørgensen, H. B. (2019). Anisotropic Concrete Compressive Strength in Existing Structures. In 20th Congress of IABSE 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 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering, 2019.
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abstract = "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.",
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Hansen, SG, Meinen, NE & Jørgensen, HB 2019, Anisotropic Concrete Compressive Strength in Existing Structures. in 20th Congress of IABSE 2019: The Evolving Metropolis. International Association for Bridge and Structural Engineering, 2019 IABSE Congress, New York City, United States, 04/09/2019.

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

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

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-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

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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.

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KW - Existing structures

KW - Concrete structures

KW - Bridges

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