Shear capacity of ASR damaged structures – in-depth analysis of some in-situ shear tests on bridge slabs

Søren Gustenhoff Hansen, Ricardo Antonio Barbosa, Linh Cao Hoang, Kurt Kielsgaard Hansen

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Abstract

This paper deals with the influence of alkali-silica reaction (ASR) on the shear capacity for concrete slabs without shear reinforcement. An experimental full-scale in-situ program consisting of four slabs from a bridge (Vosnæsvej) has been carried out and the results have been published in ref. [1] with the principal author of this paper as co-author. After the experiments, a detailed measurement of the test specimens was conducted. Based on these measurements a thorough analysis of the experimental results was carried out and evaluated by a plastic model for shear capacity, Crack Sliding Model (CSM) and Eurocode 2 (EN 1992-1-1). The analysis shows that three experiments were highly affected by the preparation of the experimental setup. Only one experiment contained useful information about the shear capacity. The analysis of this experiment shows that the shear capacity is not reduced as much as the measured concrete compressive strength indicates. Furthermore, the analysis shows that the ASR-induced prestress may be the reason for this phenomenon.
Original languageEnglish
Title of host publicationProceedings of the 15th international conference on alkali-aggregate reaction in concrete (15th ICAAR)
Number of pages10
Publication date2016
Publication statusPublished - 2016
Event15th International Conference on Alkali-Aggregate Reaction in Concrete - São Paulo, Brazil
Duration: 3 Jul 20167 Jul 2016
Conference number: 15

Conference

Conference15th International Conference on Alkali-Aggregate Reaction in Concrete
Number15
Country/TerritoryBrazil
CitySão Paulo
Period03/07/201607/07/2016

Bibliographical note

ISSN 2525-4189

Keywords

  • Alkali silica reaction
  • Shear capacity
  • Full scale testing
  • Crack sliding model
  • Failure analysis

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