MODELING ALKALI-SILICA-REACTION IN REINFORCED CONCRETE STRUCTURES COMBINING KINETICS AND FRACTURE MECHANICS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28399269%3A_____%2F18%3AN0000009" target="_blank" >RIV/28399269:_____/18:N0000009 - isvavai.cz</a>

Result on the web

<a href="http://www.eccm-ecfd2018.org/admin/files/filePaper/p390.pdf" target="_blank" >http://www.eccm-ecfd2018.org/admin/files/filePaper/p390.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

MODELING ALKALI-SILICA-REACTION IN REINFORCED CONCRETE STRUCTURES COMBINING KINETICS AND FRACTURE MECHANICS

Original language description

Alkali-silica reaction (ASR) is a reaction in concrete between alkali hydroxides and reactive siliceous aggregates. The paper presents a chemo-mechanical weakly coupled model for ASR. The chemical model predicts kinetics and volume expansion of macroscopicallyunrestrained specimens. The volumetric strain depends on aggregate composition, characteristic and latency time, moisture ambient conditions and temperature. The mechanical material model is formulated on a macro scale, taking unrestrained volumetric strain as the main input. The volumetric strain governs deterioration of material characteristics (tensile strength, compressive strength, fracture energy) and contributes as an eigenstrain to material behaviour. The growths of ASR gel follows stress state where high compression inhibits further expansion and prevents further deterioration. A fracture-plastic material model for concrete delivers strain decomposition, stress, damage and plastic behaviour. Validation focuses on macroscopically stress-free specimens where correct expansion is obtained. An example of reinforced concrete beam shows excellent performance for internally restrained concrete. The model has been implemented in ATENA software and extends its capability to examine lifetime of the structure.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

Project

<a href="/en/project/7D17001" target="_blank" >7D17001: BIM - based Cyber-physical System for Bridge Assessment</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 6th. European Conference on Computational Mechanics (Solids, Structures and Coupled Problems) ECCM 6 7th. European Conference on Computational Fluid Dynamics ECFD 7

ISBN

978-84-947311-6-7

ISSN

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e-ISSN

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Number of pages

12

Pages from-to

1211-1222

Publisher name

International Center for Numerical Methods in Engineerin (CIMNE)

Place of publication

Barcelona, Spain

Event location

Glasgow, Scotland, UK

Event date

Jun 11, 2018

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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