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Finite element crack width computations with a thermo-hygro-mechanical-hydration model for concrete

Jefferson, Anthony Duncan ORCID:, Tenchev, Rosen, Chitez, Adriana, Mihai, Iulia Carmen ORCID:, Garry, Cole and Lyons, Paul 2014. Finite element crack width computations with a thermo-hygro-mechanical-hydration model for concrete. European Journal of Environmental and Civil Engineering 18 (7) , pp. 793-813. 10.1080/19648189.2014.896755

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The paper presents an overview of a finite element approach for the analysis of the thermo-hygro-mechanical-hydration behaviour of concrete structures. The thermo-hygro component considers the mass balance equation of moisture as well as the enthalpy balance equation, and uses two primary variables, namely the capillary pressure and temperature. Heat of hydration is simulated using the approach of Schlinder and Folliard. The basic mechanical model simulates directional cracking, rough crack closure and crushing using a plastic-damage-contact approach. Hydration dependency is introduced into the mechanical constitutive model. The material data from the Concrack benchmark (,2013) are considered with the model. This includes data on adiabatic temperature changes during curing, changing elastic properties during curing, shrinkage and creep. The model, as implemented in the finite element program LUSAS, is used to analyse the Concrack benchmark beam RL1. Particular attention is paid to crack openings and the difference between predicted crack openings from analyses with and without time dependent effects. It is concluded that ignoring time dependent effects can result in a significant under-estimate of crack openings in the working load range.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Additional Information: PDF uploaded in accordance with publisher's policies at (accessed 4.2.16).
Publisher: Taylor & Francis
ISSN: 2116-7214
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 18 February 2014
Last Modified: 04 May 2023 16:15

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