Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete
The thermal expansion coefficient and the microscopic thermal stresses of mature concrete depend on its microstructural composition and the internal relative humidity. This dependence is determined by means of thermoelastic multiscale analysis of concrete. The underlying multiscale model enables two...
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doaj-d8e80ea73b9542fbb4d0b6f0f6833cfb2020-11-24T21:49:21ZengMDPI AGMaterials1996-19442019-08-011217268910.3390/ma12172689ma12172689Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature ConcreteHui Wang0Herbert Mang1Yong Yuan2Bernhard L. A. Pichler3College of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaInstitute for Mechanics of Materials and Structures, TU Wien—Vienna University of Technology, Karlsplatz 13/202, 1040 Vienna, AustriaThe thermal expansion coefficient and the microscopic thermal stresses of mature concrete depend on its microstructural composition and the internal relative humidity. This dependence is determined by means of thermoelastic multiscale analysis of concrete. The underlying multiscale model enables two types of scale transition. Firstly, bottom-up homogenization allows for the quantification of the thermal expansion coefficient and the elastic stiffness of concrete based on the Mori-Tanaka scheme. Secondly, top-down scale concentration gives access to the volume averaged stresses experienced by the cement paste, the fine and the coarse aggregates and, furthermore, to the stress states of the interfacial transition zones covering the aggregates. The proposed model is validated by comparing the predicted thermal expansion coefficient of concrete with independent sets of experimental measurements. Finally, sensitivity analyses are carried out to evaluate the influence of the volumetric composition and the internal relative humidity of concrete on the thermal expansion coefficient and the microscopic thermal stresses.https://www.mdpi.com/1996-1944/12/17/2689concretethermal expansionmicrostressesthermoelastictemperature |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hui Wang Herbert Mang Yong Yuan Bernhard L. A. Pichler |
spellingShingle |
Hui Wang Herbert Mang Yong Yuan Bernhard L. A. Pichler Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete Materials concrete thermal expansion microstresses thermoelastic temperature |
author_facet |
Hui Wang Herbert Mang Yong Yuan Bernhard L. A. Pichler |
author_sort |
Hui Wang |
title |
Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete |
title_short |
Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete |
title_full |
Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete |
title_fullStr |
Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete |
title_full_unstemmed |
Multiscale Thermoelastic Analysis of the Thermal Expansion Coefficient and of Microscopic Thermal Stresses of Mature Concrete |
title_sort |
multiscale thermoelastic analysis of the thermal expansion coefficient and of microscopic thermal stresses of mature concrete |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-08-01 |
description |
The thermal expansion coefficient and the microscopic thermal stresses of mature concrete depend on its microstructural composition and the internal relative humidity. This dependence is determined by means of thermoelastic multiscale analysis of concrete. The underlying multiscale model enables two types of scale transition. Firstly, bottom-up homogenization allows for the quantification of the thermal expansion coefficient and the elastic stiffness of concrete based on the Mori-Tanaka scheme. Secondly, top-down scale concentration gives access to the volume averaged stresses experienced by the cement paste, the fine and the coarse aggregates and, furthermore, to the stress states of the interfacial transition zones covering the aggregates. The proposed model is validated by comparing the predicted thermal expansion coefficient of concrete with independent sets of experimental measurements. Finally, sensitivity analyses are carried out to evaluate the influence of the volumetric composition and the internal relative humidity of concrete on the thermal expansion coefficient and the microscopic thermal stresses. |
topic |
concrete thermal expansion microstresses thermoelastic temperature |
url |
https://www.mdpi.com/1996-1944/12/17/2689 |
work_keys_str_mv |
AT huiwang multiscalethermoelasticanalysisofthethermalexpansioncoefficientandofmicroscopicthermalstressesofmatureconcrete AT herbertmang multiscalethermoelasticanalysisofthethermalexpansioncoefficientandofmicroscopicthermalstressesofmatureconcrete AT yongyuan multiscalethermoelasticanalysisofthethermalexpansioncoefficientandofmicroscopicthermalstressesofmatureconcrete AT bernhardlapichler multiscalethermoelasticanalysisofthethermalexpansioncoefficientandofmicroscopicthermalstressesofmatureconcrete |
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1725887880857911296 |