MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING
The time-dependent behavior of concrete members with uniform cross-section subjected to symmetric drying can be predicted with one of many models anchored in the design codes. Since these models use the cross-sectional approach, only the average quantities can be obtained. More complex phenomena can...
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Czech Technical University in Prague
2021-04-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/7196 |
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| author | Pavel Horák Petr Havlásek |
| author_facet | Pavel Horák Petr Havlásek |
| author_sort | Pavel Horák |
| collection | DOAJ |
| description | The time-dependent behavior of concrete members with uniform cross-section subjected to symmetric drying can be predicted with one of many models anchored in the design codes. Since these models use the cross-sectional approach, only the average quantities can be obtained. More complex phenomena can be investigated by means of a coupled hygro-mechanical finite element analysis. Owing to insufficient or missing experimental data, the input parameters for the moisture transport model are often tuned to match the development of axial shrinkage or moisture loss measured on small-scale laboratory specimens. In this paper it is assessed whether this approach leads to a unique set of parameters of the Bažant-Najjar model for moisture diffusion. Additionally, for the selected sets of parameters the analysis is repeated with modified size and/or boundary conditions leading to asymmetric drying and the results are discussed. |
| format | Article |
| id | doaj-art-9a3dae56bf02433780ea4f4e62f3e5ba |
| institution | DOAJ |
| issn | 2336-5382 |
| language | English |
| publishDate | 2021-04-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-9a3dae56bf02433780ea4f4e62f3e5ba2025-08-20T02:51:57ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822021-04-0130243010.14311/APP.2021.30.00244434MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYINGPavel Horák0Petr Havlásek1Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech RepublicCzech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech RepublicThe time-dependent behavior of concrete members with uniform cross-section subjected to symmetric drying can be predicted with one of many models anchored in the design codes. Since these models use the cross-sectional approach, only the average quantities can be obtained. More complex phenomena can be investigated by means of a coupled hygro-mechanical finite element analysis. Owing to insufficient or missing experimental data, the input parameters for the moisture transport model are often tuned to match the development of axial shrinkage or moisture loss measured on small-scale laboratory specimens. In this paper it is assessed whether this approach leads to a unique set of parameters of the Bažant-Najjar model for moisture diffusion. Additionally, for the selected sets of parameters the analysis is repeated with modified size and/or boundary conditions leading to asymmetric drying and the results are discussed.https://ojs.cvut.cz/ojs/index.php/APP/article/view/7196concretedrying shrinkagefinite elementsmoisture transportparameter identification. |
| spellingShingle | Pavel Horák Petr Havlásek MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING Acta Polytechnica CTU Proceedings concrete drying shrinkage finite elements moisture transport parameter identification. |
| title | MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING |
| title_full | MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING |
| title_fullStr | MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING |
| title_full_unstemmed | MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING |
| title_short | MODELING TIME-DEPENDENT DEFORMATIONS OF CONCRETE MEMBERS SUBJECTED TO SYMMETRIC AND ASYMMETRIC DRYING |
| title_sort | modeling time dependent deformations of concrete members subjected to symmetric and asymmetric drying |
| topic | concrete drying shrinkage finite elements moisture transport parameter identification. |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/7196 |
| work_keys_str_mv | AT pavelhorak modelingtimedependentdeformationsofconcretememberssubjectedtosymmetricandasymmetricdrying AT petrhavlasek modelingtimedependentdeformationsofconcretememberssubjectedtosymmetricandasymmetricdrying |