gallery:multiscaleheattransport
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Hydrating concrete produces significant amount of hydration heat, which causes several problems in massive concrete elements. Multiscale simulation helped to find an optimal position of cooling pipes and cooling regime on an arch of Opárno bridge, Czech republic. The bridge was built during 2008-2010 with the arches spanning 135 m, see Figures. | Hydrating concrete produces significant amount of hydration heat, which causes several problems in massive concrete elements. Multiscale simulation helped to find an optimal position of cooling pipes and cooling regime on an arch of Opárno bridge, Czech republic. The bridge was built during 2008-2010 with the arches spanning 135 m, see Figures. | ||
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- Structural level. The heat balance equation is solved with finite elements. Several finite elements are grouped together and mapped to one CEMHYD3D instance. Nine OOFEM' | - Structural level. The heat balance equation is solved with finite elements. Several finite elements are grouped together and mapped to one CEMHYD3D instance. Nine OOFEM' | ||
- | The Figures below show evolution of temperature during concrete hardening. The simulation runs on a left symmetric part of the arch cross-section. Optimal position of cooling pipes is apparent. Note that the cooling turns off after several hours which detaches natural Dirichlet' | + | The Figures below show temperature |
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- | The flat bottom subfigure shows the 2D triangular mesh and the assignment of hydration models to groups of finite elements on the cross-section. The right Figure validates the multiscale simulation with the temperature in the core of the cross-section. Temperature remained below 65C during summer casting, which was found acceptable. | + | |
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- | {{:gallery:oparno_02.mpeg|}} | + | {{mpeg> |
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- | //Created 12/2010 by Vít Šmilauer. Acknowledgements belong to B. Patzák, Z. Bittnar, J. L. Vítek and Pontex Consulting Engineers, Ltd.// | + | //Created 12/2010 by Vít Šmilauer. Acknowledgements belong |
gallery/multiscaleheattransport.txt · Last modified: 2013/04/15 15:30 by bp