Experimental and numerical analysis of a walls made from aerated concrete blocks exposed to fire
Authors
Mirković-Marjanović, MilicaKijanović, Aleksandar
Ilić, Snežana
Todorović, Goran
Gospavić, Radovan
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The unsteady heat conduction in composite planar structure, with arbitrary number of layers, using analytical approach based on Greeds Functions (GF) is analyzed. The analytical solution for spatial and temporal temperature distribution is evaluated in the general form and expressed in the terms of the convolution integrals. The GF are employed in the novel approach for calculation of Thermal Response Factors (TRF) with arbitrary shape functions for unsteady heat conduction in composite planar structure. The two pairs of TRF for spatial and temporal distribution of the temperature and the thermal flux are obtained. The whole analysis is performed in the time domain. A numerical scheme for efficient evaluation of convolution integral suitable for practical application in the case of the long term measurements with lower sampling rates is developed. The in-situ measurements of inside and outside surface temperatures and outside heat flux for a building wall under real dynamical environme...ntal conditions during the period of then days are used for validation of the presented results and to demonstrate the possible practical application. Using developed approach and recorded surface temperatures as inputs the temporal and spatial distributions of the temperature and the thermal flux are obtained. These results are compared with experimental data and numerical simulations obtained by the Finite Volume Method (FVM).
Keywords:
numerical one-dimensional (1D) non-stationary calculation / fire condition / autoclaved aerated concrete / thermal behavior / different thicknesses of a wallSource:
Proceedings of the 19th International Symposium MASE, Ohrid, 2022, 2022, 583-590Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200012 (Istitute of Material Testing of Serbia - IMS, Belgrade) (RS-MESTD-inst-2020-200012)
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Institut za ispitivanje materijalaTY - CONF AU - Mirković-Marjanović, Milica AU - Kijanović, Aleksandar AU - Ilić, Snežana AU - Todorović, Goran AU - Gospavić, Radovan PY - 2022 UR - http://rims.institutims.rs/handle/123456789/435 AB - The unsteady heat conduction in composite planar structure, with arbitrary number of layers, using analytical approach based on Greeds Functions (GF) is analyzed. The analytical solution for spatial and temporal temperature distribution is evaluated in the general form and expressed in the terms of the convolution integrals. The GF are employed in the novel approach for calculation of Thermal Response Factors (TRF) with arbitrary shape functions for unsteady heat conduction in composite planar structure. The two pairs of TRF for spatial and temporal distribution of the temperature and the thermal flux are obtained. The whole analysis is performed in the time domain. A numerical scheme for efficient evaluation of convolution integral suitable for practical application in the case of the long term measurements with lower sampling rates is developed. The in-situ measurements of inside and outside surface temperatures and outside heat flux for a building wall under real dynamical environmental conditions during the period of then days are used for validation of the presented results and to demonstrate the possible practical application. Using developed approach and recorded surface temperatures as inputs the temporal and spatial distributions of the temperature and the thermal flux are obtained. These results are compared with experimental data and numerical simulations obtained by the Finite Volume Method (FVM). C3 - Proceedings of the 19th International Symposium MASE, Ohrid, 2022 T1 - Experimental and numerical analysis of a walls made from aerated concrete blocks exposed to fire EP - 590 SP - 583 UR - https://hdl.handle.net/21.15107/rcub_rims_435 ER -
@conference{ author = "Mirković-Marjanović, Milica and Kijanović, Aleksandar and Ilić, Snežana and Todorović, Goran and Gospavić, Radovan", year = "2022", abstract = "The unsteady heat conduction in composite planar structure, with arbitrary number of layers, using analytical approach based on Greeds Functions (GF) is analyzed. The analytical solution for spatial and temporal temperature distribution is evaluated in the general form and expressed in the terms of the convolution integrals. The GF are employed in the novel approach for calculation of Thermal Response Factors (TRF) with arbitrary shape functions for unsteady heat conduction in composite planar structure. The two pairs of TRF for spatial and temporal distribution of the temperature and the thermal flux are obtained. The whole analysis is performed in the time domain. A numerical scheme for efficient evaluation of convolution integral suitable for practical application in the case of the long term measurements with lower sampling rates is developed. The in-situ measurements of inside and outside surface temperatures and outside heat flux for a building wall under real dynamical environmental conditions during the period of then days are used for validation of the presented results and to demonstrate the possible practical application. Using developed approach and recorded surface temperatures as inputs the temporal and spatial distributions of the temperature and the thermal flux are obtained. These results are compared with experimental data and numerical simulations obtained by the Finite Volume Method (FVM).", journal = "Proceedings of the 19th International Symposium MASE, Ohrid, 2022", title = "Experimental and numerical analysis of a walls made from aerated concrete blocks exposed to fire", pages = "590-583", url = "https://hdl.handle.net/21.15107/rcub_rims_435" }
Mirković-Marjanović, M., Kijanović, A., Ilić, S., Todorović, G.,& Gospavić, R.. (2022). Experimental and numerical analysis of a walls made from aerated concrete blocks exposed to fire. in Proceedings of the 19th International Symposium MASE, Ohrid, 2022, 583-590. https://hdl.handle.net/21.15107/rcub_rims_435
Mirković-Marjanović M, Kijanović A, Ilić S, Todorović G, Gospavić R. Experimental and numerical analysis of a walls made from aerated concrete blocks exposed to fire. in Proceedings of the 19th International Symposium MASE, Ohrid, 2022. 2022;:583-590. https://hdl.handle.net/21.15107/rcub_rims_435 .
Mirković-Marjanović, Milica, Kijanović, Aleksandar, Ilić, Snežana, Todorović, Goran, Gospavić, Radovan, "Experimental and numerical analysis of a walls made from aerated concrete blocks exposed to fire" in Proceedings of the 19th International Symposium MASE, Ohrid, 2022 (2022):583-590, https://hdl.handle.net/21.15107/rcub_rims_435 .