Parameter estimation for heat conduction in crumb-rubber modi- fied mortar: comparison of different optimisation methods

Author(s): S. Yang, Neven Ukrainczyk, R. Falcone, E. Martinelli, E. A. B.
Paper category: Proceedings
Book title: International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) Energy Efficient Building Design and Legislation
Editor(s): Marina Bagarić, Ivana Banjad Pečur, Hartwig M. Künzel
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 25-33
Total Pages: 09
Language: English

Abstract: Parameter estimation of heat conduction properties of construction materials plays an important role in green building and sustainable design. Based on a heat conduction problem solved through a numerical method, an inverse problem rises. The thermal conductivity of each component of crumb-rubber-modified mortars (quartz sand, crumb rubber, cement paste and air void) was estimated though three methods of minimization of the least-squares norm: the Levenberg-Marquardt method, Nelder-Mead Simplex Method, and Genetic Algorithm. The performances of these methods were compared in terms of the computational time with different number of parameters (from 1 to 4) and two accuracy levels for stopping criteria. These methods were able to converge to the parameters values, in good agreement with the literature values. Because of high efficiency and accuracy, the Levenberg-Marquardt method outperformed the other methods.

Online publication: 2019
Publication type : full_text
Public price (Euros): 0.00

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