THERMAL SCIENCE

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Ahmet Emin Kurtoğlu

,

Derya Bakbak

NEW MODEL FOR COMPRESSIVE STRENGTH LOSS OF LIGHTWEIGHT CONCRETE EXPOSED TO ELEVATED TEMPERATURES

ABSTRACT
This study proposes a new model for the residual compressive strength of structural lightweight concrete after exposure to elevated temperatures up to 1000 °C. For this purpose, a database of residual compressive strengths of fire exposed lightweight concrete was compiled from the literature. Database consisted a total number of 289 data points, used for generating training and testing datasets. Symbolic regression was carried out to generate formulations by accounting for various input parameters such as heating rate, cooling regime, target temperature, water content, aggregate tyğe and aggregate content. Afterwards, predictions of proposed formulation is compared to experimental results. Statistical evaluations verify that the prediction performance of proposed model is quite high.
KEYWORDS
Lightweight concrete, high temperature, compressive strength, symbolic regression, modeling
PAPER SUBMITTED: 2018-10-30
PAPER REVISED: 2018-11-20
PAPER ACCEPTED: 2019-01-13
PUBLISHED ONLINE: 2019-03-09
DOI REFERENCE: https://doi.org/10.2298/TSCI181030042K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Supplement 1, PAGES [S285 - S293]
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New model for compressive strength loss of lightweight concrete exposed to elevated temperatures

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