Experimental study into the behaviour of profiled composite walls under combined axial and thermal loadings

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Experimental study into the behaviour of profiled composite walls under combined axial and thermal loadings

Le, QX; Dao, VTN; Torero, JL; Ngo, TD; (2020) Experimental study into the behaviour of profiled composite walls under combined axial and thermal loadings. Engineering Structures , 210 , Article 110354. 10.1016/j.engstruct.2020.110354. Green open access

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Abstract

Profiled composite walls (PCWs) are regularly used in construction because they provide enhanced ductility, shear resistance and damage tolerance when compared to traditional reinforced concrete walls. Although much research has been conducted to understand the structural performance of PCWs at ambient temperature, studies into their performance at high temperatures remain limited. In this work, a comprehensive set of experiments has been conducted to investigate the performance of PCWs at both ambient and elevated temperatures. A heat source comprising of radiant burners and 1MN MTS machine were employed to deliver known and actively controlled thermal and structural boundary conditions on the PCW samples. The experiments were conducted to understand the effects of an incident heat flux when combined with loads. The results from this study have shown that (i) the axial load capacity of PCWs decreases as the temperature increases; (ii) the PCWs tends to exhibit ductile failure modes when cold but brittle failure at high temperature; (iii) due to thermal bowing, the failure plane of the PCWs subjected to one-side heating shifts closer to the heating source; and (iv) applying a load in an eccentric manner can compensate for the effect of temperature gradient.

Type:	Article
Title:	Experimental study into the behaviour of profiled composite walls under combined axial and thermal loadings
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1016/j.engstruct.2020.110354
Publisher version:	https://doi.org/10.1016/j.engstruct.2020.110354
Language:	English
Additional information:	This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords:	Temperature gradient, Failure modes, Failure plane, Axial load capacity, Profiled composite wall
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI:	https://discovery.ucl.ac.uk/id/eprint/10094131