Experimental study on fire resistance of precast concrete columns with efficient reinforcement

Xu, H. and Yu, M. and Xue, C. and Xu, L. and Ye, J. (2020) Experimental study on fire resistance of precast concrete columns with efficient reinforcement. Engineering Structures, 204. ISSN 0141-0296

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Abstract

In order to improve installation efficiency, construction quality and reduce the cost of monolithic precast con-crete frame structures, precast concrete columns reinforced by efficient reinforcement have been proposed in recent years. Their static and seismic behaviors generally meet design expectations, while, to the authors’ best knowledge, their fire resistance has not been properly studied. In this paper, results from fire resistance ex-periments on full-scale precast concrete columns reinforced by efficient reinforcement under standard fire ex-posure conditions are presented. The effect of reinforcement forms, load intensity and fire conditions on the fire resistance of the precast concrete columns has been studied. The test results show that fire resistance of the connection zone of the precast concrete column is higher than that of the non-connection zone. The test results also show that precast concrete columns reinforced by cluster reinforcement have a higher fire resistance than columns reinforced by large-diameter reinforcement. On the basis of the test results and the calculation methods current in use, a simplified approach that considers the effect of cross-sectional area reduction and temperature difference caused by spalling is proposed to predict fire resistance of precast concrete columns reinforced by efficient reinforcement.

Item Type: Journal Article
Journal or Publication Title: Engineering Structures
Additional Information: This is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Structures, 204, 2020 DOI: 10.1016/j.engstruct.2019.109947
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2205
Subjects:
Departments: Faculty of Science and Technology > Engineering
ID Code: 139989
Deposited By: ep_importer_pure
Deposited On: 07 Jan 2020 11:50
Refereed?: Yes
Published?: Published
Last Modified: 23 Feb 2020 05:18
URI: https://eprints.lancs.ac.uk/id/eprint/139989

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