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  • final_revised_for_comments20190930

    Rights statement: 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

    Accepted author manuscript, 2.63 MB, PDF document

    Embargo ends: 13/12/20

    Available under license: CC BY-NC-ND

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

Research output: Contribution to journalJournal article

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  • H. Xu
  • M. Yu
  • C. Xue
  • L. Xu
  • J. Ye
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Article number109947
<mark>Journal publication date</mark>1/02/2020
<mark>Journal</mark>Engineering Structures
Volume204
Number of pages14
Publication StatusPublished
Early online date13/12/19
<mark>Original language</mark>English

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.

Bibliographic note

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