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: 109947. 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:

?? precast concrete columnsefficient reinforcementcluster reinforcementlarge-diameter reinforcementrebar splicing by grout-filled coupling sleeverebar lapping in grout-filled holefire resistancecivil and structural engineering ??

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