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
Available under license: CC BY-NC-ND
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Experimental study on fire resistance of precast concrete columns with efficient reinforcement
AU - Xu, H.
AU - Yu, M.
AU - Xue, C.
AU - Xu, L.
AU - Ye, J.
N1 - 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
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
AB - 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.
KW - Precast concrete columns
KW - Efficient reinforcement
KW - Cluster reinforcement
KW - Large-diameter reinforcement
KW - Rebar splicing by grout-filled coupling sleeve
KW - Rebar lapping in grout-filled hole
KW - Fire resistance
U2 - 10.1016/j.engstruct.2019.109947
DO - 10.1016/j.engstruct.2019.109947
M3 - Journal article
VL - 204
JO - Engineering Structures
JF - Engineering Structures
SN - 0141-0296
M1 - 109947
ER -