自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 17    No. 5    October 2010

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Post-fire cyclic behavior of reinforced concrete shear walls
LIU Gui-rong(刘桂荣)1, 2, SONG Yu-pu(宋玉普)1, QU Fu-lai(曲福来)2

1. State Key Laboratory of Costal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
2. School of Civil Engineering and Communication,
North China Institute of Water Conservancy and Electric Power, Zhengzhou 450011, China

Abstract:The effects of fire exposure, reinforcement ratio and the presence of axial load under fire on the seismic behavior of reinforced concrete (RC) shear walls were investigated. Five RC shear walls were tested under low cyclic loading. Prior to the cyclic test, three specimens were exposed to fire and two of them were also subjected to a constant axial load. Test results indicate that the ultimate load of the specimen with lower reinforcement ratio is reduced by 15.8% after exposure to elevated temperatures. While the reductions in the energy dissipation and initial stiffness are 59.2% and 51.8%, respectively, which are much higher than those in the ultimate load. However, this deterioration can be slowed down by properly increasing reinforcement due to the strength and stiffness recovery of steel bars after cooling. In addition, the combined action of elevated temperatures and axial load results in more energy dissipation than the action of fire exposure alone.

 

Key words: shear wall; reinforced concrete; post-fire; seismic behavior; low cyclic loading

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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