Post-fire cyclic behavior of reinforced concrete shear walls |
| |
Authors: | Gui-rong Liu Yu-pu Song and Fu-lai Qu |
| |
Affiliation: | (1) Department of Civil Engineering, University of Patras, P.O. Box 1424, 26504 Patras, Greece; |
| |
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. |
| |
Keywords: | shear wall reinforced concrete post-fire seismic behavior low cyclic loading |
本文献已被 维普 万方数据 SpringerLink 等数据库收录! |
|