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Seismic performance of reinforced concrete columns after freeze–thaw cycles
Highlights Eight RC columns subjected to freeze–thaw cycles under low cyclic loading were tested. Effect of freeze–thaw cycles and axial compression ratios on the seismic performance of RC columns were investigated.
Abstract The purpose of this study is to investigate the seismic performance of reinforced concrete columns after freeze–thaw cycles. Based on low cyclic loading tests of eight column specimens, the failure patterns, hysteresis loops, load carrying capacity, displacement and ductility factor, skeleton curves, stiffness degradation and energy dissipation capacity of frost-damaged concrete columns were analyzed. The effect of freeze–thaw cycles and axial compression ratios were investigated in detail. Test results show that for the column specimens under the same level of axial compression, with the number of freeze–thaw cycles increasing from 0 to 300, the plastic deformation capacity decreased whereas the rate of stiffness degeneration and strength decay increased continuously. The coupling effect of the deterioration of material and loosening of bond induced the value of equivalent viscous damping coefficients to decrease at first then increase, however, the cumulative energy dissipation decreased continuously. Test results also indicate that for the column specimens with the same level of frost damage, with the increase of axial compression ratio, the load carrying capacity and initial stiffness increased, whereas the deformability capacity, the equivalent viscous damping coefficients and the cumulative energy dissipation decreased obviously, respectively.
Seismic performance of reinforced concrete columns after freeze–thaw cycles
Highlights Eight RC columns subjected to freeze–thaw cycles under low cyclic loading were tested. Effect of freeze–thaw cycles and axial compression ratios on the seismic performance of RC columns were investigated.
Abstract The purpose of this study is to investigate the seismic performance of reinforced concrete columns after freeze–thaw cycles. Based on low cyclic loading tests of eight column specimens, the failure patterns, hysteresis loops, load carrying capacity, displacement and ductility factor, skeleton curves, stiffness degradation and energy dissipation capacity of frost-damaged concrete columns were analyzed. The effect of freeze–thaw cycles and axial compression ratios were investigated in detail. Test results show that for the column specimens under the same level of axial compression, with the number of freeze–thaw cycles increasing from 0 to 300, the plastic deformation capacity decreased whereas the rate of stiffness degeneration and strength decay increased continuously. The coupling effect of the deterioration of material and loosening of bond induced the value of equivalent viscous damping coefficients to decrease at first then increase, however, the cumulative energy dissipation decreased continuously. Test results also indicate that for the column specimens with the same level of frost damage, with the increase of axial compression ratio, the load carrying capacity and initial stiffness increased, whereas the deformability capacity, the equivalent viscous damping coefficients and the cumulative energy dissipation decreased obviously, respectively.
Seismic performance of reinforced concrete columns after freeze–thaw cycles
Xu, Shanhua (author) / Li, Anbang (author) / Ji, Zengyang (author) / Wang, Yan (author)
Construction and Building Materials ; 102 ; 861-871
2015-10-28
11 pages
Article (Journal)
Electronic Resource
English
Seismic performance of reinforced concrete columns after freeze–thaw cycles
| British Library Online Contents | 2016
Seismic performance of reinforced concrete columns after freeze–thaw cycles
| Online Contents | 2016
Seismic performance of reinforced concrete columns after freeze–thaw cycles
| Online Contents | 2016
| British Library Online Contents | 2018