Seismic behavior of steel reinforced ultra high strength concrete column and reinforced concrete beam connection |
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Authors: | YAN Changwang JIA Jinqing ZHANG Ju |
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Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;School of Mining and Technology,Inner Mongolia University of Technology,Hohhot 010051,China 2. State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China 3. School of Mining and Technology,Inner Mongolia University of Technology,Hohhot 010051,China |
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Abstract: | To investigate the seismic behavior of connections composed of steel reinforced ultra high strength concrete (SRUHSC) column
and reinforced concrete (RC) beam, six interior strong-column-weak-beam connection specimens were tested subjected to reversal
cyclic load. Effects of applied axial load ratio and volumetric stirrup ratio on ductility, energy dissipation capacity, strength
degradation and rigidity degradation were discussed. It was found that all connection specimens failed in bending in a ductile
manner with a beam plastic hinge. The ductility and energy dissipation capacity increased with the decrease of applied axial
load ratio or increase of volumetric stirrup ratio. The displacement ductility coefficient and equivalent damping coefficient
lay between those of steel reinforced ordinary concrete connection and those of reinforced concrete connection. The applied
axial load ratio and volumetric stirrup ratio had less influence on the strength degradation and more influence on the stiffness
degradation. The stiffness degraded sharply with the decrease of volumetric stirrup ratio or increase of applied axial load
ratio. The experimental results indicate that SRUHSC column and RC beam connection exhibited better seismic performance and
can provide reference for engineering application. |
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Keywords: | seismic performance steel reinforced ultra high strength concrete connection applied axial load ratio volumetric stirrup ratio |
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