SHEN Yanli,CHEN Weihu,WEI Bo.Study on Composite Damage Index of Bridge Pier based on Shaking Table Test[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):987-1000.
SHEN Yanli,CHEN Weihu,WEI Bo.Study on Composite Damage Index of Bridge Pier based on Shaking Table Test[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):987-1000. DOI: 10.13409/j.cnki.jdpme.201906050.
Study on Composite Damage Index of Bridge Pier based on Shaking Table Test
To describe the damage of reinforced concrete rectangular hollow pier more accurately, a composite damage index considering displacement and energy was proposed. Based on the shaking table test results of nine reinforced concrete rectangular hollow pier specimens, the displacement damage index, elastic-plastic energy dissipation difference damage index and composite damage index of each specimens were calculated, respectively. The applicability of the composite damage index was verified through the comparison of three damage index results and the statistical analysis of the results under the action of multiple seismic waves. Furthermore, the influence of stirrup ratio, axial compression ratio and reinforcement ratio on damage performance of hollow pier was investigated by using the composite damage index. The results show that the composite damage index values are between displacement and elastic-plastic energy dissipation difference damage index values, and compared with the single damage index, the composite damage index has smaller discreteness. The parameter analyses of hollow pier damage using composite damage index show that the damage degree of piers decreases with the increase of stirrup ratio when the axial compression ratio and reinforcement ratio are constant; the damage degree increases with the increase of axial compression ratio when the stirrup ratio and reinforcement ratio are constant; the damage degree decreases with the increase of reinforcement ratio when the axial compression ratio and stirrup ratio are constant. The results show that the composite damage index can reflect the influence of parameters on the damage performance of piers, and it has good applicability.
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