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SEISMIC PERFORMANCE ANALYSIS OF HRB400 HIGH-STRENGTH REINFORCED CONCRETE COLUMNS
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摘要: 在配有HRB400高强钢筋混凝土墩柱压弯性能试验研究的基础上,利用大型非线性有限元软件ABAQUS对试验墩柱进行模拟仿真分析,较系统地研究混凝土剪胀角、黏性系数和混凝土受拉、受压损伤变量对仿真结果的影响,以及墩柱中高强纵筋的配筋率和布置位置对其抗震性能的影响。结果表明:剪胀角、黏性系数对墩柱承载力的计算值有较大影响,考虑损伤变量能更好地模拟墩柱屈服后刚度的退化;通过合理的参数选择,可以使仿真计算结果与试验实测值基本相符;高强纵筋布置在墩柱受力面的中间位置对墩柱抗震更有利。Abstract: Based on experiment study of HRB400 high-strength reinforced concrete columns under compressingbending loads,the nonlinear finite element program ABAQUS was employed to simulate the tested columns.The influence of dilation angle,viscosity parameter and damage variable of concrete on the simulated results was studied systematically,also the influence of the reinforcement ratio and location of longitudinal high-strength steel bars on the seismic performance of columns.It was shown that dilation angle and viscosity parameter had great influence on the bearing capacity of the columns,and accounting the concrete damage variable could simulate the stiffness degradation of the columns better after yielding.The calculation results could agree with the tested results well by choosing the reasonable simulating parameters.Arranging high-strength steel bars in the centre location of bearing forces side the columns would present better seismic performance．
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Key words:
- seismic performance analysis /
- high-strength reinforced concrete /
- column /
- HRB400 /
- ABAQUS
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