| 不同轴压比钢筋混凝土圆柱桥墩地震易损性分析 |
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| 引用本文： | 赵建锋,孙伟帅,李刚.不同轴压比钢筋混凝土圆柱桥墩地震易损性分析[J].世界地震工程,2018,34(4):031-37. |
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| 作者姓名： | 赵建锋 孙伟帅 李刚 |
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| 作者单位： | 青岛理工大学 土木工程学院, 山东 青岛 266033 |
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| 摘 要： | 以墩顶漂移率为指标运用ABAQUS有限元软件对钢筋混凝土桥墩进行地震易损性分析。对钢筋混凝土桥墩模型进行精细网格划分，运用循环往复Pushover方法模拟钢筋混凝土桥墩破坏界限值，以此界限值为标准对轴压比为0.20、0.22、0.24、0.26和0.30钢筋混凝土桥墩进行增量动力分析（IDA）。研究结果表明:结构的破坏超越概率，随着轴压比的增大而增大；考虑钢筋混凝土桥墩延性抗震性能，设计轴压比不宜超过0.30；轴压比为0.24~0.26时，钢筋混凝土桥墩破坏概率增加不大，宜为合理的轴压比。
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| 关 键 词： | 循环往复Pushover 增量动力分析(IDA) 地震易损性 轴压比 超越概率 |
Seismic vulnerability analysis of cylindrical RC bridge piers with different axial compression ratios |
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| ZHAO Jianfeng,SUN Weishuai,LI Gang.Seismic vulnerability analysis of cylindrical RC bridge piers with different axial compression ratios[J].World Information On Earthquake Engineering,2018,34(4):031-37. |
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| Authors: | ZHAO Jianfeng SUN Weishuai LI Gang |
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| Affiliation: | School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China |
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| Abstract: | Finite element analysis software ABAQUS was used to analyze seismic vulnerability of reinforced concrete (RC) bridge piers based on drift ratio of the top of piers. The model of the RC bridge piers was divided into fine meshes, and the cyclic Pushover method was used to simulate the failure limit values of the piers. With these limit values as the standard, incremental dynamic analysis (IDA) was carried out for the RC bridge piers with axial compression ratios of 0.20, 0.22, 0.24, 0.26 and 0.30. The results are as follows. The exceedance probability of the structure failure increases with the increase of the axial compression ratios. Considering ductility seismic performances of the RC bridge piers, the design axial compression ratio of structure should not exceed 0.30. When the axial compression ratios range from 0.24-0.26, the failure probability of the RC bridge piers increases slightly, which proved the range is reasonable. |
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| Keywords: | cyclic Pushover analysis method incremental dynamic analysis (IDA) seismic vulnerability axial compression ratio exceedance probability |
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