| 高轴压比CFRP约束钢筋混凝土圆柱抗震性能试验与有限元分析 |
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| 引用本文： | 王震宇,王代玉,吕大刚.高轴压比CFRP约束钢筋混凝土圆柱抗震性能试验与有限元分析[J].土木工程学报,2011(10):1-8. |
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| 作者姓名： | 王震宇 王代玉 吕大刚 |
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| 作者单位： | 哈尔滨工业大学; |
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| 基金项目： | 国家自然科学基金(51078109,50408010); 地震行业科技专项基金(200808073) |
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| 摘 要： | 为研究高轴压比下FRP约束钢筋混凝土圆柱的抗震性能,对6根碳纤维约束钢筋混凝土圆柱及2根对比柱进行伪静力试验。结果表明:塑性铰区包裹碳纤维可显著改善高轴压比柱的抗震性能,轴压比较高时不应忽略箍筋对核心混凝土的约束贡献。基于OpenSees中的纤维模型,对柱水平力-位移滞回曲线进行有限元模拟。轴压比小于0.45时,数值模拟与试验结果吻合较好;轴压比大于0.45时,考虑核心混凝土受箍筋及FRP双重约束的计算结果与试验结果更为接近。分析轴压比、FRP包裹长度等参数对约束柱抗震性能的影响,轴压比大于0.6时,FRP约束混凝土圆柱的水平承载力开始降低;FRP在塑性铰区的包裹长度为1.2倍柱直径时,可达到与全柱包裹相当的效果。
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| 关 键 词： | 碳纤维 约束混凝土 圆柱 抗震性能 OpenSees 有限元分析 |
Experiment and finite element analysis of the seismic behavior of CFRP-confined RC circular columns with high axial compression ratio |
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| Affiliation: | Wang Zhenyu Wang Daiyu Lü Dagang(Harbin Institute of Technology,Harbin 150090,China) |
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| Abstract: | To investigate the seismic behavior of FRP-confined circular RC columns with high axial compression ratio,six columns confined with Carbon Fiber-Reinforced Polymer(CFRP) at plastic hinge region and two control columns were tested under constant axial load and cyclic lateral force.Test results demonstrated marked improvement in the ductility and energy dissipation of the columns due to CFRP wrapping in the plastic hinge region and the contribution of hoops to the confining effect should not be ignored under ... |
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| Keywords: | carbon fiber confined concrete circular column seismic behavior OpenSees finite element analysis |
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