| 摘要: |
| 为研究纤维增强复合材料（FRP）加固高轴压比低强混凝土配筋圆柱的抗震性能，对6根加固柱和3根对比柱进行了低周反复侧向加载试验.结果表明：加固柱的破坏为弯曲破坏，构件的承载力、延性和耗能能力显著改善，对高轴压比低强混凝土柱的加固效果最好；在相同侧向约束应力下，玄武岩纤维布和碳纤维布加固柱承载力相近，但玄武岩纤维布加固柱延性和耗能能力更高.基于试验数据进行回归分析，提出了更广泛轴压比和混凝土强度范围下加固圆柱的峰值荷载和位移延性系数计算式. |
| 关键词: 玄武岩纤维 加固 钢筋混凝土圆柱 低周反复侧向加载 抗震性能 |
| DOI：103969/j.issn.1007 9629202006015 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51208166)；工程结构性能演化与控制教育部重点实验室开放基金项目(2018KF 1)；安徽省自然科学基金资助项目(1408085MKL14) |
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| Seismic Performance of BFRP Reinforced Low Strength Concrete Circular Columns with High Axial Compression Ratio |
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HUANG Jingting1, ZHU Dayong2, GAO Peng1, ZHOU An1, DAI Liangjun3
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1.School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;2.School of Civil Engineering and Architecture, Ningbo Tech University, Ningbo 315100, China;3.Anhui Construction Engineering Group Incorporated Company, Hefei 230001, China
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| Abstract: |
| To investigate the seismic behavior of fiber reinforced plastic(FRP) confined circular reinforced concrete columns with high axial compression ratio and low strength concrete, six confined columns and three control columns were tested under low cyclic lateral load. The results show that after confinement, the failure modes of columns change into flexural failure. The strength, ductility and energy dissipation capacity of columns are improved significantly, and the FRP can provide good confinement especially for columns with high axial compression ratio and low strength concrete. With the same lateral confining stress, the peak load of basalt FRP(BFRP) and carbon FRP(CFRP) confined columns are similar, but the former has better ductility and energy dissipation capacity. Based on the test results, modified equations of peak load and displacement ductility factor are proposed. |
| Key words: basalt fiber strengthening reinforced concrete circular column low cyclic lateral loading seismic performance |
