碳纤维布加固钢筋混凝土短柱的抗震性能试验研究

Experimental Research on Seismic Behavior of Reinforced Concrete Short Columns Strengthened with Carbon Fiber Sheets

本文对碳纤维布加固的钢筋混凝土短柱的抗震性能进行了试验研究。探讨了轴压比、碳纤维布用量、配箍率和加载顺序等对碳纤维布加固的钢筋混凝土短柱的破坏机理、受力性能及抗震性能的影响。试验结果表明,碳纤维布加固的钢筋混凝土短柱具有很好的延性,能有效提高钢筋混凝土短柱的抗震性能;先施加轴力后进行碳纤维布加固的加载顺序,会降低碳纤维布对柱的约束作用,一定程度上影响对柱的抗剪能力的提高。在此基础上,提出了碳纤维布加固钢筋混凝土短柱的受剪承载力计算公式,可供工程设计和进一步研究参考。

In this paper, the experimental research on seismic behavior of reinforced concrete (RC) short columns strengthened with carbon fiber sheets (CFS) has been performed. The influences of different axial compression ratios, amounts of CFS, stirrup ratios, and loading sequences on failure mechanism, the bearing capacity and seismic behavior of RC short columns have been investigated. The test results indicate that the RC short columns strengthened with CFS have superior ductility so as to increase the seismic behavior of RC short columns effectively, and the loading sequence of exerting axial load at first and then strengthening with CFS will decrease the constraint of CFS on columns so it will affect the increasing effect of CFS on the shear capacity of short columns. Based on the test results, the calculating formulas of the shear capacity of RC short columns strengthened with CFS are proposed, which may be useful for engineering design and further study.