【摘要】 对3根不同足尺碳纤维片材的加固混凝土柱在水平低周反复荷载作用下进行了试验研究。对比分析了试验柱的抗剪承载力、柱顶位移、延性、滞回曲线、骨架曲线等抗震性能。结果表明:采用碳纤维环绕包裹粘贴加固柱对混凝土柱的抗剪承载力提高较明显,柱的初始刚度增加,柱的变形能力和延性明显提高,钢筋混凝土柱消耗地震能量的能力增强,使柱的抗震性能得到显著改善;二层包裹与一层包裹碳纤维片材对比分析表明,这2种方法对结构影响区别不大,原因在于柱包裹碳纤维提高结构抗震性能主要是套箍作用增加了混凝土柱的约束,且增加层数对增加约束的效应有限。更多还原

【Abstract】 Three reinforced concrete columns strengthened with carbon fiber sheets under cyclic loading were tested.Analyses were made from the seismic shear capacity,displacement of column top,ductility,hysteretic curve,skeleton curve etc of the seismic behaviors of the specimens columns.The research indicates that concrete columns strengthened with enwrap carbon fiber sheets,improved the seismic shear capacity quite evidence.Because of the increase in the initial stiffness,it can improve the deformation capacity and increase the ductility of the columns obviously,and increase seismic energy dissipation.The seismic behaviors of the reinforced concrete columns improved evidently.Contrast analysis between two layer and one layer enwrap carbon fiber sheets indicate,that two methods have little influence on the structure.The reason is strengthened with enwrap carbon fiber sheets increase the seismic behaviors of the concrete columns is the hooping effect enhance the restrain,add the layer number to increase the restraint effect is finite.更多还原