【摘要】 为研究预应力钢带加固钢筋混凝土短柱的抗震性能,对6个预应力钢带加固钢筋混凝土短柱试件和3个对比试件进行低周反复荷载试验。结合试验研究结果,分析预应力钢带加固柱的破坏形态、滞回曲线、位移延性系数、骨架曲线、耗能性能和刚度退化;研究轴压比、剪跨比、钢带间距对加固试件抗震性能的影响。试验结果表明,采用预应力钢带加固钢筋混凝土短柱可以明显改善其延性、变形能力和耗能性能,并且能显著提高短柱的抗剪承载力,抗震性能得到显著提高和改善。更多还原

【Abstract】 In order to investigate the seismic performance of reinforced concrete short column retrofitted by prestressed steel strip( abbreviated to PSRC column),low-cyclic reversed loading tests of six PSRC column specimens and three comparison specimens were conducted,in which the columns were vertically loaded and horizontally cycle-loaded.During the tests,the final failure patterns,hysteresis curves,displacement ductility coefficient,skeleton curves,energy consumption values and stiffness degradation of these PSRC column specimens were fully analyzed. And the influences of the key parameters such as axial compression ratio,shear span ratio and steel strip space on the seismic behavior of the strengthened specimens were studied. From the experimental results,it was shown that the ductility,shear carrying capacity,and energy dissipation were improved obviously,and it was verified that seismic performance of PSRC column had been successfully improved by the prestressed steel strips,this new retrofitted method was effective and reliability.更多还原