PET纤维布加固锈蚀钢筋混凝土柱抗震性能试验研究

发布时间：2018-01-22 14:50

本文关键词： 钢筋混凝土柱 PET 箍筋锈蚀拟静力试验抗震性能　出处：《建筑结构学报》2015年S2期 　论文类型：期刊论文

【摘要】：采用聚对苯二甲酸乙二醇酯(PET)纤维布对不同箍筋锈蚀程度混凝土方柱进行外包抗震加固。通过对混凝土柱施加水平低周往复荷载,研究了PET纤维布外包损伤钢筋混凝土柱的破坏形态、滞回曲线、刚度退化、骨架曲线及耗能性能,并同一个未损伤柱和一个未损伤加固柱的试验结果进行对比,分析了不同箍筋锈蚀程度、外包PET纤维布体积率对混凝土柱抗震性能的影响。试验结果表明:钢筋混凝土柱在低周反复荷载作用下的破坏模式为脆性剪切破坏,但随着外包PET体积配筋率的增大由脆性剪切破坏变为弯曲-剪切破坏;随着钢筋锈蚀率的增加,损伤柱的受剪承载力、耗能性能及刚度降低;损伤钢筋混凝土柱在经过PET纤维布加固后,试验柱的承载力、刚度退化及抗震耗能性能均得到了显著提高。
[Abstract]:Using polyethylene terephthalate (PET) fiber cloth of different stirrup corrosion degree of concrete square columns were reinforced. Outsourcing through a horizontal low cyclic loading of concrete columns, failure modes of PET fiber reinforced concrete column damage outsourcing research, hysteretic curve, skeleton curve and stiffness degradation, energy dissipation. And with a uninjuried column and a test undamaged reinforced column results were compared, analysis of different degree of stirrups, outsourcing PET fiber cloth volume ratio influence on the seismic behavior of RC columns. Test results indicate that the failure mode of reinforced concrete columns under low cyclic loading for brittle shear failure, but with the outsourcing of PET volume ratio of reinforcement increases from brittle shear failure to bending shear failure; with the increase of the corrosion rate, the shear bearing capacity of column damage, energy dissipation and stiffness reduction; After reinforcement of damaged reinforced concrete columns through PET fiber cloth, the bearing capacity, stiffness degradation and seismic energy dissipation performance of the test column have been greatly improved.

【作者单位】：浙江大学结构工程研究所;
【基金】：中央高校基本科研业务费专项(2015FZA4018) 交通运输部建设科技项目(2014318494020) 浙江省自然科学基金项目(LY14E080013)
【分类号】：TU375.3;TU352.11
【正文快照】： 0引言目前,关于结构抗震加固方法主要有加大截面法、钢构套法、预应力法及外包纤维增强塑料法等。国内外学者对不同抗震加固方法的效果进行了研究。张轲等[1]对8根碳纤维布加固混凝土柱进行了反复荷载作用下抗震性能的试验研究。结果表明,采用碳纤维布加固可以提高柱的变形能

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