碳纤维加固受损混凝土框架节点的试验研究

发布时间：2018-01-19 22:28

本文关键词： 混凝土框架节点碳纤维加固抗震性能轴压比　出处：《华中科技大学学报(自然科学版)》2016年12期 　论文类型：期刊论文

【摘要】：采用低周反复加载试验方法对采用碳纤维加固的受损混凝土框架节点进行试验研究,详细介绍了未加固、直接采用碳纤维加固和受损后采用碳纤维布加固情况下强柱弱梁和强梁弱柱型框架节点的破坏过程.结果表明:节点受损前采用碳纤维布加固的效果比节点受损后再加固的效果好;节点受损后经碳纤维加固,其抗剪承载能力和抗变形能力均有所提高,但对抗变形能力的提高更显著;碳纤维加固使得强梁弱柱型节点的破坏模式从脆性破坏转变为延性破坏;碳纤维布对框架节点进行加固可有效改善节点的捏缩现象,提高其耗能能力;框架节点试件受损加固后随着轴压比增大,节点的耗能能力提高的程度却在不断降低.
[Abstract]:The low cycle repeated loading test method is used to test the damaged concrete frame joints strengthened with carbon fiber, and the unstrengthened joints are introduced in detail. The failure process of the strong column weak beam and the strong beam weak column frame joint strengthened with carbon fiber reinforced directly and damaged by carbon fiber sheet is obtained. Before the joint is damaged, the effect of strengthening with carbon fiber sheet is better than that after the joint is damaged. After the joint is damaged by carbon fiber, the shear bearing capacity and deformation resistance are improved, but the resistance to deformation is more obvious. The failure mode of strong beam and weak column joints is changed from brittle failure to ductile failure due to carbon fiber reinforcement. The reinforcement of frame joints with carbon fiber sheets can effectively improve the pinch phenomenon of the joints and improve their energy dissipation capacity. With the increase of axial compression ratio, the energy dissipation capacity of frame joints decreases continuously after the specimens are damaged and strengthened.
【作者单位】：武汉理工大学土木工程与建筑学院;
【基金】：国家自然科学基金资助项目(51678464)
【分类号】：TU375.4
【正文快照】： 地震作为一种自然灾害,常常造成严重的人员伤亡、财产损失和建筑损毁.我国是一个地震灾害十分严重的国家,新出版的“中国地震动参数区划图”(GB18306-2015)取消了抗震不设防地区[1],自2016年6月1日起,我国国土面积内的地区均为地震设防区域,地震动参数明确到乡镇一级.1976年的

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