摘要
本试验采用5根钢筋混凝土梁,其中1根对比梁加载至破坏,其余4根梁加载至最大裂缝宽度达到0.2mm^0.3mm后卸载采用碳纤维布进行加固且用U形箍锚固,然后进行抗弯试验。试验结果表明,采用U形箍锚固措施对损伤钢筋混凝土梁极限承载力有不同程度的影响。在试验研究和理论分析基础上对碳纤维布加固损伤钢筋混凝土梁抗弯承载力计算方法进行了分析,给出了损伤混凝土梁抗弯承载力折减系数;并对加固损伤钢筋混凝土梁挠度进行分析。计算结果表明,理论计算结果与试验值吻合较好。
In this test 5 RC beams are applied,1 control RC beam is loaded to destroy,and the remaining 4 RC beams are loaded to the maximum crack widths in 0. 2mm ～ 0. 3mm after unloading strengthened with CFRP and anchoraged with U-shaped hoop bending resistance experiment. The experimental results show that CFRP U-shaped hoop anchor measures have varying degrees of influence on the ultimate bearing capacity of damaged RC beam. On the basis of experimental research and theoretical analysis of damaged RC beams strengthened with CFRP flexural bearing capacity calculation method,the reduction factor of bearing capacity of damaged RC beams is given; the damage of reinforced concrete beam deflection is analyzed and the calculation results show that the theoretical calculation result has good agreement with the test results.
出处
《工程抗震与加固改造》
北大核心
2016年第4期114-120,86,共8页
Earthquake Resistant Engineering and Retrofitting
基金
辽东学院青年基金项目(2015QN031)
