摘要
采用进口TYFO和国产GFRP2种高强复合玻璃纤维布,人为设置缺陷,控制有效粘结面积,进行弯拉粘结性能试验,研究探讨了有效粘结面积对高强复合玻璃纤维布加固混凝土小梁粘结性能的影响。纤维增强复合材料加固混凝土的规范中规定:"纤维布材料与原有结构物的粘结必须密实。有效粘结面积不得低于95%"。但现实操作中,即使在实验室做纤维布加固试验,由于混凝土本身的不密实,实际粘贴面积很难控制在95%以内。而有效粘结面积低于95%对加固效果的影响规范并未提供详细的参考数据,本文作者建议当粘结缺陷超过95%时,可用式(1)计算加固后的极限载荷。
Criterions of strengthening concrete with fiber reinforced polymer prescribe that the bond between it and concrete must be close-grained and the effective bond area must not be lower than 95%.But in practice,it is difficult to make the actual ineffective bond area less than 5% even in the laboratory because concrete is not absolutely dense.Consulting data for the influence of the ineffective bond area less than 5% are not provided by criterions.So we adopt two advanced composite glass fiber sheets：America TYFO and homemade GFRP and manually set up lacunas to control the effective bond area.The influence of the effective bond area on the bond performance between advanced composite glass fiber sheets and concrete is studied through the flexural experiment.The calculating expressions of reinforced capacity are proposed when the effective bond area is less than 95%.
出处
《新技术新工艺》
2010年第11期83-85,共3页
New Technology & New Process
基金
江苏省建设系统科技计划资助项目(JSJH1018)
