摘要
通过对17根跨中留有预切缝的试验梁进行破坏性加载试验,研究了FRP-螺栓联合加固技术的粘结性能、锚固间距和合理锚固长度。结果表明,HB-FRP(FRP-锚钉联合加固技术)体系较EB-FRP(外贴FRP加固法)体系的延性、承载力、FRP的剥离应力等都有较大的提高。在试验数据及理论分析的基础上,提出了HB-FRP和EB-FRP中部裂缝引起的剥离强度计算公式以及较为合理的锚固间距估算公式,计算结果与试验结果吻合较好。所得结果可为联合加固的进一步研究及工程上的应用提供一定的依据。
In order to study the bond behavior,anchorage space and reasonable anchorage length of hybrid-bonding of FRP,the destructive tests of 17 experiment beams which with mid-span pre-cutting fissures have been done.Compared with EB-FRP system,it is found that HB-FRP system is improved a lot in ductility,bearing capacity,FRP＇s peeling stress and so on.The formulas for calculating HB-FRP and EB-FRP＇s induced peeling strength by middle crack and a more reasonable estimation formula for anchorage space are presented based on the experimental data and theoretical analysis.Calculating results are coincided with experimental results,which can serve as a reference for further researches and engineering applications.
出处
《土木建筑与环境工程》
CSCD
北大核心
2010年第6期7-13,共7页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金重点项目(50539080
50727904)
973计划项目(2010CB732002
2007CB209407)
高等学校博士学科点专项科研基金(20100131120042)
