摘要
为了改善嵌入式预应力纤维布(FRP)加固技术的不足之处,利用粘结与机械锚固共同工作的原理,在预应力FRP张拉粘贴完毕后,对张拉端进行二次锚固,粘结层硬化后拆除原有锚夹具。为保证锚固端的可靠性,本文对锚固端粘结层的性能进行了理论分析,并对混合锚固端进行了试验研究。研究结果表明:通过改变粘结层的性能,可大幅度提高粘结层的锚固能力;钢板压条可提供挤压力,改善和提高了粘结层的受力性能,便于保证锚固端施工质量,可靠性好。采用粘结层与钢板压条混合锚固的方式可为预应力FRP提供足够的锚固力,改善了施工工艺,明显降低加固成本,促进了预应力FRP加固技术在实际工程中的应用。
In order to improve the deficiency in the technology of embedded prestressed FRP reinforcement,with the principle of anchoring bond and additional mechanical anchoring working together,the tensioning end of prestressed FRP is anchored twice after the tension and bonding of the FRP,then removing the existing fixture and anchor.To ensure the reliability of anchoring,the paper makes a theoretical analysis of the performance of the bonding layer in the anchoring end and an experimental research on hybrid anchoring end.The research results show that the change of the performance in the bonding layer improves its anchoring ability significantly,and the steel plate can be squeezed to provide pressure to improve and enhance the performance of the bonding layer,which guarantee the quality of anchoring end.The method of combining bonding layer with hybrid anchorage of the steel plate can provide the adequate anchoring capacity,improve the construction techniques,lessen the cost and the boost the application of prestress FRP reinforcement in the practical constructions.
出处
《建筑科学》
北大核心
2011年第5期28-31,共4页
Building Science
基金
浙江省交通厅科技计划项目2008H01
关键词
预应力FRP
加固
混合锚固
试验研究
prestressed FRP
reinforcement
hybrid anchorage
testing study
