预应力纤维布混合锚固分析与试验研究

• 作 者: 李青松 孟少平 单岗 王侠伟
• 机 构: 东南大学混凝土及预应力混凝土结构教育部重点实验室,浙江顺畅高等级公路养护有限公司,
• 出 处: 建筑科学
• 发表日期: 2011年05期
• 关键词: 预应力FRP 加固 混合锚固 试验研究

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 inadequacies of the FRP reinforcement technology, the principle of cohesion and mechanical anchoring are used together. After the prestressed FRP is tensioned and pasted, the tension end is re-anchored and bonded After the layer is hardened, remove the original anchor fixture. In order to ensure the reliability of the anchorage end, the paper analyzes the performance of anchorage end bond layer and tests the hybrid anchorage end. The results show that the anchoring ability of the adhesive layer can be greatly improved by changing the properties of the adhesive layer. The extrusion of the adhesive layer can provide the compressive force, improve and enhance the mechanical properties of the adhesive layer, and ensure the construction quality of the anchorage end. Good reliability. Adopting the method that the adhesive layer and the steel strip are mixed and anchored can provide sufficient anchoring force for the prestressed FRP, improve the construction technology, obviously reduce the reinforcement cost, and promote the application of the prestressed FRP reinforcement technology in practical engineering.