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通过对预应力FRP放张后端部应力状态的分析后发现，适当加大粘结层的厚度和提高 粘结层的变形性能可大幅度提高端部粘结锚固的能力，满足预应力加固的需要. 附加 的简易锚固措施可进一步提高锚固能力和可靠性. 分析为预应力FRP加固技术的成本降低 和施工工艺简化提供理论依据.

THE ANALYSIS OF END STRESS OF PRESTRESSED FRP WITHOUT ANCHORAGE$

If there is usually no anchor measure in the end, the prestressed level provided by the usage of prestressed FRP reinforcement is limited and does not reach the desired results. While relying entirely on the permanent mechanical anchorage, the high cost of anchoring fixture is not beneficial to the widespread application of prestressed FRP reinforcement technology. Through the analysis of stress state of the end after release of prestressed FRP, it is found that the appropriate increase of the thickness of cohesive layer and the improvement of its deformation performance can increase substantially the end bonding ability to satisfy the needs of prestressed reinforcement. The additional simple anchorage measures can further improve the capacity and reliability of anchorage. This analysis provides a theoretical basis for the prestressed FRP reinforcement technology to reduce the cost and to simplify the construction process.