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对采用碳纤维片材加固的预制预应力空心板进行抗弯性能试验和分析。采用嵌入式和外贴式两种方式加固。对碳纤维片材面积和横向锚固的作用也进行了研究。研究结果表明:当试件破坏时,所增加的粘结强度促使嵌入式板材充分发挥作用,因此,嵌入式加固技术具有较高的加固效率。然而,嵌入式加固设计还应谨慎对待以免产生不利的剪-拉破坏模式;外贴式加固技术由于过早的剥离破坏而具有中等的加固效率,然而这种效率可以通过横向碳纤维锚固来优化,横向锚固使得剥离远离板端,且延迟了剥离破坏,其变形比对比板的更小。对试验进行了合理的分析,试验和分析结果具有很高的一致性。
Prefabricated prestressed hollow slabs reinforced with carbon fiber sheets were tested and analyzed for flexural behavior. Reinforced with embedded and external two ways. The role of carbon fiber sheet area and lateral anchorage has also been studied. The results show that: when the specimen is damaged, the increased bonding strength promotes the full play of the embedded plate; therefore, the embedded reinforcement technique has a higher reinforcement efficiency. However, the design of the embedded reinforcement should also be treated with care to avoid adverse shear-pull failure modes; the external reinforcement technique has moderate reinforcement efficiency due to premature peeling failure, but this efficiency can be optimized by lateral carbon fiber anchoring, Lateral anchoring makes the stripping away from the plate end, and delays the delamination failure, which is less deformed than the comparative plate. Reasonable analysis of the test, test and analysis of the results with a high degree of consistency.