| 预制预应力空心板的碳纤维加固技术:试验研究和分析 |
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| 作者姓名： | F. Elgabbas A. A. El-Ghandour A. A. Abdelrahman A. S. El-Dieb |
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| 摘 要： | 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。
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| 关 键 词： | 预制预应力空心板 碳纤维片材 嵌入式 外贴式 横向锚固 加固效率 |
Different CFRP Strengthening Techniques for Prestressed Hollow Core Concrete Slabs:Experimental Study and Analytical Investigation |
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| F. Elgabbas,A. A. El-Ghandour,A. A. Abdelrahman,A. S. El-Dieb.Different CFRP Strengthening Techniques for Prestressed Hollow Core Concrete Slabs:Experimental Study and Analytical Investigation[J].Steel Construction,2010(2). |
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| Authors: | FElgabbas AAEl-Gh our AAAbdelrahman ASEl-Dieb |
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| Abstract: | This study presents an experimental-analytical investigation on the structural behavior of precast prestressed hollow core RC slabs strengthened in flexure by CFRP laminates.Externally bonded and near surface mounted(NSM) laminates were used.The CFRP area and using transverse anchorage were also investigated.Results demonstrated that NSM technique resulted in optimum strengthening efficiency.The increased bond strength also resulted in full activation of the NSM laminates at failure.However,the NSM flexural... |
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