玻璃钢/复合材料 ›› 2009, Vol. 209 ›› Issue (1): 73-76.

• 产品 工艺 • 上一篇    下一篇

CFRP加固部分预应力梁的抗弯性能分析

  

  1. (华东交通大学土木建筑学院,江西南昌330013)
  • 出版日期:2009-01-28 发布日期:2009-01-25
  • 作者简介:童谷生(1962-),男,教授,博士后,主要从事结构加固方面的研究。
  • 基金资助:

    江西省自然科学基金(0450033)

ANALYSIS ON THE FLEXURAL BEHAVIOR OF PARTIALLYPRESTRESSED
CONCRETE BEAMS REINFORCED WITH CFRP

  • Online:2009-01-28 Published:2009-01-25

摘要:

通过开展碳纤维布(CFRP)加固部分预应力梁的抗弯实验,系统研究了CFRP对部分预应力混凝土梁的加固效应。制作了7根CFRP加固部分预应力梁,其中一根为对比未加固梁,另外六根为CFRP加固梁。试验考虑了初始裂缝宽度和CFRP层数的影响,分析了CFRP对混凝土梁的极限承载力、挠度和破坏形态的影响,体现了CFRP的阻裂增强效应。试验结果表明,粘贴CFRP可有效减小同荷载下的挠度,抑制试件的裂缝发展,提高预应力梁的抗弯承载力。

关键词: CFRP, 部分预应力梁, 初始损伤, 弯曲性能

Abstract:

The flexural experiments of 7 partiallyprestressed beams were conducted, and the ultimate bearing capacity, deflection and failure mode of the beams were analyzed The beams include 1 nonreinforced contrasting sample and 6 reinforced with CFRP ones.The breadth of the initial damage and the number of layer of CFRP were considered.The experimental results showed that the ultimate bearing capacity of the beams with CFRP increased clearly and the crack expanded more slowly than the contrasting beam This explained that CFRP could reinforce the capability of the partiallyprestressed concrete beams

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