东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (4): 594-598.DOI: 10.12068/j.issn.1005-3026.2018.04.028

• 资源与土木工程 • 上一篇    下一篇

预应力CFRP与钢板复合加固T梁抗弯性能试验

朱广山1,2， 朱浮声1， 盛国华3   

  1. (1. 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 2. 沈阳建筑大学 交通工程学院， 辽宁 沈阳110168; 3. 沈阳工业大学 建筑与土木工程学院， 辽宁 沈阳110870)
  • 收稿日期:2017-01-08 修回日期:2017-01-08 出版日期:2018-04-15 发布日期:2018-04-10
  • 通讯作者: 朱广山
  • 作者简介:朱广山(1978-)， 男， 辽宁阜新人， 东北大学博士研究生; 朱浮声(1948-)， 男， 黑龙江齐齐哈尔人， 东北大学教授， 博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51171041).辽宁省教育厅基金资助项目(201564060); 辽宁省自然科学基金资助项目(201602602).

Experimental Research on Flexural Behavior of T-Beams Strengthened with Combination of Prestressed CFRP and Steel Plate

ZHU Guang-shan1,2， ZHU Fu-sheng1，SHENG Guo-hua3   

  1. 1.School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China. 2. School of Transportation Engineering， Shenyang Jianzhu University， Shenyang 110168， China. 3. School of Architecture and Civil Engineering， Shenyang University of Technology， Shenyang 110870， China.
  • Received:2017-01-08 Revised:2017-01-08 Online:2018-04-15 Published:2018-04-10
  • Contact: ZHU Guang-shan
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摘要： 通过对10根T梁进行抗弯试验，研究了不同CFRP预应力程度、CFRP加固层数及预裂程度对CFRP与钢板复合加固T梁的荷载、跨中挠度及延性系数的影响规律.结果表明:复合加固T梁的极限荷载P○u高于对比梁的90%以上.预应力程度对极限跨中挠度f○max及延性系数μ影响明显，预应力每提高5%，f○max降低约25%.屈服荷载P○y与极限荷载P○u随加固层数的增加线性增大，随预裂程度的增加线性减小.3层比1层CFRP梁的P○u提高了52.8%.预裂程度为60%时，f○max降低约10%.

关键词: 钢筋混凝土T梁, 预应力CFRP, 钢板, 复合加固, 抗弯性能

Abstract: Through the experiments on the flexural behaviors of 10 pieces of T-beams， the influence of different prestress degrees， numbers of strengthening layers of CFRP as well as the pre-splitting degree on the load， midspan deflection and ductility factor of T-beams strengthened by the combination of CFRP and steel plate were studied. The results showed that the ultimate load P○u of the strengthened T-beam is over 90% higher than that of the comparison beam. The impact of prestress degree on the ultimate midspan deflection f○max and the ductility factor μ is obvious in such a way that the f○max reduces about 25% when the prestressing force increases 5%. The yield load P○y and the ultimate load P○u increase linearly with the increase of the strengthening layers， and decrease linearly with the increase of the pre-splitting degree. The P○u of the T-beam strengthened by three-layer CFRP increases 52.8% than that strengthened by one-layer CFRP. When the pre-splitting degree is 60%， the f○max reduces about 10%.

Key words: reinforced concrete T beam, prestressed CFRP, steel plate, combination strengthening, flexural behavior

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