[1]王新定,戴航,丁汉山,等.体外预应力CFRP筋混凝土梁正截面抗弯试验研究[J].东南大学学报(自然科学版),2009,39(3):557-562.[doi:10.3969/j.issn.1001-0505.2009.03.026]
 Wang Xinding,Dai Hang,Ding Hanshan,et al.Experimental study on flexural behaviour of concrete beams prestressed with external CFRP tendons[J].Journal of Southeast University (Natural Science Edition),2009,39(3):557-562.[doi:10.3969/j.issn.1001-0505.2009.03.026]
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体外预应力CFRP筋混凝土梁正截面抗弯试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第3期
页码:
557-562
栏目:
材料科学与工程
出版日期:
2009-05-20

文章信息/Info

Title:
Experimental study on flexural behaviour of concrete beams prestressed with external CFRP tendons
作者:
王新定1 戴航2 丁汉山2 叶见曙1
1 东南大学交通学院, 南京 210096; 2 东南大学土木学院, 南京 210096
Author(s):
Wang Xinding1 Dai Hang2 Ding Hanshan2 Ye Jianshu1
1 School of Transportation, Southeast University, Nanjing 210096,China
2 School of Civil Engineering, Southeast University, Nanjing 210096,China
关键词:
CFRP筋 体外预应力 抗弯试验 承载力
Keywords:
carbon fiber reinforced polymer tendons external prestressing bending test load carrying capacity
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2009.03.026
摘要:
为研究体外预应力CFRP筋混凝土结构的正截面抗弯特性,研制了CFRP后张预应力筋夹片式锚具,对1片体外CFRP筋直线布置体外预应力混凝土梁和2片体外CFRP筋曲线布置体外预应力混凝土梁进行了正截面抗弯试验研究.试验结果表明:体外预应力CFRP筋混凝土梁受力过程与体外预应力钢筋混凝土梁有较多相似之处; 跨中设一转向块的体外预应力CFRP筋混凝土梁的开裂荷载和极限承载力均比不设转向块的体外预应力CFRP筋混凝土梁要大,而跨中极限挠度则比不设转向块的体外预应力CFRP筋混凝土梁要小.在跨中设置转向块,可有效提高体外预应力CFRP筋混凝土梁的极限抗弯承载能力.按所推导的体外预应力CFRP筋混凝土梁的极限抗弯承载力理论公式,计算值与试验实测值吻合良好.
Abstract:
In order to study the flexural behaviour of concrete structures prestressed with external carbon fiber reinforced polymer(CFRP)tendons, a new wedge-shaped anchor for the CFRP post-tensioning prestressing tendon was developed. The flexural behaviour of a concrete beam prestressed with external CFRP tendons without any deviator and two concrete beams with a single deviator provided at midspan was carried out. The experimental results show that the flexural behaviour of concrete beams prestressed with external CFRP tendons is similar to that with external steel tendons in many aspects; the cracking load and the ultimate load carrying capacity of concrete beams prestressed with external CFRP tendons with a single deviator provided at midspan are higher than those without any deviator, while the ultimate deflection at midspan is lower. The ultimate flexural load carrying capacity of concrete beams prestressed with external CFRP tendons is increased by using a single deviator provided at midspan. Theoretical calculations based on the proposed formula are in good agreement with the experimental results with regard to the ultimate flexural load carrying capacity of concrete beams prestressed with external CFRP tendons.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 王新定(1966—),男,博士,副教授,xdwang66@163.com.
引文格式: 王新定,戴航,丁汉山,等.体外预应力CFRP筋混凝土梁正截面抗弯试验研究[J].东南大学学报:自然科学版,2009,39(3):557-562. [doi:10.3969/j.issn.1001-0505.2009.03.026]
更新日期/Last Update: 2009-05-20