[1]张娟秀,叶见曙,姚伟发.冻融循环作用下CFRP加固混凝土梁疲劳性能试验研究[J].东南大学学报(自然科学版),2010,40(5):1034-1038.[doi:10.3969/j.issn.1001-0505.2010.05.029]
 Zhang Juanxiu,Ye Jianshu,Yao Weifa.Fatigue behavior of RC beams strengthened with CFRP sheets after freeze-thaw cycling action[J].Journal of Southeast University (Natural Science Edition),2010,40(5):1034-1038.[doi:10.3969/j.issn.1001-0505.2010.05.029]
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冻融循环作用下CFRP加固混凝土梁疲劳性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第5期
页码:
1034-1038
栏目:
土木工程
出版日期:
2010-09-20

文章信息/Info

Title:
Fatigue behavior of RC beams strengthened with CFRP sheets after freeze-thaw cycling action
作者:
张娟秀 叶见曙 姚伟发
东南大学交通学院,南京 210096
Author(s):
Zhang Juanxiu Ye Jianshu Yao Weifa
School of Transportation, Southeast University,Nanjing 210096, China
关键词:
混凝土梁 CFRP 加固 疲劳试验 冻融
Keywords:
reinforced concrete beams carbon fiber reinforced polymer(CFRP) structure strengthening fatigue test freeze-thaw cycles
分类号:
TU375
DOI:
10.3969/j.issn.1001-0505.2010.05.029
摘要:
为研究冻融循环作用对CFRP加固混凝土梁疲劳性能的影响,以CFRP加固混凝土梁的疲劳试验作为对照,分别进行了CFRP加固受到冻融循环作用的混凝土梁的疲劳试验和CFRP加固梁经冻融循环作用后的疲劳试验.试验结果表明:在正常使用状态下,冻融循环50次作用后,CFRP加固梁的挠度增加了6.2%~14.9%,主筋应变增加了2.14%~11.2%,刚度变化不显著; 在相同疲劳荷载作用下,与未经冻融作用的CFRP加固梁相比,经受冻融循环作用的CFRP加固梁的疲劳寿命降低不到5%; CFRP加固受到冻融损伤的混凝土梁可能发生剥离破坏,因而在工程中,为防止发生剥离破坏应采取有效措施.
Abstract:
In order to study the effects of freeze-thaw cycling action on the fatigue behavior of CFRP-strengthened beams, three CFRP(carbon fiber reinforced polymer)-strengthened beams were tested under fatigue loading. One of the beams was a control beam and it was not subjected to freeze-thaw cycles. The remaining two beams underwent freeze-thaw cycling before or after being strengthened, respectively. The main results obtained from the tests are: in normal service state, the deflection increases 6.2% to 14.9%, and the steel strain increases 2.14% to 11.2%, and the stiffness decreases slightly in CFRP-strengthened beam after 50 freeze-thaw cycles; under the same fatigue loading, a slight drop(less than 5%)in fatigue life is observed in strengthened beam with freeze-thaw cycling action compared with the control beam; the debonding failure mode may occur in the beam subjected to freeze-thaw cycles before being strengthened with CFRP. So in this case some measures should be adopted to avoid debonding failure.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 张娟秀(1973—),女,博士生,讲师; 叶见曙(联系人),男,教授,博士生导师,yejianshu@seu.edu.cn.
基金项目: 西部交通建设科技资助项目(200731822379)、公路旧桥检测与加固技术交通行业重点实验室(北京)资助项目(JQKFKT2008-01).
引文格式: 张娟秀,叶见曙,姚伟发.冻融循环作用下CFRP加固混凝土梁疲劳性能试验研究[J].东南大学学报:自然科学版,2010,40(5):1034-1038. [doi:10.3969/j.issn.1001-0505.2010.05.029]
更新日期/Last Update: 2010-09-20