期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 314, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.125707
关键词
Fatigue test; Carbon fiber reinforced polymer; Corroded steel plate; Strengthening
资金
- National Natural Science Foundation of China [52008331, 51908455]
- Independent Research and Development Project of State Key Laboratory of Green Building in Western China [LSZZ202114]
- Key Scientific Research Projects of Shaanxi Provincial Department of Education [21JS030]
The experimental study demonstrated that externally patching CFRP plates significantly strengthened the fatigue behavior of corroded steel plates. Different strengthening configurations had diverse effects on fatigue life extension and crack growth retardation, with end anchorage measures delaying CFRP bonding interface failure and increasing CFRP strengthening stiffness or adopting prestressed CFRP plates reducing crack growth rate effectively.
This paper presents an experimental study performed to investigate the effectiveness of carbon fiber reinforced polymer (CFRP) plates in extending fatigue life of corroded steel plates. Specimens with five kinds of corrosion damage level, four kinds of strengthening configuration and four kinds of applied fatigue stress amplitude were tested and the primary fatigue behavior indications consist of failure mode, fatigue fractography, fatigue life and crack propagation were analyzed. Results showed that externally patching CFRP plates significantly strengthened the fatigue behavior of corroded steel plates, and even made the fatigue life of corroded steel plates recovered or exceeded that of the un-corroded ones, the fatigue life of the patched specimen which presented the most significant strengthening effectiveness even showed a fatigue life extension of more than 85.3 times with respect to the un-patched corroded steel plate and approximately 2 times over the un-corroded steel plate. Results also indicated that different strengthening configurations appeared to have diversity effect on the fatigue life extension and crack growth retardation of corroded steel plates, end anchorage measures effectively delayed the failure process of CFRP bonding interface and improved the fatigue strengthening effect, increasing CFRP strengthening stiffness or adopting prestressed CFRP plates significantly reduced the crack growth rate and extended the fatigue life of corroded steel plates. The outcome of the tests provided meaningful references and essential data for the reliable application of CFRP strengthening system in the fatigue performance improvement of corroded steel structures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据