Analysis of Anticracking Ability of Loaded Reinforced Concrete Beam Strengthened with Prestressed CFRP Sheet(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2014年03期
- Page:
- 38-44
- Research Field:
- Publishing date:
Info
- Title:
- Analysis of Anticracking Ability of Loaded Reinforced Concrete Beam Strengthened with Prestressed CFRP Sheet
- Author(s):
- CHENG Dong-hui; ZHANG Shu; YE Xu; YU Yong-zhi
- School of Civil Engineering, Northeast Forestry University
- Keywords:
- prestressed CFRP sheet; reinforcement ratio; loaded reinforced concrete beam; anticracking ability; crack width
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to study the effect of reinforced concrete flexural members with prestressed carbon fiber reinforced polymer (CFRP) sheet on crosssection cracks, two groups of eight test beams with different reinforcement ratios were designed. Based on bearing 40% ultimate load, the crosssection test beams were strengthened with prestressed CFRP sheet, and the static load test was completed to obtain test data of bending crack distribution, crack width and height of concrete flexural members in the early stage of loading and being strengthened after second loading. Based on the test data, through theoretical analysis, calculation formulae of average crack spacing and maximum crack width of concrete beam strengthened with prestressed CFRP sheet were put forward, which coordinated with Code for Design of Concrete Structures. The study results show that in the process of second loading, prestressed CFRP sheet can effectively suppress the development of crack, and with increasing of the prestressed tensile stress, the average crack spacing and crack width decrease.
Last Update: 2014-09-30