Durability of High Strength Concrete Strengthened with Prestressed CFRP Under Wet-thermal Environments(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2017年01期
- Page:
- 25-31
- Research Field:
- Publishing date:
Info
- Title:
- Durability of High Strength Concrete Strengthened with Prestressed CFRP Under Wet-thermal Environments
- Author(s):
- HONG Lei; MA Teng-long; WANG Su-yan
- State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology
- Keywords:
- CFRP; high strength concrete; durability; wet-thermal environment; prestress; cracking load; ultimate load
- PACS:
- -
- DOI:
- -
- Abstract:
- The failure patterns and bearing performances of high strength concrete specimens strengthened with prestressed carbon fiber reinforced polymer（CFRP）were studied by experiments under wetthermal environment where the humidity was 98% and the temperatures were 20 ℃, 40 ℃, 60 ℃. The influences of different factors including prestressed degree, temperature and environment action time on durability of strengthened specimens were analyzed. The results show that the cracking loads and ultimate loads of specimens strengthened with prestress being 30% of tensile strength for prestressed CFRP decline in varying degrees after being subjected to wet-thermal environments. With rising of the environment temperature, the failure patterns change from bending shear failure to flexural failure. In addition, the overall adverse effects of wetthermal environments on specimens strengthened with prestressed CFRP are greater than those on specimens strengthened without prestressed CFRP, and the adverse effect will be aggravated when prestress rises.
Last Update: 2017-01-19