Experiment on Shear Transfer Capacity of Reinforced Concrete Strengthened with CFRP(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2015年06期
- Page:
- 43-49
- Research Field:
- Publishing date:
Info
- Title:
- Experiment on Shear Transfer Capacity of Reinforced Concrete Strengthened with CFRP
- Author(s):
- LIN Feng; LI Yan-xiang; DONG Yu
- Department of Structural Engineering, Tongji University
- Keywords:
- CFRP; reinforced concrete; shear transfer; strengthening; ultimate bearing capacity; component model
- PACS:
- -
- DOI:
- -
- Abstract:
- Total fifteen typical Z-type specimens strengthened with external carbon fiber reinforced polymer (CFRP) strips were tested to investigate their shear transfer capacities. Test parameters included reinforcing steel bar ratios(0.46%-1.2%) and CFRP reinforcement ratios (0%-0.3%). Expressions were proposed to predict the shear transfer capacities of CFRP strengthened concrete. The reinforcement mechanism of shear transfer was analyzed based on component model. The study results show that the shear transfer capacities improve in a range of 6%-50%with the increasing of CFRP reinforcement ratios. Moreover, for a given CFRP reinforcement ratio, the percentage of improvement decreases with the increasing of reinforcing steel bar ratios. The capacity improvement is believed due to the clapping force from CFRP.An approximate strengthening effect is realized when the external CFRP and the internal reinforcements provide identical clapping force in lateral direction. The proposed expressions to predict the shear transfer capacities have good applicability.
Last Update: 2015-11-30