Mechanical Behavior of CFRPsteel Composite Tube Confined Steel High Strength Reinforced Concrete Stub Columns Under Axial Compression(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2017年02期
- Page:
- 48-55
- Research Field:
- Publishing date:
Info
- Title:
- Mechanical Behavior of CFRPsteel Composite Tube Confined Steel High Strength Reinforced Concrete Stub Columns Under Axial Compression
- Author(s):
- WANG Ji-zhong; LIU Jian-wei; YANG Liu
- Institute of Structural Engineering, Dalian University of Technology
- Keywords:
- CFRP-steel composite tube; bearing capacity; axial compression; high strength reinforced concrete; stub column
- PACS:
- -
- DOI:
- -
- Abstract:
- The axial compression tests of 8 carbon fiber reinforced polymer (CFRP)-circular/square steel composite tube confined steel high strength reinforced concrete (C-C/STCSRC) stub columns and 4 CFRP confined circular steel tube steel high strength reinforced concrete (C-CTSRC) stub columns were carried out. The effects of constraint coefficient of CFRP, section form of steel tube and mechanical performance of steel tube on the mechanical behavior of C-C/STCSRC columns were investigated. The results show that the ultimate bearing loading capacity of CFRP circular steel composite tube confined steel high strength concrete (C-CTCSRC) stub columns increases with constraint coefficient as exponential form. The ultimate bearing capacity of C-CTCSRC is 50% larger than that of CFRP square steel composite tube confined steel high strength reinforced concrete when the section areas of column core concretes are same. The elastic modulus of CFRP confined circular steel tube steel high strength reinforced concrete stub columns (C-CTSRC) is higher than that of C-CTCSRC during the elastic stage. The ultimate bearing loading capacity of C-CTCSRC is higher than that of C-CTSRC. The results also indicate that CFRP and steel tube can work together when they are bound well.
Last Update: 2017-03-30