Mechanical Performances of Prestressed Concrete Beams with Large-diameter High-strength Steel Strands(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2017年02期
- Page:
- 103-110
- Research Field:
- Publishing date:
Info
- Title:
- Mechanical Performances of Prestressed Concrete Beams with Large-diameter High-strength Steel Strands
- Author(s):
- WANG Jun; LI Ting; REN Jing-hao
- School of Civil Engineering, Northeast Forestry University
- Keywords:
- larger-diameter high-strength steel strand; prestressed concrete beam; ultimate bearing capacity; crack width; stiffness
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to explore the mechanical performance of prestressed concrete beam with large-diameter high-strength steel strand, the stress performance tests of six post-tensioning prestressed concrete beams under vertical loads were conducted. The prestressed concrete beams were made of 1860 grade steel strand with 17.8 mm diameter as prestressed reinforcement and HRB400 grade steel bars as non-prestressed tendons. The test data about pre-stressed concrete beam, such as the stress of steel strand and non-pre-stressed reinforcement, concrete strain, maximum crack width in short term, midspan deflection and so forth were analyzed. The results show that the work performance of prestressed concrete beam with largediameter highstrength steel strands as prestressed reinforcement is well. The flexural failure form and flexural mode of prestressed concrete beam with largediameter highstrength steel strand is almost same with ordinary prestressed concrete beam. The midspan control section of test beam meets the plane crosssection assumption, and the ultimate bearing capacity can be calculated according to the specification of normal section bending theory. The calculated crack width and deflection of test beam according to current specification agree well with the measured value.
Last Update: 2017-03-30