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Theoretical Study and Application of the Reinforcement of Prestressed Concrete Cylinder Pipes with External Prestressed Steel Strands
- Source :
- Applied Sciences, Volume 9, Issue 24
- Publication Year :
- 2019
- Publisher :
- MDPI AG, 2019.
-
Abstract
- Prestressed concrete cylinder pipes (PCCPs) can suffer from prestress loss caused by wire-breakage, leading to a reduction in load-carrying capacity or a rupture accident. Reinforcement of PCCPs with external prestressed steel strands is an effective way to enhance a deteriorating pipe&rsquo<br />s ability to withstand the design load. One of the principal advantages of this reinforcement is that there is no need to drain the pipeline. A theoretical derivation is performed, and this tentative design method could be used to determine the area of prestressed steel strands and the corresponding center spacing in terms of prestress loss. The prestress losses of strands are refined and the normal stress between the strands and the pipe wall are assumed to be distributed as a trigonometric function instead of uniformly. This derivation configures the prestress of steel strands to meet the requirements of ultimate limit states, serviceability limit states, and quasi-permanent limit states, considering the tensile strength of the concrete core and the mortar coating, respectively. This theory was applied to the reinforcement design of a PCCP with broken wires (with a diameter of 2000 mm), and a prototype test is carried out to verify the effect of the reinforcement. The load-carrying capacity of the deteriorating PCCPs after reinforcement reached that of the original design level. The research presented in this paper could provide technical recommendations for the application of the reinforcement of PCCPs with external prestressed steel strands.
- Subjects :
- Materials science
Serviceability (structure)
wire-breakage
020101 civil engineering
02 engineering and technology
Design load
prestressed concrete cylinder pipe
0201 civil engineering
Cylinder (engine)
law.invention
Prestressed concrete
law
Ultimate tensile strength
General Materials Science
Reinforcement
Instrumentation
Fluid Flow and Transfer Processes
business.industry
Process Chemistry and Technology
external prestressed steel strands
General Engineering
Structural engineering
theoretical study
021001 nanoscience & nanotechnology
Computer Science Applications
Mortar
0210 nano-technology
business
Reduction (mathematics)
Subjects
Details
- ISSN :
- 20763417
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Applied Sciences
- Accession number :
- edsair.doi.dedup.....6939e3b8f40494fc88c64d34bbfbd2fa