Failure Analysis of PCCP with Broken Wires

Abstract:

The prestressing wires of prestressed concrete cylinder pipe (PCCP) provide pipe wall with compressive stress to resist internal pressure. Broken wires resulting from corrosion is a major factor contributing to the degradation of pipe strength. In order to analysis the failure process of PCCP with broken wires, a 3-D model with a very fine mesh is developed for the pipe structure, considering material nonlinear behavior, pipe-earth interaction, prestress loss, and combined effects of external and internal loads. The results of nonlinear finite element analysis show that wire breaks causing prestress loss can accelerate the failure process of PCCP. As internal pressure increases, the earliest concrete cracking and steel-cylinder yielding occurs in the prestress loss zone. The closer to the prestress loss zone, the higher stress unbroken wires will have.

• Periodical: Applied Mechanics and Materials (Volumes 193-194)
• Pages: 855-858
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.193-194.855
• Online since: August 2012
• Authors: Ri You, Hong Bo Gong
• Keywords: Broken Wires, Failure Analysis, Finite Element Method (FEM), PCCP

References

[1] Mehdi S. Zarghamee, Rasko P. Ojdrovic, and Peter D. Nardini, Prestressed Concrete Cylinder Pipe Condition Assessment–What Works, What Doesn't, What's Next, Proc., Pipelines 2011.

DOI: 10.1061/41187(420)18

[2] Ri You, Longitudinal Cracking Analysis of PCCP with Broken Wires, Proc., ICMAM (2011)

[3] Mehdi S. Zarghamee, Daniel W. Eggers, and Rasko P. Ojdrovic, Finite-Element Modeling of Failure of PCCP with Broken Wires Subjected to Combined Loads, Proc., Pipelines 2002.

DOI: 10.1061/40641(2002)66

[4] Gomez R, Munoz D, Vera R, et al, Structural Model for Stress Evaluation of Prestressed Concrete Pipe of the Cutzamala System. Proc., Pipelines 2004.

DOI: 10.1061/40745(146)26

[5] ANSI/AWWA C301-07: Prestressed Concrete Pressure Pipe, Steel-Cylinder Type. (2007)

DOI: 10.12999/awwa.c301.99