ZHAI Ke-jie,FANG Hong-yuan,ZHANG Chong-bo,et al.Mechanical Properties and Failure Mode Simulation Analysis of Joints in PCCP[J].China Water & Wastewater,2020,36(20 20):10-18.
Mechanical Properties and Failure Mode Simulation Analysis of Joints in PCCP
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
20 20
Page:
10-18
Column:
Date of publication:
2020-10-17
- Keywords:
- prestressed concrete cylinder pipe (PCCP); joint; relative angle; mechanical response; failure analysis
- Abstract:
- The joint of prestressed concrete cylinder pipe (PCCP) is the most vulnerable location. In order to study the mechanical response and failure mode of the joint when the relative angle occurs, a refined three-dimensional model of the PCCP joint was established based on nonlinear finite element method. Combining the stress distribution of each material at the joint and the slip-out failure analysis of the rubber, the effects of the relative angle, joint gap, and the fit clearance on the joint were studied. The results showed that when the relative angle reached 1.434°, the joint would fail due to the rubber slipping out completely, and the concrete at the joint was the most vulnerable to tensile cracking. The slip out of the rubber would increase with the development of fit clearance, but it would help reduce the stress of each material. The increase of the joint gap was not conducive to the protection of the joint. The research results can provide basis for the design, construction and maintenance of PCCP.
Last Update:
2020-10-17