Structural performance of buried prestressed concrete cylinder pipes with harnessed joints interaction using numerical modeling |
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| Affiliation: | 1. Pure Technologies, 3420 State Route 22 West, Suite 130, Branchburg, NJ 08876, USA;2. Lebanese American University, Department of Civil Engineering, 211 E 46th St., New York, NY 10017, USA;1. Materials & Structural Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, China;2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China;3. College of Mechanics and Materials, Hohai University, Nanjing, China;1. School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China;2. College of Water Conservancy & Environmental Engineering, Zhengzhou University, Zhengzhou 450001, China;3. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;4. National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology, Zhengzhou 450001, China;5. Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety, Henan Province, Zhengzhou 450001, China;1. Civil Engineering Department, Faculty of Engineering, Girne American University, Girne, N. Cyprus Via Mersin 10, Turkey;2. Civil Engineering Department, Faculty of Engineering, Middle East Technical University, Ankara, Turkey;3. Civil Engineering Department, Malekan Branch, Islamic Azad University, Malekan, Iran;1. School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China;2. National Engineering Laboratory of Optical Fiber Sensors, Wuhan University of Technology, Wuhan 430070, Hubei, China;3. Beijing Institute of Water, Beijing 100048, China |
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| Abstract: | Broken prestressing wire wraps are the main cause of failure in buried prestressed concrete cylinder pipes (PCCP), which form the backbone of water and wastewater infrastructure networks in North America. Advanced numerical modeling using non-linear finite elements is used to model the effect of the number and location of broken wire wraps on the structural performance of Class 125-14, 96-in. PCCP. The modeling technique used is unique in that it considers full interaction between adjacent pipes with harnessed joints, as well as combined internal and external loading with full soil–pipe interaction. Performance indicators in the various components of PCCP are monitored as internal pressure is increased. A sensitivity analysis is presented for how manipulating the severity of the damage affects the failure pressure of the pipe. The results show that the internal fluid pressure required to cause failure can be as much as 34% lower when the damage is at the barrel of the pipe, and that the internal pressure that causes yielding of the wire wraps decreases by 66% as the damage worsens from 5 to 100 wire breaks. |
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| Keywords: | Buried concrete pipes Pipe joints Prestressed concrete cylinder pipes Numerical modeling Earth pressure Finite element analysis |
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