Proposed Simplified Changes to ANSI/AWWA C304 Standard for Design of Prestressed Concrete Cylinder Pipe

Roller, John J.; Lotfi, Hamid Reza

doi:10.1061/9780784479360.063

Cited by 2 publications

(5 citation statements)

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“…e nonlinear behavior of materials in PCCPs is considered in standards AWWA C304-14 and SL 702-2015. To solve the nonlinear problem, we propose a new idea of calculating the stress at the three key sections based on the solutions of nonlinear algebraic equation using FEA, standard AWWA C304-14 [2], and the improved equation proposed in [15].…”

Section: Improved Methodmentioning

confidence: 99%

“…e flowchart of the improved calculation method proposed in this paper is also shown as Figure 2. e difference is that when calculating the internal force of each material, the formula is changed to σ � E(ε)ε, where σ is the material stress and E(ε) is the elastic modulus that changes with the material strain ε [15]. We divide the pipe cross section into five layers: the outer concrete layer, steel cylinder layer, inner concrete layer, steel wire layer, and mortar layer.…”

Section: Improved Methodmentioning

confidence: 99%

“…is approach has a disadvantage of regarding all materials as linear elastic. After performing a detailed review of standard C304-14, Roller et al [15] simpli ed some of the overly complex provisions incorporated in the document without any signi cant consequences to the nal overall design and provided alternative or simpli ed provisions for a number of them.…”

Section: Introductionmentioning

confidence: 99%

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Improvement and Implementation of Calculation Method for Prestressed Concrete Cylinder Pipes

Zhang

et al. 2022

Mathematical Problems in Engineering

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Prestressed concrete cylinder pipe (PCCP) is a type of composite pipes frequently used in water diversion projects. However, the existing methods for structural analysis of such pipes are complex; thus, very few standards are available for use in practical design. In this paper, the new straightforward technique for analyzing PCCP based on available standards is proposed in order to address the shortcomings of the existing standard and improve the convergence of subsequent calculations. The verification and comparison of case study given in the main standards showed that the proposed method is rational and useful. In addition, an advanced finite element model was utilized in practical design case that considered proper constitutive relationships, contact model, prestress of wires, and practical aspects of manufacturing, installation, and operation. Meantime, the results obtained by nonlinear FEA and the improved method are assessed and compared, which showed that nonlinear FEA based on corresponding intrinsic model and the improved method are recommendable to aid in practical design projects.

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Section: Improved Methodmentioning

confidence: 99%

Section: Improved Methodmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improvement and Implementation of Calculation Method for Prestressed Concrete Cylinder Pipes

Zhang

et al. 2022

Mathematical Problems in Engineering

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“…Therefore, the final prestress σ fc of the concrete core is separately calculated using Formulas (10) and (11) for CECS 140 and AWWA C304.…”

Section: Prestressmentioning

confidence: 99%

“…The problem of the excessive use of materials can be solved by introducing three limit states of the PCCPs at serviceability, elasticity, and strength [10]. The drawback is that without relying on proprietary design software UDP, the AWWA C304 is difficult to understand and follow by the designers [11].…”

Section: Introductionmentioning

confidence: 99%

A Simplified Limit-State Design and Verification for Prestressed Concrete Cylinder Pipes under Internal Water Pressure

Shang,

Qu,

Wang

et al. 2023

Buildings

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Ignoring the effect of a concrete core on bearing performance, the current design of prestressed concrete cylinder pipes (PCCPs) under internal water pressure only focuses on the fracture of prestressed steel wire, while the complexity of the AWWA C304 design method leads to a strong dependence on software that cannot be sufficiently mastered by the designers. In view of these issues, a simplified limit-state design process was induced to eliminate a large number of iterative operations and was verified by a three-dimensional finite element model (FEM) with a prototype test of PCCPs under internal water pressure. Meanwhile, the bearing performance of PCCPs was investigated using the parametric simulations of the FEM. The results showed that the cross-sectional area of the prestressed steel wire is higher by about 10% than that designed using the AWWA C304 method. The FEM provides a complete evolution process of the mechanical response of the structural constituents and simulates the strain mutation phenomenon of the prototype test well. The internal water pressure of the PCCPs designed using the simplified limit-state design process has enough safety to reach 4.7 times the working pressure at serviceability and 5.5 times the pressure at the ultimate limit state. A burst in the PCCPs took place under an internal pressure greater than 6.75 times the working pressure. The result of the FEM shows that an increase in the tensile strength of the concrete core is of great significance for improving the bearing performance of the PCCPs.

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Proposed Simplified Changes to ANSI/AWWA C304 Standard for Design of Prestressed Concrete Cylinder Pipe

Cited by 2 publications

References 0 publications

Improvement and Implementation of Calculation Method for Prestressed Concrete Cylinder Pipes

Improvement and Implementation of Calculation Method for Prestressed Concrete Cylinder Pipes

A Simplified Limit-State Design and Verification for Prestressed Concrete Cylinder Pipes under Internal Water Pressure

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