Structural performance of buried prestressed concrete cylinder pipes with harnessed joints interaction using numerical modeling

Hajali, Masood; Alavinasab, Ali; Shdid, Caesar Abi

doi:10.1016/j.tust.2015.10.016

Cited by 52 publications

(16 citation statements)

References 17 publications

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“…The gross wrapping stress of the prestressing wire is 75% of the specified minimum tensile strength of the wire, as shown in (10). The yield strength of the wire is 85% of the specified minimum tensile strength of the wire, as shown in (11).…”

Section: Modeling Approachmentioning

confidence: 99%

“…The broken wires are no longer used in the numerical analysis after breakage, which results in no strain in the broken wires, as shown in Figure 16. According to the constitutive relationship in (10) and (11), the actual yield strain of the prestressing wire after wrapping around concrete can be calculated as 1455 . Figure 16 illustrates that no prestressing wire yields.…”

Section: Deformation Of Prestressingmentioning

confidence: 99%

“…Xiong et al [9] took the contribution of the wire stiffness of PCCP into account and developed a wirewrapping model to simulate the process of wrapping wire. Hajali et al [10] analyzed the structural performance of PCCP with broken wires at the spigot joint, bell joint, and barrel using a numerical model.…”

Section: Introductionmentioning

confidence: 99%

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Rehabilitation Effect Evaluation of CFRP-Lined Prestressed Concrete Cylinder Pipe under Combined Loads Using Numerical Simulation

Niu

Dou

et al. 2018

Mathematical Problems in Engineering

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Prestressed concrete cylinder pipe (PCCP) has been widely used for water transfer and transit projects. However, prestressing wire breaks may result in the rupture of pipes and cause catastrophes. Carbon fiber reinforced polymer (CFRP) liners adhered to the inner concrete core can provide an effective method of internal repair and strengthening of PCCP. To evaluate the rehabilitation effect of CFRP-lined PCCP under combined loads, two contrasting three-dimensional finite element models that investigated the visual cracking of concrete and the yielding of steel cylinders were developed. A conceptual zone was introduced to analyze the different states of the pipe during the phase of wire break. In particular, the complex CFRP-concrete bonded interface was simulated by a cohesive element layer with a bilinear traction-separation response. The results show that CFRP has a good rehabilitation effect on the inner concrete core and steel cylinder but only a slight effect on the outer concrete core, prestressing wire, or mortar. A one-hoop CFRP layer diminishes the area of a yielding steel cylinder of 4.72 m2. In addition, CFRP works more effectively along with an increase in the number of broken wires. This research can provide a basis for strengthening distressed PCCP pipelines.

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Section: Modeling Approachmentioning

confidence: 99%

Section: Deformation Of Prestressingmentioning

confidence: 99%

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Rehabilitation Effect Evaluation of CFRP-Lined Prestressed Concrete Cylinder Pipe under Combined Loads Using Numerical Simulation

Niu

Dou

et al. 2018

Mathematical Problems in Engineering

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“…Further, it is considered that the cracks at the inner concrete core and the mortar coating, the corroded steel cylinder, and eventual breakage of enough wires at the barrel led to reduce the strength of the pipe. Hajali et al [43] and Hajali et al [44] It is important to highlight that a structural analysis was not conducted due to the lack of pipe material data. Likewise, it can be expected that the findings of Ge and Sinha [41], Hajali et al [43] and Hajali et al [44] remain valid for the Class 90-14 54-in.…”

Section: Probable Failure Sequencementioning

confidence: 99%

Failure Analysis of a Water Supply Pumping Pipeline System

Pozos‐Estrada

Sánchez-Huerta

Breña-Naranjo

et al. 2016

Water

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This paper describes the most important results of a theoretical, experimental and in situ investigation developed in connection with a water supply pumping pipeline failure. This incident occurred after power failure of the pumping system that caused the burst of a prestressed concrete cylinder pipe (PCCP). Subsequently, numerous hydraulic transient simulations for different scenarios and various air pockets combinations were carried out in order to fully validate the diagnostic. As a result, it was determined that small air pocket volumes located along the pipeline profile were recognized as the direct cause of the PCCP rupture. Further, a detail survey of the pipeline was performed using a combination of non-destructive technologies in order to determine if immediate intervention was required to replace PCC pipes. In addition, a hydraulic model was employed to analyze the behavior of air pockets located at high points of the pipeline.

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“…They suggested that broken wires do not have a significant impact on a PCCP with good mortar adhesion. Hajali et al [24][25][26] considered the pipe-soil interaction, the interaction between neighboring pipes, and internal and external loads in modeling the effects of the position and number of broken wires on a PCCP using a three-dimensional finite element model.…”

Section: Introductionmentioning

confidence: 99%

Using Externally Bonded CFRP to Repair a PCCP with Broken Wires under Combined Loads

Zhai

Fang

et al. 2019

International Journal of Polymer Science

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Prestressed concrete cylinder pipe (PCCP) is widely used for long-distance water pipelines throughout the world. However, prestressing wire breakage is the most common form of PCCP damage. For some pipelines that cannot be shut down, a new technique for in-service PCCP repair by externally bonding the pipe with layers of carbon fiber reinforced polymer (CFRP) was proposed. A set of three-dimensional finite element models of the repaired PCCP have been proposed and implemented in the ABAQUS software, which took into account the soil pressure, the weight of the PCCP, the weight of the water, and the hydrostatic pressure. The stress–strain features of the PCCP repaired with CFRP of various thicknesses were analyzed. The stress–strain features of different wire breakage rates for the repaired PCCP were also analyzed. The results showed that the strains and stresses decreased at the springline if the PCCP was repaired with CFRP, which improved the operation of the PCCP. It has been found that the wire breakage rates had a significant effect on the strains and stresses of each PCCP component, but CFRP failed to reach its potential tensile strength when other materials were broken.

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Structural performance of buried prestressed concrete cylinder pipes with harnessed joints interaction using numerical modeling

Cited by 52 publications

References 17 publications

Rehabilitation Effect Evaluation of CFRP-Lined Prestressed Concrete Cylinder Pipe under Combined Loads Using Numerical Simulation

Rehabilitation Effect Evaluation of CFRP-Lined Prestressed Concrete Cylinder Pipe under Combined Loads Using Numerical Simulation

Failure Analysis of a Water Supply Pumping Pipeline System

Using Externally Bonded CFRP to Repair a PCCP with Broken Wires under Combined Loads

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