Experimental-numerical study on the structural failure of concrete sewer pipes

Scheperboer, I.C.; Luimes, R.A.; Suiker, A.S.J.; Bosco, E.; Clemens, F.H.L.R.

doi:10.1016/j.tust.2021.104075

Cited by 19 publications

(11 citation statements)

References 49 publications

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“…The breaking test of the egg-shaped concrete pipe, a type of the complex cross-section, can be compared. While cracks occurred in the 6 o'clock direction (invert) in the eggshaped concrete pipe [22,23], this was not the case for the complex cross-section reinforced concrete pipe. This appears to be because the bottom of the complex cross-section reinforced concrete pipe is thicker than that of the egg-shaped concrete pipe and it is reinforced in a rectangular shape.…”

Section: Test Contentmentioning

confidence: 87%

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Hydraulic and Structural Analysis of Complex Cross-Section Reinforced Concrete Pipes to Improve Sewage Flow in a Combined Sewer System

Kang

Koo

et al. 2021

Water

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A complex cross-section reinforced concrete pipe that combines a sub-pipe for the flow of sewage in dry weather and a main pipe for the flow of rainwater was developed to reduce sedimentation of the combined sewer system in dry weather. The sub-pipe was designed, considering the flow velocity, constructability, and maintenance. By fitting the sewage data in the dry weather to the normal distribution, the ratio of the cross-sectional area of sewage flow to that of the pipe was determined to be approximately 0.418, which could cover 99.85% of the sewage volume of the target site. Based on this ratio, the diameter of the sub-pipe corresponding to the combined sewer system with a pipe diameter between 450 and 1300 mm was determined. The hydraulic performance analysis results showed that the flow velocity increased by 11 to 12% compared to the circular pipe based on the full sub-pipe and by more than 15% depending on the water level. The shear stress increased by more than 16.5%, and higher tractive force was observed. Structural safety was determined as the crack load and failure load far exceeded the minimum criteria, thereby verifying the feasibility and field applicability of the complex cross-section reinforced concrete pipe.

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Section: Test Contentmentioning

confidence: 87%

“…A similar pattern, however, was observed. In a study by Scheperboer et al [22], when a circular pipe failed, symmetrical cracks occurred in four directions. For an egg-shaped concrete pipe, which has a similar function to the pipe proposed in this study, symmetrical cracks also occurred in four directions.…”

Section: Structural Strength Analysismentioning

confidence: 99%

Hydraulic and Structural Analysis of Complex Cross-Section Reinforced Concrete Pipes to Improve Sewage Flow in a Combined Sewer System

Kang

Koo

et al. 2021

Water

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“…This modelling strategy was originally proposed in Xu and Needleman (1994), and allows for the robust simulation of crack patterns at arbitrary locations and in arbitrary directions. It naturally includes the effects of crack bifurcation, crack branching and crack coalescence, as previously demonstrated for applications related to historical paints (Eumelen et al, 2019(Eumelen et al, , 2020(Eumelen et al, , 2021, wood (Luimes et al, 2018;Scheperboer et al, 2019;Luimes and Suiker, 2021), polymers (Tijssens et al, 2000), fibrous composites (Cid Alfaro et al, 2010a,b;Geng and Suiker, 2019) and cementitious materials (Scheperboer et al, 2021). The interface elements are characterised by the interface damage model proposed in Cid Alfaro et al (2009).…”

Section: Interface Damage Modelmentioning

confidence: 99%

Chemo-mechanical model for degradation of oil paintings by amorphous and crystalline metal soaps

Eumelen

Bosco

Suiker

et al. 2023

European Journal of Mechanics - A/Solids

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“…Various experimental and numerical studies have addressed the effect of erosion voids on the stresses generated in pipe systems and in the surrounding soil, whereby the stress redistribution caused by the appearance of an erosion void is found to be characterized by its location, size and contact angle [41,47,61,68,71]. Since under void erosion the load transfer from the surrounding soil to the pipe generally takes place more localized, whereby the load magnitude increases, the susceptibility of the pipe system to cracking and damage, and thus to catastrophic failure, also increases [42,51,60,68].…”

Section: Introductionmentioning

confidence: 99%

A coupled hydro-mechanical model for subsurface erosion with analyses of soil piping and void formation

et al. 2022

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A coupled hydro-mechanical erosion model is presented that is used for studying soil piping and erosion void formation under practical, in-situ conditions. The continuum model treats the soil as a two-phase porous medium composed of a solid phase and a liquid phase, and accounts for its elasto-plastic deformation behaviour caused by frictional sliding and granular compaction. The kinetic law characterizing the erosion process is assumed to have a similar form as the type of threshold law typically used in interfacial erosion models. The numerical implementation of the coupled hydro-mechanical model is based on an incremental-iterative, staggered update scheme. A one-dimensional poro-elastic benchmark problem is used to study the basic features of the hydro-mechanical erosion model and validate its numerical implementation. This problem is further used to reveal the interplay between soil erosion and soil consolidation processes that occur under transient hydro-mechanical conditions, thereby identifying characteristic time scales of these processes for a sandy material. Subsequently, two practical case studies are considered that relate to a sewer system embedded in a sandy soil structure. The first case study treats soil piping caused by suffusion near a sewer system subjected to natural ground water flow, and the second case study considers the formation of a suffosion erosion void under strong ground water flow near a defect sewer pipe. The effects on the erosion profile and the soil deformation behaviour by plasticity phenomena are elucidated by comparing the computational results to those obtained by modelling the constitutive behaviour of the granular material as elastic. The results of this comparison study point out the importance of including an advanced elasto-plastic soil model in the numerical simulation of erosion-driven ground surface deformations and the consequent failure behaviour. The numerical analyses further illustrate that the model realistically predicts the size, location, and characteristic time scale of the generated soil piping and void erosion profiles. Hence, the modelling results may support the early detection of in-situ subsurface erosion phenomena from recorded ground surface deformations. Additionally, the computed erosion profiles may serve as input for a detailed analysis of the local, residual bearing capacity and stress redistribution of buried concrete pipe systems.

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Experimental-numerical study on the structural failure of concrete sewer pipes

Cited by 19 publications

References 49 publications

Hydraulic and Structural Analysis of Complex Cross-Section Reinforced Concrete Pipes to Improve Sewage Flow in a Combined Sewer System

Hydraulic and Structural Analysis of Complex Cross-Section Reinforced Concrete Pipes to Improve Sewage Flow in a Combined Sewer System

Chemo-mechanical model for degradation of oil paintings by amorphous and crystalline metal soaps

A coupled hydro-mechanical model for subsurface erosion with analyses of soil piping and void formation

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