Flexible culverts in sloping terrain: Numerical simulation of soil loading effects

Wadi, Amer; Pettersson, Lars; Karoumi, Raid

doi:10.1016/j.engstruct.2015.07.004

Cited by 22 publications

(12 citation statements)

References 7 publications

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“…4). The magnitude and the distribution of this displacement were approximately derived from a simplified equivalent 2D model using a multilayer backfilling model similar to the method used in earlier 2D studies [49,50].…”

Section: Backfilling Of Soilmentioning

confidence: 99%

“…The normal forces had Obviously, the used method in the model does not predict the maximum response (bending moments and displacement) of the arch during the backfilling, which is normally occurring when the backfill level is at the crown. However, if one uses the method described by Wadi et al [49,50], the method will predict a maximum vertical displacement of the crown of around 85 mm (0.5% of the span) and a maximum negative bending moment of − 67 kNm/m both occurring when the backfill level reaches the crown. This is again considered realistic compared to the 17.7-m span tested structure [61], where it had a maximum negative bending moment and a deflection of − 54 kNm/m and 80 mm, respectively.…”

Section: Soil Load Effectsmentioning

confidence: 99%

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On Predicting the Ultimate Capacity of a Large-Span Soil–Steel Composite Bridge

Wadi

Pettersson

Karoumi

2020

Int. J. of Geosynth. and Ground Eng.

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The limit state design of large-span soil–steel composite bridges (SSCB) entails that understanding their structural behaviour in the ultimate state is as much needed as their performance under service conditions. Apart from box culverts, the largest loading-to-failure test was done on a 6.3-m span culvert. More tests on larger spans are believed essentially valuable for the development of the design methods. This paper presents the numerical simulation efforts of an 18.1-m span SSCB pertaining to its ongoing preparations for a full-scale field test. The effect of the different loading positions on the ultimate capacity is investigated. Comparisons are made between three-dimensional (3D) and two-dimensional (2D) models. The results enabled to realise the important role of the soil load effects on the ultimate capacity. It is found that the failure load is reduced when the structure is loaded in an asymmetrical manner. A local effect is more pronounced for the live load when the tandem load is placed closer to the crown. The study also illustrates the complex correlation between 3D and 2D models, especially if one attempts to simultaneously associate sectional forces and displacements.

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Section: Backfilling Of Soilmentioning

confidence: 99%

Section: Soil Load Effectsmentioning

confidence: 99%

On Predicting the Ultimate Capacity of a Large-Span Soil–Steel Composite Bridge

Wadi

Pettersson

Karoumi

2020

Int. J. of Geosynth. and Ground Eng.

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“…The part surrounding the shell is the slope characterised by variable thickness made of soil powder. The analysed issue is connected with the changes of internal forces in the shell during the construction of an object [5].…”

Section: D Geometry Modelsmentioning

confidence: 99%

Numerical Modelling of Engineering Soil Shell Structure

2016

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NTRODUCTIONSoil steel structures are engineering objects used as bridge structures: flyovers, footbridges, culverts, tunnels, underpasses, access roads and passages for wild animals. Many of them are used as municipal facilities, usually they are closed ducts (pipes) or they can be used for transport, e.g. conveyor casings. They are built-in and have a form of a shell covered with specially condensed soil. They are designed in such a way that they are durable thanks to the beneficial cooperation between the main elements of Abstract:The purpose of this article is to provide examples of models used in ground and shell design in engineering facilities made using corrugated sheets, such as roads and rail. Despite the small size of culverts designed for transport use, sophisticated computational models are applied to faithfully reproduce them. To calculate internal forces and displacements resulting from the utility load, spatial 3D models with a very large number of elements are used. The paper discusses simplified 2D models allowing to accurately represent an object and its operation. The focus is on discussing three ways of discretization of a shell in the form of: corrugated metal, rod mesh and orthotropic shell.

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“…Mai et al (2014b) presented the 2D finite element analysis for the deteriorated corrugated metal culverts with a span of 1.8 m. All the finite element models were unable to capture non-linear behaviour of the deteriorated culvert with poor backfill as well as the culverts at high surface loading due to the use of linear elastic models. Wadi et al (2015) presented the numerical analysis of CSP culvert located in sloping terrain and considered the simulation of the soil loading effects. Beben, Stryczek (2016) presented a numerical modelling of a soil-steel bridge with reinforced concrete (RC) relieving slab.…”

Section: Introductionmentioning

confidence: 99%

The Role of Backfill Quality on Corrugated Steel Plate Culvert Behaviour

Bęben

2017

The Baltic Journal of Road and Bridge Engineering

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The subject of the article is a three-dimensional numerical analysis of the impact of backfill quality on the deformation of corrugated steel plate culvert. In the numerical analysis, the author took into consideration three different backfill types. The paper presents the calculations performed with the use of Abaqus program based on finite element method. A steel shell was modelled with the use of the theory of orthotropic plates, and backfill with the use of elastic-perfectly plastic Drucker-Prager model. The author made the numerical calculations under static live loads for the corrugated steel plate culvert with a span of 12.315 m and height of shell of 3.555 m. Soil cover over the shell crown was equal to 1.0 m. The steel shell consisted of the sheets of the corrugation of 0.14×0.38 m and plate thickness of 0.0071 m. The main aim of this paper is to present the impact of backfill quality (internal friction angle, unit weight, Young’s modulus) on the effort of the steel shell. The paper also shows the numerical calculations for the actual culvert, which previously had been studied experimentally. The author compared the obtained numerical results to the results of experiments. Parametric analysis showed that the angle of internal friction was a major factor in corrugated steel plate culverts. Considering the entire width of the corrugated steel plate culvert, the calculation model II was most favourable. The proposed method of modelling of the corrugated steel plate culvert allowed obtaining reasonable values of displacements and stresses in comparison to experimental results.

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Flexible culverts in sloping terrain: Numerical simulation of soil loading effects

Cited by 22 publications

References 7 publications

On Predicting the Ultimate Capacity of a Large-Span Soil–Steel Composite Bridge

On Predicting the Ultimate Capacity of a Large-Span Soil–Steel Composite Bridge

Numerical Modelling of Engineering Soil Shell Structure

The Role of Backfill Quality on Corrugated Steel Plate Culvert Behaviour

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