Engineering of a contemporary version of the stone arches of the “Pont des Trous” in Tournai

2021 ◽  
Author(s):  
Yves Duchêne ◽  
Vincent de Ville de Goyet ◽  
Frédéric Gens
Keyword(s):  
Finite Element ◽  
Nonlinear Finite Element ◽  
Stone Masonry ◽  
Accurate Estimation ◽  
Political Decision ◽  
Small Thickness ◽  
Finite Element Calculations ◽  
Conventional Structure ◽  
The Stability ◽  
Stone Arches

<p>As part of the works on the Seine-Scheldt link, the Scheldt is to be expanded to CEMT class Va at the Tournai crossing. The main works comprise the widening of the Scheldt river and the central arch of the historic bridge called “Pont des Trous” – “Bridge of the Holes”. The choice of replacing the bridge has gone to a triple arch in stone masonry with a main span of 20 m for a height of 15 m and a thickness of 40 cm, closer from a sculpture. Due to its very small thickness and corresponding self-weight, accurate estimation, with wind tunnel tests by University of Liège, of the wind effects is of utmost importance for the verification of masonry and especially the joints openings. Nonlinear finite element calculations considering cracking and opening of joints, using Finelg software, show that the joints should be glued to ensure the stability. Finally, by political decision, this triple arch project was abandoned and replaced by a more conventional structure.</p>

Stability of Ring-Stiffened Tubular Members Under External Pressure

1995 ◽  
Vol 117 (2) ◽  
pp. 150-155 ◽  
Author(s):  
S. A. Karamanos ◽  
J. L. Tassoulas
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Stability Analysis ◽  
External Pressure ◽  
Nonlinear Finite Element ◽  
Steel Tubes ◽  
Deformation Plasticity ◽  
The Stability ◽  
Element Technique ◽  
Stiffened Steel

This paper presents results of a rigorous nonlinear finite element technique for the stability analysis of ring-stiffened steel tubes under external pressure. Large deformation, plasticity, as well as residual stresses and imperfections, are taken into account. Both internal and external stiffeners are simulated. A study of various parameters which affect pressure capacity is summarized, along with a comparison with available experimental data.

Character of Embankment Reinforced with Geotextile on Sloping Weak Foundation

2010 ◽  
Vol 168-170 ◽  
pp. 1272-1276
Author(s):  
Jin Long Liu ◽  
Jie Qun Liu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Plastic Zone ◽  
Lateral Displacement ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
The Stability ◽  
Peak Value ◽  
Element Method

Based on nonlinear finite element method, the character of embankment reinforced with geotextile on sloping weak foundation has been studied. It is shown that the lateral displacement of embankment has been distinctly effected by the sloping of foundation, the value of lateral displacement on sloping foundation is greatly bigger than that of horizontal foundation. The peak value of lateral displacement can be effectively reduced by geotextile. With the same condition, geotextile in sloping foundation acts a more important effect than that of horizontal foundation. The development of plastic zone of embankment has been impeded and separated by geotextile, which enhanced the stability of embankment. The results also indicated that, if necessary, reinforcement such as anti-slide pile should be layout at lower toe of embankment on sloping weak foundation.

Characters of Expressway Widened Engineering Reinforced with Geotextile

2010 ◽  
Vol 152-153 ◽  
pp. 1166-1170
Author(s):  
Jin Long Liu ◽  
Jie Qun Liu ◽  
Lu Wang Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Lateral Displacement ◽  
High Stress ◽  
Failure Surface ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Stress Zone ◽  
The Stability ◽  
High Stress Zone

Based on nonlinear finite element method, the character of expressway widened engineering reinforced with geotextile is studied. It is found that the main vertical settlement, lateral displacement and failure surface of embankment occurred in the widened part of embankment. The lateral displacement decreased, the total incremental of displacement reduced and the stability of embankment enhanced when expressway widened engineering reinforced with geotextile. It also can be found that the axial force of geotextile get its maximal value at the intersection of old and new part of embankment, which is controlled by the differential settlement and normal stress mainly. In order to reinforce the embankment effectively, it is advised that the geotextile should be paved on high-stress zone.

Numerical Analysis of Back Berm on Road Engineering with FEM

2013 ◽  
Vol 748 ◽  
pp. 1087-1090
Author(s):  
Jie Qun Liu ◽  
Dong Lin Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Analysis ◽  
Lateral Displacement ◽  
Critical Value ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Road Engineering ◽  
The Stability ◽  
Element Method

Based on nonlinear finite element method (FEM), the effect of back berm has been systematically studied. It is found that the lateral displacement of embankment could be reduced by back berm effectively, and the stability of embankment increased rapidly with the width of back berm enlarged. There is a critical value of width of back berm, that the stability of embankment is no more increased with the width of back berm enlarged than critical value.

Nonlinear Finite Element Analysis of the Stability of Gravity Platform

2014 ◽  
Vol 578-579 ◽  
pp. 292-295
Author(s):  
Xin Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Nonlinear Effect ◽  
Oil Field ◽  
Nonlinear Finite Element ◽  
Interface Element ◽  
Contact Interface ◽  
Element Analysis ◽  
The Stability ◽  
Gravity Platform

Gravity platform was widely used in the development of marginal oil field, but the existence of scour pit caused by the flow and wave increasing the possibility to overturn. The paper introduced the no depth contact interface element to simulate the nonlinear effect between the bucket skirt and soil, and introduced the birth-death element to simulate the increasing scour pit. The results provide guidance to prevent overturning.

Reinforcement Analysis of Wanjiakouzi Arch Dam Using 3D Nonlinear Finite Element Method

2011 ◽  
Vol 255-260 ◽  
pp. 3472-3477
Author(s):  
Wei Wei ◽  
Qing Hui Jiang ◽  
Chi Yao ◽  
Tao Xie
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Bands ◽  
Nonlinear Finite Element ◽  
Arch Dam ◽  
Nonlinear Finite Element Method ◽  
Dam Foundation ◽  
Weak Rocks ◽  
The Stability ◽  
Element Method

Wanjiakouzi arch dam is constructed in a complex geological site, where a large number of faults, interlayer shear bands and karst zones exist in the dam foundation and abutments. The weak rocks have a bad effect on the stability of the arch dam. In this paper, the displacement distribution and stress field of the arch dam are analyzed using 3D nonlinear finite element method. The numerical results show that displacement between both left and right bank abutments is obviously asymmetric and there is greater compression and shear deformation along the faults under the thrust of the arch dam. Furthermore, the tensile stress at dam heel cannot meet the requirement of the design specifications. Therefore, it is necessary to reinforce the dam foundation and abutments to improve the ability to resist deformation of abutment. By taking such reinforcement measures as concrete plugs and consolidation grouting for weak zones, the asymmetric displacements between abutments are decreased significantly and the tensile stresses of dam heel meet the stability requirement.

scholarly journals A three-pronged approach to predict the effect of plastic orthotropy on the formability of thin sheets subjected to dynamic biaxial stretching

2020 ◽  
Author(s):  
Jose Rodriguez-Martinez ◽  
Komi Espoir N'souglo ◽  
Nicolas Jacques
Keyword(s):  
Finite Element ◽  
Stability Analysis ◽  
Linear Stability ◽  
Linear Stability Analysis ◽  
Zone Model ◽  
Strain Rates ◽  
Biaxial Stretching ◽  
Loading Paths ◽  
Finite Element Calculations ◽  
The Stability

In this paper, we have investigated the effect of material orthotropy on the formability of metallic sheets subjectedto dynamic biaxial stretching. For that purpose, we have devised an original three-pronged methodology which includes a linear stability analysis, a nonlinear two-zone model and ?finite element calculations. We have studied 5 different materials whose mechanical behavior is described with an elastic isotropic, plastic anisotropic constitutive model with yielding based on Hill (1948) criterion. The linear stability analysis and the nonlinear two-zone model are extensions of the formulations developed by Zaera et al. (2015) and Jacques (2020), respectively, to consider Hill (1948) plasticity. The ?finite element calculations are performed with ABAQUS/Explicit (2016) using the unit-cell model developed by Rodriguez-Martinez et al. (2017), which includes a sinusoidal spatial imperfection to favor necking localization. The predictions of the stability analysis and the two-zone model are systematically compared against the ?finite element results --which are considered as the reference approach to validate the theoretical models-- for loading paths ranging from plane strain stretching to equibiaxial stretching, and for different strain rates ranging from 100 s-1 to 50000 s-1. The stability analysis and the two-zone model yield the same overall trends obtained with the ?finite element simulations for the 5 materials investigated, and for most of the strain rates and loading paths the agreement for the necking strains is also quantitative. Notably, the differences between the ?finite element results and the two-zone model rarely go beyond 5%. Altogether, the results presented in this work provide new insights into the mechanisms which control dynamic formability of anisotropic metallic sheets.

Design and Stability Analysis of Latticed Shell Structure in Site of Tianluoshan

2012 ◽  
Vol 193-194 ◽  
pp. 864-867
Author(s):  
Wen Feng Du ◽  
Zhi Fei Sun
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stability Analysis ◽  
Shell Structure ◽  
Nonlinear Finite Element ◽  
Nonlinear Finite Element Method ◽  
Geometrical Nonlinear ◽  
The Stability ◽  
Element Method ◽  
Geometrical Nonlinear Finite Element

The design and analysis of the large span steel latticed shell structure in site of Yuyao TianLuoshan is introduced, and some key problems are dwelled on in this paper. By the geometrical nonlinear finite element method, the nonlinear stability analysis is carried out. The buckling modal and the whole course of instability are shown by two analysis method, the eigen-buckling analysis and the geometrical nonlinear finite element method. The influence of spring support to the stability of the structure is analyzed. It is shown that the structure has good wind-resisting capacity, which is fit to the circumstance near sea with lots of typhoon. Large compressive membrane stresses arise in the structure under the condition of temperature rise, leading to a significant reduction in the stability load-carrying capacity of the structure.

Nonlinear Finite Element Analysis of Pressurized Spherical Shell for Deep Water Structure

2007 ◽  
Author(s):  
Liangbi Li ◽  
Renhua Wang ◽  
Minghua Yu ◽  
Zili Wang
Keyword(s):  
Finite Element ◽  
Spherical Shell ◽  
Deep Water ◽  
Water Structure ◽  
Nonlinear Finite Element ◽  
Yield Strain ◽  
Element Analysis ◽  
The Stability ◽  
Material Nonlinear ◽  
Critical Buckling Pressure

One of the main problems in developing the deep water structure is the stability of the pressurized spherical shell. If the pressurized spherical shell belongs to moderate thick shell, the transverse shear deformation must be taken into account. Based on the nonlinear finite element method, the stability of the pressurized spherical shell under deep water was studied in this paper. The influence of out of roundness due to the machining, the interaction between material nonlinear and geometry nonlinear were considered. They are caused by material yield, strain intensifying and big plastic deformation of the whole shell structure buckling. Results from calculation showed that the critical buckling pressure decreases with the increasing of the radius under the same thickness but increases with the thickness under the same radius. The relationship charts of the critical buckling pressure, the thickness, the radius of the pressurized spherical shell were derived. The reasonable geometric parameters were then selected.

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