Analyse des déformations discontinues pour lʼévaluation de la stabilité des digues en enrochements sous chargement sismique

Kaidi, Sami; Ouahsine, Abdellatif; Sergent, Philippe; Rouainia, Mohamed

doi:10.1016/j.crme.2012.10.041

Cited by 11 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the minimization of potential energy Π i with respect to the displacement variable {Di} leads to: 20 where true{Fitrue}=true[Titrue]Ttrue{fitrue} and true[Kiitrue]=∫Ai [C]T[H][C]dAi=Ai[C]T[H][C].…”

Section: Mathematical Formulation Of the Dda Methodsmentioning

confidence: 99%

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Ding

Ouahsine

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

View full text Add to dashboard Cite

A numerical study using the Discontinuous Deformation Analysis (DDA) method is proposed to analyze the effect of the caisson sliding subjected to a hydrodynamic loading in the stability of the rear side of the caisson-type breakwater. The study takes into account the slope inclination of the breakwater as well as the contact between the armour units constituting the shoreward of the breakwater, where the contact stresses are imposed through a penalty method. A dimensionless displacement parameter, [Formula: see text], is defined to investigate the instability of armor units. The results of the simulation show that the shape of the armour units plays an important role in the stability of the breakwater, where the tetrapods and the acropods give better stability than the cubic shapes, with a clear superiority of the tetrapods. They also show that the reduction in the slope clearly contributes to the stability of caisson up to a slope of 1: 2, but below this ratio of 1: 2 this stability is no longer obvious. Furthermore, a new relation of the displacement of the armour units according to the slope is established.

show abstract

Section: Mathematical Formulation Of the Dda Methodsmentioning

confidence: 99%

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Ding

Ouahsine

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

View full text Add to dashboard Cite

show abstract

“…In slope analysis, Wu, Zhang, Fu, Huang, and Wang et al [19][20][21][22][23] simulated the failure process of starting, moving, and stacking of Tsaoling landslide, Daguangbao landslide, Ganjiazhai landslide, Niumiangou landslide, and Donghekou landslide under seismic action. In terms of dam analysis, Shyu, Kong, and Kaidi et al [24][25][26] evaluated the seismic stability of a typical arch dam and rockfill dam. Relatively speaking, there are few DDA results of the seismic response of tunnels [27,28].…”

Section: Introductionmentioning

confidence: 99%

Investigation of 2D Seismic DDA Method for Numerical Simulation of Shaking Table Test of Rock Mass Engineering

Kang

Sheng

et al. 2022

Mathematics

View full text Add to dashboard Cite

Since the basic theory of the discontinue deformation analysis (DDA) method was proposed, the DDA open source has gone through a long development process. At present, different kinds of programs have been widely applied in rock mass engineering such as slope, dam, and tunnel. This paper introduces the solution principle of DDA motion equations in detail, as well as the development status of the 2D open-source program. Numerical simulation of shaking table test of rock mass engineering using 2D DDA program is highlighted, and investigations of seismic wave pre-processing and seismic input method are carried out. First, based on the Newmark integration scheme, the integration algorithms of synthetic or measured seismic wave time history, correction function of seismic wave, and DDA simulation are unified. Then, three seismic input methods are implanted in the DDA program, and the applicability of various seismic input methods is discussed. On this basis, using the improved seismic 2D DDA program, a shaking table test of typical rock mass engineering is simulated. Through the comparison between the theoretical/test data and simulation results, the reliability of the improved DDA program in seismic response analysis is verified; the large mass method and the large stiffness method are more suitable for rigid foundation, such as shaking table test; the propagation of the seismic wave presents a significant amplification effect due to the reflection, refraction, and diffraction in the tunnel. The research results provide DDA theory and an open-source program for analyzing the seismic response of rock mass engineering.

show abstract

Boundary setting method for the seismic dynamic response analysis of engineering rock mass structures using the discontinuous deformation analysis method

Sheng

Zhang

et al. 2015

Int. J. Numer. Anal. Meth. Geomech.

View full text Add to dashboard Cite

SUMMARYLarge deformations and discontinuous problems can be calculated using the discontinuous deformation analysis (DDA) method by solving time steps, and this method is suitable for simulating the seismic dynamic response of engineering rock mass structures. However, the boundary setting must be carefully analyzed. In this paper, four boundary settings for the DDA method are investigated. First, the contributions to the DDA equations for nonreflecting boundaries (including the viscous boundary and the viscoelastic boundary) are deduced based on the Newmark method. Second, a free-field boundary is introduced in the DDA method with boundary grid generation and coupling calculation algorithms to accurately simulate external source wave motion, such as earthquakes. Third, seismic input boundary treatments are intensively examined, and the force input method is introduced based on nonreflecting boundaries. Finally, the staticdynamic unified boundary is implemented to ensure consistent boundary transformation. The boundary setting method in the DDA method is discussed, and the suggested treatments are used to analyze the seismic dynamic response of underground caverns.

show abstract

Analyse des déformations discontinues pour lʼévaluation de la stabilité des digues en enrochements sous chargement sismique

Abstract: Analyse des déformations discontinues pour l'évaluation de la stabilité des digues en enrochements sous chargement sismique Discontinuous Deformation Analysis to assess the stability of rockfill dams under seismic loading

Cited by 11 publications

References 6 publications

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Stability of caisson-type breakwater subjected to strong hydrodynamic impacts using discontinuous deformation analysis method

Investigation of 2D Seismic DDA Method for Numerical Simulation of Shaking Table Test of Rock Mass Engineering

Boundary setting method for the seismic dynamic response analysis of engineering rock mass structures using the discontinuous deformation analysis method

Contact Info

Product

Resources

About