Three-dimensional seismic analysis of submarine slopes

Azizian, A.; Popescu, Radu

doi:10.1016/j.soildyn.2005.10.008

Cited by 19 publications

(4 citation statements)

References 28 publications

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“…The dynamic response of slopes differs with the rock-soil materials and structures (Li and Cai 2020;Marzoratia et al 2012;Jibson 2011;Azizian and Popescu 2006). In the same slope, the dynamic response varies from part to part.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of rock slope with anti-dip weak interlayer and its influencing factors under seismic actions

et al. 2021

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The load features of ground motion are mainly reflected by three factors: amplitude, frequency, and duration. The combination of these factors determines the response of rock-soil mass and the structure safety under seismic load. By finite element method, this paper analyzes the influence of the three factors of ground motion on the dynamic response of a slope. The analysis shows that the slope displacement increased with the elevation from the bottom. The anti-dip fault puts the slope in an unfavorable deformation state. Due to the large residual deformation in the fault zone, a large displacement occurred on the slope top. It was also learned that the adjustment of amplitude only leads to proportional growth in the absolute value of the acceleration of the slope. Under the same conditions, the dynamic responses in different parts of the target slope are not greatly affected by the changing amplitude, but depend more on the material and spectral features of the rock-soil mass. The research results provide a reference for the evaluation and prediction of slope seismic stability and the evolution of slope damage under earthquakes with different frequencies, amplitudes, and durations.

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Section: Introductionmentioning

confidence: 99%

Dynamic response of rock slope with anti-dip weak interlayer and its influencing factors under seismic actions

et al. 2021

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“…Duncan, 1996) that have concluded that consideration of 3-D response improves the static safety factor. The studies reported in Azizian and Popescu (2006) for 3-D seismic analyses of submarine slopes have also concluded that the results of 2-D and 3-D analyses are generally close. The above studies have focused on the effect of 3-D model extension on the critical failure surface.…”

Section: Three-dimensional Geometrymentioning

confidence: 75%

Earthquake Geotechnics in Offshore Engineering

Kaynia

2018

Recent Advances in Earthquake Engineering in Europe

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This paper presents a number of geotechnical issues encountered in earthquake design of offshore structures and subsea facilities. Parallel with construction of traditional structures such as jackets and gravity-based structures, a considerable effort has recently been put to field developments in deep water. This has brought about other challenges that are largely dependent on geotechnical knowledge. This paper addresses some of the more recent approaches and solutions in geotechnical earthquake design of both shallow water and deep-water structures and facilities such as platforms with large bases, pipelines traversing slopes and seabed installations. It is demonstrated how incorporation of radiation damping and nonlinear soil-structure interaction in offshore installations could optimize the design. Considering the importance of earthquake stability of slopes in deep water development, special attention is given to highlighting several key issues in the earthquake response of submarine slopes including strain softening and three-dimensional shaking.

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“…Similarly, the permanent displacements along curved surfaces are smaller than their 1-D approximations. Azizian & Popescu (2006) used 2D and 3D non-linear finite element models for earthquake slope stability assessments in the context of submarine slopes. Figure 13 displays, as an example, the permanent shear strains at the end of a simple monochromatic earthquake excitation with frequency 2 Hz in two clay slopes, one with a height of 5m and slope 30 degrees (Fig.…”

Section: Two-dimensional Effectsmentioning

confidence: 99%

Seismic Triggering of Submarine Slides

2007

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractEarthquakes are known to have triggered major submarine mass movements all over the world. In offshore areas with minor sedimentation at present, earthquakes are the most important release factor for natural submarine slides. The paper describes the different earthquake-induced load effects that could make a submarine slope unstable and trigger a slide. In the assessment of seismic stability of a submarine slope, three scenarios should be evaluated and analyzed: 1) Failure occurs during the earthquake. In this scenario, the excess pore pressures generated by the cyclic stresses degrade the shear strength so much that the slope is not able to carry the static shear stresses; 2) Post-earthquake failure due to increase in excess pore pressure at critical locations caused by seepage from deeper layers; and 3) Post-earthquake failure due to creep. The paper discusses the mechanisms involved in the three scenarios and types of laboratory tests and numerical analyses that should be done to evaluate the seismic stability situation.

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Three-dimensional seismic analysis of submarine slopes

Cited by 19 publications

References 28 publications

Dynamic response of rock slope with anti-dip weak interlayer and its influencing factors under seismic actions

Dynamic response of rock slope with anti-dip weak interlayer and its influencing factors under seismic actions

Earthquake Geotechnics in Offshore Engineering

Seismic Triggering of Submarine Slides

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