Seismic Vulnerability of a Rockfill Dam through Different Displacement-based Approaches

Vecchietti, Alessia; Cecconi, Manuela; Russo, Giacomo; Pane, Vincenzo

doi:10.1080/13632469.2019.1662346

Cited by 7 publications

(2 citation statements)

References 46 publications

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“…Presently, the number of seismic analytical fragility functions for earth dams is very limited and always based on input selections performed using uniform hazard spectra (UHS) (e.g. Jin and Chi, 2019; Vecchietti et al, 2019, both for rockfill dams). Table 1 summarizes the main studies on fragility functions on some infrastructure systems, for different DM and IM; the dispersion β is also reported.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the optimal ground motion intensity measure in the prediction of the seismic vulnerability of earth dams

et al. 2023

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The large majority of existing earth dams were designed with old standards, which often accounted for the effects of earthquakes in a simplified manner. As a result, seismic re-evaluation of these structures is now becoming increasingly important for dam owners. The seismic performance of earth dams can be evaluated at different levels of resolution, typically ranging from simple sliding block analysis, to the use of advanced numerical models. Seismic inputs for these models are typically chosen using code-based or site-specific probabilistic seismic hazard analysis (PSHA). In this study, we analyze the seismic vulnerability of two major earth dams located in Southern Italy, a seismically active area. The two dam systems have different geotechnical characteristics: one of them is founded on potentially liquefiable materials, whereas the other one is not susceptible to liquefaction. Our analyses are based on finite difference numerical simulations using both simplified and advanced constitutive models. Seismic vulnerability of both dams is analyzed by means of analytical fragility functions for various damage mechanisms and ground motion intensity measures (IMs). Such fragility functions are based on nonlinear deformation analyses within the multiple stripe analysis framework. We analyze efficiency and predictability of various IMs in predicting different damage levels and mechanisms. We show that the cumulative absolute velocity is overall the optimal IM in predicting vulnerability of both earth dams. We also analyze the relative importance of PSHA inputs (i.e. alternative ground motion and earthquake rupture forecast models; GMMs and ERFMs, respectively) and numerical models (simplified vs advanced) in the seismic analysis of earth dams by means of tornado diagrams. We show that the choice of GMMs and ERFMs is always more important than that of the constitutive model. However, for dams prone to liquefaction, the choice of the constitutive model has a higher importance than for non-liquefiable earth dams.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the optimal ground motion intensity measure in the prediction of the seismic vulnerability of earth dams

et al. 2023

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“…After that, many scholars have made a series of improvements. Critical slip surface is generally regarded as a single circular arc in previous studies (Bojadjieva et al, 2018; Roy et al, 2016; Vecchietti et al, 2019; Yang & Kavazanjianb, 2022; Yuan et al, 2015), because the shape is very simple and can better show the critical slip surface of slope, but it is difficult to accurately present the non‐circular critical slip surface. Moreover, the strength characteristics of soil are not considered in the calculation of the circular slip surface.…”

Section: Introductionmentioning

confidence: 99%

One simplified method for seismic stability analysis of an unsaturated slope considering seismic amplification effect

Huang¹,

Tao

Wang

2023

Geological Journal

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Seismic amplification effect in soil slope is not considered by traditional Newmark method; therefore, there will be some deviation in soil slope seismic stability analysis. In order to determine the effect of seismic amplification effect, a simplified method for unsaturated slope stability evaluation is proposed by coupling the Sweden slice method and Newmark method. Research results show that the seismic amplification effect has a great influence on yield acceleration of the slope while it exerts a little influence on critical slip surface shape; if the seismic amplification effect is not considered, permanent displacement of the slope will be underestimated, and there is potential danger in seismic design of slope engineering. Finally, an unsaturated slope model with 1:20 scale is designed through derivation of similarity law, and progressive failure process of the slope under seismic action is simulated. The results of our proposed method are in good agreement with experimental results, which proves the feasibility of our proposed method. This study can provide a simple and reliable method for evaluating the seismic stability of an unsaturated slope.

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Seismic Analyses of Menta Embankment Dam: Formulation and Synthesis of Results

Russo

Cecconi

Vecchietti

et al. 2020

Lecture Notes in Civil Engineering

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Seismic Vulnerability of a Rockfill Dam through Different Displacement-based Approaches

Cited by 7 publications

References 46 publications

Evaluation of the optimal ground motion intensity measure in the prediction of the seismic vulnerability of earth dams

Evaluation of the optimal ground motion intensity measure in the prediction of the seismic vulnerability of earth dams

One simplified method for seismic stability analysis of an unsaturated slope considering seismic amplification effect

Seismic Analyses of Menta Embankment Dam: Formulation and Synthesis of Results

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