Modelling liquefaction-induced building damage in earthquake loss estimation

Bird, Juliet; Bommer, Julian J.; Crowley, Helen; Pinho, Rui

doi:10.1016/j.soildyn.2005.10.002

Cited by 95 publications

(45 citation statements)

References 25 publications

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“…damage in the structural elements due to the large induced deformations) related to the liquefaction phenomena. This phenomenon of SSI added to the foundation type [32] can explain the response of collapsed structures observed during the recent earthquakes, as it is reported by Tokimatsu et al [28] and Juang et al [31] among others. A similar response has been reported in numerical and physical tests [37,38,19,26,35,36].…”

Section: Effects Of Liquefaction In Modifying Seismic Ssisupporting

confidence: 62%

“…In these methodologies the assessment of liquefaction potential is performed using published relationships between the in situ soil properties and the cyclic shear stress induced by ground shaking e.g. Seed and Idriss [21] among others [31,32]. It is well known that these semi-empirical procedures were developed to determine the liquefaction potential of soil profiles in free field conditions.…”

Section: Ssi Analyses 621 Effects Of Structure In the Liquefaction mentioning

confidence: 99%

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Numerical simulation of liquefaction effects on seismic SSI

López-Caballero¹,

Farahmand-Razavi²

2008

Soil Dynamics and Earthquake Engineering

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The present paper deals with the influence of soil non-linearity, introduced by soil liquefaction, on the soil-foundation-structure interaction phenomena. The objective is to reveal the beneficial or unfavourable effects of the non-linear SSI on both structural drift and settlement of a given structure. Factors such as the signal modification due to liquefaction, and ratios of fundamental frequencies of soil, structure and signal may play an important role on the damage of the structure. The importance of each of these factors is evaluated through a significant parametric study. A 2D coupled finite element modelling is carried out using an elastoplastic multimechanism model to represent the soil behaviour. This paper presents the research work we did in the framework of the European Community project NEMISREF (New methods of mitigation of seismic risk on existing foundations, GRDI-40457), to study possible retrofitting measures using GEFDYN computational tools.

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Section: Effects Of Liquefaction In Modifying Seismic Ssisupporting

confidence: 62%

Section: Ssi Analyses 621 Effects Of Structure In the Liquefaction mentioning

confidence: 99%

Numerical simulation of liquefaction effects on seismic SSI

López-Caballero¹,

Farahmand-Razavi²

2008

Soil Dynamics and Earthquake Engineering

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“…Des travaux récents concernant l'évaluation des dommages causés par la liquéfaction sur les construc tions (Juang et al, 2005 ;Bird et al, 2006), soulignent la nécessité de définir l'épaisseur de la couche liquéfié afin d'estimer la déformation permanente du sol. En vue de quantifier l'extension de la zone liquéfiée, on où H est la profondeur choisie (dans ce cas, H = 10 m),  pw (t,z) est l'incrément de pression interstitielle au temps t et à la profondeur z. Afin de représenter l'évolution de QH = 10 m en fonction d'un paramètre de sévérité sismique (e.g.…”

Section: Réponse En Champ Libreunclassified

Apport de la modélisation numérique dans l’analyse des risques sismiques liés à la liquéfaction

López-Caballero

Modaressi-Farahmand-Razavi

2012

Rev. Fr. Geotech.

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Contribution of numerical modeling in the liquefaction seismic risks assessment AbstractThe present paper deals with the influence of soil non-linearity, introduced by soil liquefaction, on the soil-foundationstructure interaction phenomena. Numerical simulations are carried out so as to study an improvement method to reduce the liquefaction potential in a sandy soil profile subjected to a shaking. The efficiency of the confinement walls in the mitigation of a liquefiable soil is showed. However, the intervention at the foundation soil modifies the dynamic characteristics of soil-structure system and it seems to be an unfavorable method from the structural point of view .

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“…Bird and co-workers (Bird et al, 2005b) show that the displacement demand is concentrated in the ground floor column (if the imposed displacement concerns a marginal column), and that the vertical deformation in level ground beneath a single-bayed frame, places the same deformational demand on the members as in a multi-bayed frame.…”

Section: Rc Frame Modelmentioning

confidence: 99%

Parametric studies and quantitative assessment of the vulnerability of a RC frame building exposed to differential settlements

Negulescu¹,

Foerster²

2010

Nat. Hazards Earth Syst. Sci.

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Abstract. The aim of this paper is to propose a simplified methodology to evaluate the mechanical performances of buildings exposed to landslide hazard, by using procedures inspired from the seismic risk analysis, such as the Capacity Spectrum Method (ATC 40, 1996). Landslide hazard involves so many aspects, that quantitative vulnerability assessment requires to consider one basic scenario at a time, i.e. one typology for the landslide hazard and one for the structural element considered. In this paper, we propose to assess vulnerability for simple one bay-one storey reinforced concrete (RC) frame structures subjected to differential settlements, using 2-D parametric nonlinear static time-history analyses. After a short review of methods used in practice to estimate building deformations induced by ground movements (e.g. differential settlements), we present the parametric studies carried out to identify the most relevant parameters, in order to predict the structural damage, as well as the methodology to develop analytical fragility curves, that can be used to quantitatively evaluate the structural vulnerability in landslide risk analyses. Different types of parameters that could influence structural behaviour have been examined in this analysis: foundation type (i.e. different combinations of links), cross-section geometry, section reinforcement degree, displacement magnitudes and displacement inclination angles. We show that the magnitude and inclination angle of displacements can be used as two relevant parameters for this type of landslide scenario. Based on these results, some simulations are conducted using the software SeismoStruct (SeismoSoft, 2003), and the proposed structural damage levels consider the local strain limits of steel and concrete constitutive materials. Some preliminary fragility curves are proposed with respect to the magnitude of differential ground displacement. It can be seen that the curves correspondCorrespondence to: C. Negulescu (c.negulescu@brgm.fr) ing to limit states LS2 (moderate damage) and LS4 (complete damage) in the present study, correspond respectively to the "tolerable settlements" "observed intolerable settlements" curves proposed by Zhang and Ng (2005).

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Modelling liquefaction-induced building damage in earthquake loss estimation

Cited by 95 publications

References 25 publications

Numerical simulation of liquefaction effects on seismic SSI

Numerical simulation of liquefaction effects on seismic SSI

Apport de la modélisation numérique dans l’analyse des risques sismiques liés à la liquéfaction

Parametric studies and quantitative assessment of the vulnerability of a RC frame building exposed to differential settlements

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