Liquefaction damage potential for seismic hazard evaluation in urbanized areas

Vessia, Giovanna; Venisti, N.

doi:10.1016/j.soildyn.2011.02.005

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Several theoretical and experimental studies performed worldwide in the last 50 years (see Kramer 1996 and the reference herein), highlighted that seismic shaking intensity is due to the magnitude of the earthquake generated at the source, to the travel paths of the seismic waves from the source to the buried or outcropping bedrock (that is called reference seismic hazard RSH) and the additional phenomena of local amplification or de-amplification take place where soil deposits overlay the rocky bedrock, named local seismic response LSR (Paolucci 2002;Vessia and Venisti 2011;Vessia and Russo 2013;Vessia et al , 2017Boncio et al 2018, among others). The RSH maps drawn worldwide on national territories do not take into account the results of LSR studies.…”

Section: Background On Seismic Hazard Assessmentmentioning

confidence: 99%

“…In addition, the distortions in Gutenberg-Richter law, defined for different regions worldwide and the uncertainties related to the GMPEs can generate underestimations of the seismic shaking parameters (i.e. PGA) at specific sites where local seismic effects are relevant (Paolucci 2002;Vessia and Venisti 2011;Vessia and Russo 2013;Yagoub 2015;Miyajima et al 2019;Lanzo et al 2019;among others). Logic trees are commonly used to take into account different formulations of GMPEs and several Gutenberg-Richter rates of magnitude occurrence (Kramer 1996).…”

Section: Background On Seismic Hazard Assessmentmentioning

confidence: 99%

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Lessons from April 6, 2009 L’Aquila earthquake to enhance microzoning studies in near-field urban areas

Vessia

Rainone

Santis

et al. 2020

Geoenviron Disasters

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This study focuses on two weak points of the present procedure to carry out microzoning study in near-field areas: (1) the Ground Motion Prediction Equations (GMPEs), commonly used in the reference seismic hazard (RSH) assessment; (2) the ambient noise measurements to define the natural frequency of the near surface soils and the bedrock depth. The limitations of these approaches will be discussed throughout the paper based on the worldwide and Italian experiences performed after the 2009 L'Aquila earthquake and then confirmed by the most recent 2012 Emilia Romagna earthquake and the 2016-17 Central Italy seismic sequence. The critical issues faced are (A) the high variability of peak ground acceleration (PGA) values within the first 20-30 km far from the source which are not robustly interpolated by the GMPEs, (B) at the level 1 microzoning activity, the soil seismic response under strong motion shaking is characterized by microtremors' horizontal to vertical spectral ratios (HVSR) according to Nakamura's method. This latter technique is commonly applied not being fully compliant with the rules fixed by European scientists in 2004, after a 3-year project named Site EffectS assessment using AMbient Excitations (SESAME). Hereinafter, some "best practices" from recent Italian and International experiences of seismic hazard estimation and microzonation studies are reported in order to put forward two proposals: (a) to formulate site-specific GMPEs in near-field areas in terms of PGA and (b) to record microtremor measurements following accurately the SESAME advice in order to get robust and repeatable HVSR values and to limit their use to those geological contests that are actually horizontally layered.

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Section: Background On Seismic Hazard Assessmentmentioning

confidence: 99%

Section: Background On Seismic Hazard Assessmentmentioning

confidence: 99%

Lessons from April 6, 2009 L’Aquila earthquake to enhance microzoning studies in near-field urban areas

Vessia

Rainone

Santis

et al. 2020

Geoenviron Disasters

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“…However, the scientific literature only provides extremely low-resolution information based on the estimates of liquefaction probability at the Italian [31] and European [20] scale, and no regional scale assessment of liquefaction potential exists for the study area. In addition, as it regards liquefaction damage potential, only local-scale information is available from the investigation of a coastal town located just to the of the study area [32].…”

Section: Introductionmentioning

confidence: 99%

Regional-Scale Seismic Liquefaction Susceptibility Mapping via an Empirical Approach Validated by Site-Specific Analyses

Zumpano¹,

Pisano²,

Filice³

et al. 2022

Geosciences

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Regional-scale analyses of susceptibility to liquefaction are seldom performed in data-scarce areas. However, in spite of data limitations, such efforts can still provide useful information in case of populated, seismically active regions. The present work focuses on susceptibility zonation for soil liquefaction that might occur due to ground shaking in the Foggia Province, a data-scarce, seismically active area of about 7000 km2 located in southern Italy. The Analytical Hierarchy Process (AHP) approach is used to obtain the susceptibility to liquefaction map of the whole area, while a geological and geotechnical database including 531 boreholes from 84 localities is used for cross-validation. The data are processed by means of a simplified quantitative method to determine liquefaction potential and assess whether a specific area is prone to liquefaction or not. Our results, along with an AUC − ROC = 0.89 test value, indicate that there are widespread areas of medium to high and very high susceptibility, and that the most susceptible zones are localized along the Adriatic Sea coastline and watercourses. The final susceptibility to liquefaction map represents a step forward towards the assessment of secondary seismic hazard in the study area, thus supporting the regional and local administrations responsible for land-use planning and risk mitigation.

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The Effects of Vertical Stress on the Liquefaction Potential Originated from Buildings in The Urban Areas

Özçelik

2020

Sustainable Infrastructure

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Main purpose of this paper is to study the influence of vertical stress on soil liquefaction in urban areas. The literature provides limited information on vertical stress analysis of multiple footings, and, as a result, there is no accurate way to account for the effect of the foundation depth on liquefaction. Additionally, practical methods do not exist for considering the interaction between the neighboring foundations vertical stress and seismic forces in the urban area. Vertical stress distribution was calculated in examining the soil liquefaction potential exhibited by building foundations as a case study. The vertical stresses were chosen randomly for some buildings with foundation depths of 3.00 m; 4.50 and 6.00 m at the Burkent site (Burdur-Turkey). The influence of 5-storey buildings on the liquefaction potential of sandy soils was evaluated in terms of the safety factor (FS) against liquefaction along soil profile depths for different earthquakes. Standard Penetration Test (SPT) results were used based on simplified empirical procedure.

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Liquefaction damage potential for seismic hazard evaluation in urbanized areas

Cited by 4 publications

References 12 publications

Lessons from April 6, 2009 L’Aquila earthquake to enhance microzoning studies in near-field urban areas

Lessons from April 6, 2009 L’Aquila earthquake to enhance microzoning studies in near-field urban areas

Regional-Scale Seismic Liquefaction Susceptibility Mapping via an Empirical Approach Validated by Site-Specific Analyses

The Effects of Vertical Stress on the Liquefaction Potential Originated from Buildings in The Urban Areas

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