Seismic Site Response Analyses of Bay of Campeche Clay Using Predicted Dynamics Soil Properties

Taboada, Victor M.; Lopez, Francisco Alonso Flores; Dantal, Vishal; Roque, Diego Cruz; Nabor, Procoro Barrera

doi:10.4043/27541-ms

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…The discrepancies in damping ratio between the damping ratio curve developed in the present study for the Bay of Campeche clay and Darendeli (2001) curve can produce large differences when they are used to perform earthquake response analyses, as observed by Taboada, et al, (2017b) giving lower amplification of accelerations that are unconservative for the case when the Darendeli (2011) damping curve is utilized.…”

Section: Comparison With Previously Published Models For Claysmentioning

confidence: 82%

“…The equations developed to calculate VS, and the curves of G/Gmax- and D- of Bay of Campeche clays are recommended for preliminary or perhaps even final seismic site response evaluations. It has been shown that they can be used in practice to perform earthquake response analysis in the Bay of Campeche and determine the design acceleration spectrum at the depth of maximum soil-pile interaction (Taboada, et al, 2017b;Taboada, et al, 2022).…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

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Dynamic Properties of Clay for Earthquake Response Analysis in the Bay of Campeche

Urtuzuástegui¹,

Cao²,

Roque³

et al. 2022

RIS

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The Bay of Campeche is located in a region of moderate to high seismic activity related to the active triple junction between the North American, Caribbean, and Cocos plate boundaries. Therefore, the fixed offshore platforms and subsea structures in the Bay of Campeche must be designed against earthquake loading. A database was developed of classification and index properties tests, in situ measurements of shear wave velocity using downhole P-S suspension seismic velocity logging, in situ piezocone penetration tests, resonant column tests to characterize the shear modulus and material damping ratio at small shear strains (10−5 % to about 0.1 %), and strain-controlled cyclic direct simple shear tests to evaluate the decrease of shear modulus and the increase of material damping ratio at large shear strains (0.1 % to about 10 %) performed on clays from the Bay of Campeche, including clays with no carbonate content to 100 % carbonate content, retrieved from the seafloor to a penetration depth of 120 m below seafloor. The database was tailored specifically to develop empirical correlations for the Bay of Campeche clay to determine Vs when in situ measurements of Vs are not available and to develop numerical modeling to predict the variation of the normalized shear modulus (G/Gmax) and material damping ratio as a function of shear strains (g) when dynamic test results are unavailable for all the clay layers. The equations developed to calculate Vs and the curves of G/Gmax-g and D-g of Bay of Campeche clays are recommended for preliminary or perhaps even final seismic site response evaluations.

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Section: Comparison With Previously Published Models For Claysmentioning

confidence: 82%

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Dynamic Properties of Clay for Earthquake Response Analysis in the Bay of Campeche

Urtuzuástegui¹,

Cao²,

Roque³

et al. 2022

RIS

View full text Add to dashboard Cite

show abstract

Using Predicted Dynamic Properties to Perform Seismic Site Response Analyses on a Bay of Campeche Calcareous Soil Deposit

Taboada

Cao

Roque

et al. 2022

Day 1 Mon, May 02, 2022

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This study presents the influence of using predicted (calculated) normalized shear modulus (G/Gmax) and material damping ratio (D) curves on the design acceleration spectrum at the depth of maximum soil–pile interaction of a calcareous soil deposit in the Bay of Campeche.When comparing the predicted curves to the laboratory curves, it is concluded that due to limitations in the predicting models, the minimum confining pressure (σ’m) that must be used to get a good match with the laboratory curves is 150 kPa. After performing site response analyses for three shear wave velocity profiles and eight recorded acceleration time histories, the design acceleration spectrum was developed based on the envelope of the 24 calculated acceleration spectra. The acceleration amplitudes of the design spectrum in the short period range are slightly larger using the calculated curves than the laboratory curves. For periods longer than 0.27 seconds, the acceleration amplitudes of the design acceleration spectra are identical for practical purposes when both calculated and laboratory curves are used. Therefore, it is recommened to use the equations presented herein to calculate the curves of G/Gmax and D for calcareous soils in practice for preliminary and final seismic site response analyses. They can be especially useful in final evaluations of large or critical projects to calculate the curves when time and cost constraints make it impractical to perform direct experimental determinations of G/Gmax and D curves for each soil layer encountered in the soil deposit.

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Seismic Site Response Analyses of Bay of Campeche Clay Using Predicted Dynamics Soil Properties

Cited by 2 publications

References 5 publications

Dynamic Properties of Clay for Earthquake Response Analysis in the Bay of Campeche

Dynamic Properties of Clay for Earthquake Response Analysis in the Bay of Campeche

Using Predicted Dynamic Properties to Perform Seismic Site Response Analyses on a Bay of Campeche Calcareous Soil Deposit

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