Depth Reduction Factor Assessment for Evaluation of Cyclic Stress Ratio Based on Site Response Analysis

Farrokhzad, F.; Janalizadeh, A.

doi:10.1007/s11204-017-9465-1

Cited by 4 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, Filali and Sbartai [10], in their study, showed that the dynamic cyclic shear stress (CSRD) can in many cases be greater than the Simplified Shear Stress (CSR) according to the used earthquake. This result (rd>1) was found in the study conducted by Farrokhzad [11] for many sites at significant depth and in the work presented by Sun et al [12] at shallow depth for a few sites. Therefore, rd, can be greater than 1 (rd>1), in this case, this procedure cannot be considered as conservative, thus, the simplified procedure of Seed and Idriss [1] can't be applied because it's based on the assumption that rd<1, and all the modifications and improvements made in the literature are based on this assumption.…”

Section: Introductionsupporting

confidence: 74%

Liquefaction Analysis using Shear Wave Velocity

Filali¹,

Sbartai²

2020

Civ Eng J

View full text Add to dashboard Cite

The Andrus and Stokoe curves developed based on shear wave velocity case history databases, are the most widely used in the context of the Seed and Idriss simplified procedure as a deterministic model. Theses curves were developed from the database according to the calculate cyclic stress ratio (CSR) proposed by Seed and Idriss in 1971 with the assumption that the dynamic cyclic shear stress (τd) is always less than the simplified cyclic shear stress (τr) deduced by Seed and Idriss based on their simplifying hypotheses (rd= τd / τr <1). Filali and Sbartai in 2017, showed that rd can in many cases be greater than 1, and they have proposed a correction for the CSR in the range where rd >1. In this paper, we will present a probabilistic study based on the Bayesian method for the evaluation of the liquefaction potential of a soil deposit using a case history database based on shear wave velocity measurement. The result of this analysis shows that by using the corrected version of the simplified method, the boundary curve is moved to a new position. Then, the objective of this study is to present an adjusted mathematical model which characterizes the new position of the boundary curve (CRR) and a new formulation for computing the probability of liquefaction based on the probabilistic shape of the CRR curves using the corrected and the original version of the simplified method.

show abstract

Section: Introductionsupporting

confidence: 74%

Liquefaction Analysis using Shear Wave Velocity

Filali¹,

Sbartai²

2020

Civ Eng J

View full text Add to dashboard Cite

show abstract

“…Filali and Sbartai (2017) conducted the same analysis, but by submitting each site to many earthquakes (38 in their study) in order to show the influence of the variation of the input motions on r d profiles.Thus, Filali and Sbartai (2017), in their study, showed that the dynamic cyclic shear stress (CSRD) can, in many cases, be greater than the simplified shear stress (CSR) according to the used earthquake. Therefore, r d can be greater than 1;this result (r d >1) was found in the study conducted by Farrokhzad (2016) for many sites at a significant depth and in the worksreportedby Sun etal. (2020), Cetin and Seed (2004), and Dismuke (2014) at a shallow depth for a few sites.In this case, this procedure cannot be considered as conservative;thus, the simplified procedure of Seed and Idriss (1971) cannot be applied because itis based on the assumption that r d <1, and all the modifications and improvements made in the literature are based on this assumption.…”

Section: Introductionsupporting

confidence: 62%

Probabilistic Liquefaction Analysis Using Standard Penetration Test

Filali

Sbartai

2022

Studia Geotechnica Et Mechanica

View full text Add to dashboard Cite

The Youd etal liquefaction resistance curves developed in 2001 to characterize the cyclic resistance of soil based on SPT test are the most used in the context of the Seed and Idriss simplified procedure as a deterministic model. These curves were developed from a modified database of Seed etal. in 1985 with the assumption that the actual peak shear stress (τd) induced at depth h is always less than that predicted by the simplified procedure (τr) of Seed and Idriss (rd= τd/τr<1). By using a suite of equivalent linear site response analyses to adjust the dynamic and the simplified shear stress at depth h, Filali and Sbartai showed in 2017 that the dynamic peak shear stress for some earthquakes is greater than the simplified peak shear stress (rd>1). As in this case, the assumption of the simplified procedure is not verified, Filali and Sbartai have proposed a corrector factor (RC) in the range where rd >1 to adjust the deformable and rigid body. In this paper, we will present a probabilistic study for the evaluation of the liquefaction potential using a database based on SPT measurement compiled after the Chi-Chi Taiwan earthquake, in which the cyclic stress ratio is evaluated using the proposed corrector factor. The objective of this study is to present a probabilistic shape of the cyclic resistance ratio (CRR) curves based on the original simplified method of Seed and Idriss and the corrected version and a new formulation for computing the probability of liquefaction.

show abstract

Effects of Uncertainty of Dynamic Shear Modulus Ratio on Design Ground Motion

Yang

et al. 2019

Soil Mech Found Eng

View full text Add to dashboard Cite

Depth Reduction Factor Assessment for Evaluation of Cyclic Stress Ratio Based on Site Response Analysis

Cited by 4 publications

References 19 publications

Liquefaction Analysis using Shear Wave Velocity

Liquefaction Analysis using Shear Wave Velocity

Probabilistic Liquefaction Analysis Using Standard Penetration Test

Effects of Uncertainty of Dynamic Shear Modulus Ratio on Design Ground Motion

Contact Info

Product

Resources

About