Validation and Verification of Semi-Empirical Methods for Evaluating Liquefaction Using Finite Element Method

Touijrate, Soukaina; Baba, Koji; Ahatri, Mohamed; Bahi, Lahcen

doi:10.1051/matecconf/201814902028

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Nowadays, several semi-empirical methods are used to quantify and evaluate the potential of liquefaction [1][2]. This potential reflects the ability of soil to withstand cyclic shear forces and depends mainly on the relative density, grain size, soil texture, degree of saturation and magnitude of the earthquake.…”

Section: Semi-empirical Methods Used In the Evaluationmentioning

confidence: 99%

Semi-Empirical Method for evaluating Risk of Liquefaction during earthquakes a Study Case of Rhiss Dam

et al. 2020

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Liquefaction is a hazardous and temporary phenomenon by which water saturated soil loses some or all of its resistance. The undrained conditions linked to the cyclic load increase the pores water pressure inside the soil and consequently reduce effective stress. As a result, the soil can no longer resist or hold the shear forces, and lead to enormous deformations that directly influence the stability of structures and infrastructures foundations. Since 1964, several semi-empirical methods have been invented to evaluate the liquefaction potential using the in-situ test results. This study is based on the correlation between experimental data results of Menard pressuremeter and SPT dynamic penetrometer tests. Samples used in this test come from the Rhiss dam located in the North of Morocco, 24 kilometers as the crow flies from the town of Al Hoceima and south of the foundations of a calcareous ridge. The studied area have high seismic activity and a high percentage of fine soil elements, which suggests the possibility of soil liquefaction. We present and discuss the results of applying Idriss and Boulanger, and Youd et al methods in the evaluation of liquefaction susceptibility.

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Section: Semi-empirical Methods Used In the Evaluationmentioning

confidence: 99%

Semi-Empirical Method for evaluating Risk of Liquefaction during earthquakes a Study Case of Rhiss Dam

et al. 2020

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“… In most cases, the ground motion at the building's base is assumed to be the same as that of the free field, and this approximation is usually deemed acceptable [19,20].…”

Section: Introductionmentioning

confidence: 99%

Optimal Bracing Type of Reinforced Concrete Buildings with Soil-Structure Interaction Taken into Consideration

et al. 2023

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This study aims to investigate the impact of soil-structure interaction (SSI) on the seismic behavior of reinforced concrete buildings. An advanced numerical model for SSI was developed and verified using ABAQUS software. The seismic response of a 12-story building on four types of soil (rock, dense soil, stiff soil, and soft soil) was examined using a Normalized Response Spectra based on the Moroccan paraseismic regulation RPS 2011. The global lateral displacement, inter-story drift, and period were compared for two types of bracing (column and shear wall). The results show that SSI has a significant impact on the seismic behavior of buildings, and the seismic responses of soil-structure systems with column and shear wall bracing are quite different. The research contributions of this paper include developing an advanced numerical model for SSI, examining the impact of SSI on the choice of bracing for reinforced concrete buildings, and providing guidance on the most reliable bracing method for structures of various heights and soil types. The study's findings have important implications for seismic design and can help improve the safety and reliability of buildings in earthquake-prone regions. The study also highlights the importance of considering SSI in seismic design and the need for guidelines that describe the bracing systems to be used based on the structure's height and type of soil. Doi: 10.28991/CEJ-2023-09-06-06 Full Text: PDF

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“…These methods are organized into three main families, namely, the cyclic deformation approach [4,5], the energy approach [6] and the cyclic stress approach [7][8][9][10][11]. The study is based predominantly on the most developed and practically used approach, i.e., the cyclic strain approach, seen as the estimation of the ratio of cyclic strain to cyclic resistance [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Liquefaction Potential based on Cone Penetration Test (CPT) and Semi-empirical Methods

et al. 2023

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The phenomenon of soil liquefaction can be an induced effect of earthquake shaking where the saturated soil loses some or all of its bearing capacity and stiffness. Likewise, the increase of water pressure in the soil pores under the seismic wave causes a decrease of the shear strength. As a result, the soil becomes liquefied and susceptible to producing permanent deformations. The phenomenon of liquefaction is generally unpredictable, and neglecting it can influence the stability of structures and infrastructure foundations. Since the 1964 Alaska and Niigata earthquakes, more research works have been conducted to assess land liquefaction vulnerability. This study is undertaken in this field, whose objective, on the one hand, is to signal the phenomenon of liquefaction in the north of Morocco as a geo-technical part known for its instability and, on the other hand, to study the semi-empirical methods to adequately evaluate the liquefaction potential while specifying the most appropriate method for our case study. Similarly, the study is based on data derived from experimental results of in-situ tests applied to the embankment crossing the valley of "Oued Gharifa" on a high-speed rail line section from KP 228+400 to KP 229+375. Moreover, this research aims to show and discuss the evaluation of liquefaction potential of the experimental results of the CPT (cone penetration test) using three semi-empirical methods, namely the Juang method, the Olsen method, and the Robertson method. In doing so, we are going to compare the application results of the three semi-empirical methods in light of evaluating the liquefaction likelihood of the studied area, taking into account the nature of the soil, the variation of the safety coefficient, and the liquefaction potential for each method as well. Doi: 10.28991/CEJ-2023-09-02-013 Full Text: PDF

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Validation and Verification of Semi-Empirical Methods for Evaluating Liquefaction Using Finite Element Method

Cited by 4 publications

References 9 publications

Semi-Empirical Method for evaluating Risk of Liquefaction during earthquakes a Study Case of Rhiss Dam

Semi-Empirical Method for evaluating Risk of Liquefaction during earthquakes a Study Case of Rhiss Dam

Optimal Bracing Type of Reinforced Concrete Buildings with Soil-Structure Interaction Taken into Consideration

Evaluation of Liquefaction Potential based on Cone Penetration Test (CPT) and Semi-empirical Methods

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