NAOUI Tallah

ABDELMOULA ALA , ABDERAZZAK HAMZA

Analyse limite de la poussée active des terres sur murs de soutènement rigides avec console sous surcharges statique partiellement repartie

MANSOR RACHID , HAMRIT AYA, ABDELMOULA ALA

Utilisation des colonnes ballast avec du sable pour le renforcement des sols de faible capacité : une approche novatrice

Djawhara Hamouma

Modélisation non-linéaire de l’interaction sol-pieu￾structure sous chargement cyclique

Salah Khalil , Gouliliz Abdelhak

Etude de l’interaction dynamique sol-structure (application au cas d’un Minaret en 3D sous séisme

Abdelkabir Radhia

Etude de l’interaction dynamique sol- structure (application cas d’une Minaret sous séisme en 3D )

Khouloufi Mohamed

Etude de l’interaction dynamique sol-structure (application cas d’une Minaret sous séisme)

KHELIFI Amdjed , BENCHORA Djamel

Comportement des briques de terre utilisées dans la construction en terre dans la zone de Boussaâda sous chargements monotone et cyclique

SAADAOUI benaceur , OUAHAB Yamina

Caractérisation des briques en Terre utilisées dans les anciennes construction dans la zone de Bou-saâda

ZEYNEB, BEN BRAHIM

Etude d'interface "sol-structure" sous chargement monotone.

Loglaithi Boubaker

Comportement d’un remblai de grande hauteur renforcé par des armatures métalliques

Magoura Nadjib

Comportement d’un écran de soutènement renforcé par des armatures métalliques

Yahia Bochra

Simulation de l'interaction sol-structure

Cette étude se penche sur l'analyse de la poussée active des terres exercée sur des murs de soutènement rigides dotés de consoles en réponse à des surcharges par-tiellement réparties. Étant donné l'utilisation fréquente de ces structures pour sta-biliser des terrains en pente et ériger des murs de soutènement dans des zones ur-baines denses, cette recherche revêt une importance majeure. Les précédentes études ont largement exploré les murs de soutènement, mais peu se sont attardées sur l'interaction complexe entre les surcharges partielles et la poussée active des terres, ce qui motive cette recherche Nous utilisons la méthode d'analyse limite à l'aide du logiciel Optum G2 V21, ba-sé sur la méthode des éléments finis, pour étudier en détail la poussée active des terres. Notre étude se concentre sur un mur de soutènement rigide d'une hauteur de 10 mètres. Des surcharges uniformément réparties de largeurs variables sont appliquées à différentes distances a du mur. Trois positions distinctes de la con-sole sont examinées, avec une longueur fixe de 1,5 mètre. Nos résultats préliminaires révèlent une influence significative de la position de la surcharge sur la poussée active des terres. Cette influence diminue lorsque la sur-charge est positionnée à une distance équivalente à la hauteur du mur. En ce qui concerne la position de la console, nos conclusions indiquent qu'une console po-sitionnée à mi-hauteur du mur peut considérablement réduire la valeur de la pous-sée active. Ces résultats suggèrent que la position de la surcharge et de la console joue un rôle crucial dans le comportement de la poussée active des terres sur les murs de soutènement rigides. Lorsque la surcharge est à une distance appropriée du mur, la console peut effectivement atténuer la poussée active. Cette recherche contribue à une meilleure compréhension de la manière dont les surcharges partielles et les positions des consoles influencent la poussée active des terres sur les murs de soutènement.

Citation

Naoui TALLAH , ,(2023-12-11), Analyse limite de la poussée active des terres sur murs de soutènement rigides avec console sous surcharges statique partiellement repartie,Premier séminaire national de Géotechnique, Construction, Matériaux & Environnement  GEOMAT 2023         ,Souk Ahras - ALGERIE

This study focuses on the soil-structure interaction effect on the dynamic behaviour of structures subjected to seismic motions. A 2D model of a simple minaret with a height of 18.4 meters and a width and length of 3.5 meters was considered using the finite element software SAP2000 V21. Two types of seismic loading were proposed: the response spectrum of the Algerian seismic regulation (RPA 99 version 2003) for low seismicity (zone: Z1), and accelerograms measured in 2003 on the site of Keddara in Boumerdès, Algeria. The soil foundation of a S3 loose soil type, and the foundation is chosen according to two conditions: without soil-structure interaction and with soil-structure interaction. The comparisons were made considering loads (normal force N, shear force T, bending moment M) and the nodal horizontal displacements of each floor as a function of the height of the building. This study concludes that the soil-structure interaction has a significant impact on both the stability and on the economic aspect of structures, and should not be overlooked in their design

Citation

Naoui TALLAH , ,(2023-11-15), Study of dynamic soil-structure interaction: case of a concrete building under earthquake loading,Third International Civil Engineering Seminar of Bechar 2023,Bechar Algerie

Recent studies of retaining walls include experimental studies, numerical analysis and analytical models. Although active earth pressure against retaining structures has received much attention, the evaluation of active earth pressure of backfill when loaded by a strip foundation, has been slightly studied. This paper studies the effect of a strip load on the active pressure force and the distribution of the horizontal stresses on a rigid wall, using a finite element limit analysis. The strip loading is located at different distances from the vertical face of the wall. The OptumG2 code is used to analyze the effect of width of strip surcharge (soil-wall), interface friction angle and soil internal friction angle. New interesting results are demonstrated and presented here: the dependency of the active earth pressure coefficient on both position and width of the strip load, in one hand, and the effect of the internal friction angle of the soil, the soil-wall interface, and the position of the strip loading on the failure mechanism, in the other hand.

Citation

Naoui TALLAH , Abderrachid BOULAOUAD , , (2022), Limit Analyses of the Active Earth Pressure on Rigid Retaining Walls under Strip Loading on Backfills, Annales de Chimie - Science des Matériaux, Vol:16, Issue:3, pages:27-35, Lavoisier

Unlike other traditional materials; cement, concrete, wood and steel, earth in its natural state can be used in construction without much energy expenditure. It also has many environmental, social, cultural and economic advantages. It also has good thermal insulation performance once stabilized under ideal conditions. This work, which focuses on the study of earth bricks used in the old earthen constructions of the Boussaâda area in the south-east of northern Algeria, aims to assess the physical and mechanical characteristics in compression and shear as well as the thermal characteristics of these bricks, with a view to popularizing their use on a large scale. The synthesis of the results of the physical and identification characteristics shows that the adobes taken are Loamy Sand (SL), according to the LPC classification. All bricks were tested for compression as well as box shear. The results obtained give a compressive strength of 0.2 MPa. However, the cohesion and internal friction angle (C, Ф) are 172.22kPa and 63.92° respectively. The average value of thermal conductivity is 0.7291 W/m.K, which corresponds to the right thermal insulator. The results obtained reveal that the composition of these adobes can be used for the manufacture of quality bricks.

Citation

Naoui TALLAH , Naoui TALLAH , ,(2022), Etude de caractérisation des briques de terre utilisées dans les anciennes constructions de la zone de Boussaâda,First International Conference on Materials Science & Technology MatScience-2022,KHENCHELA - ALGERIA

Unlike other traditional materials; cement, concrete, wood and steel, earth in its natural state can be used in construction without much energy expenditure. It also has many environmental, social, cultural and economic advantages. It also has good thermal insulation performance once stabilized under ideal conditions. This work, which focuses on the study of earth bricks used in the old earthen constructions of the Boussaâda area in the south-east of northern Algeria, aims to assess the physical and mechanical characteristics in compression and shear as well as the thermal characteristics of these bricks, with a view to popularizing their use on a large scale. The synthesis of the results of the physical and identification characteristics shows that the adobes taken are Loamy Sand (SL), according to the LPC classification. All bricks were tested for compression as well as box shear. The results obtained give a compressive strength of 0.2 MPa. However, the cohesion and internal friction angle (C, Ф) are 172.22kPa and 63.92° respectively. The average value of thermal conductivity is 0.7291 W/m.K, which corresponds to the right thermal insulator. The results obtained reveal that the composition of these adobes can be used for the manufacture of quality bricks.

Citation

Naoui TALLAH , Naoui TALLAH , ,(2022), Etude de caractérisation des briques de terre utilisées dans les anciennes constructions de la zone de Boussaâda,First International Conference on Materials Science & Technology MatScience-2022,KHENCHELA - ALGERIA

The bearing capacity of circular pile has been widely treated considering the soil as a homogeneous material. While the soil properties change randomly, which pushed us to use probabilistic analysis. This study presents an evaluation of the undrained bearing capacity of circular pile under lateral loading, assuming that the cohesion of the soil is random variable. A finite element limit analysis, OptumG2, is used in this study. It is found that the increase of coefficient of variation CovSu, decreases the bearing capacity factor of pile Np, in which the effect of increasing adhesion factor becomes less as CovSu increases.

Citation

Naoui TALLAH , , (2021), Probabilistic Analysis of lateral bearing capacity of pile-soil System, International Journal of Geotechnical Engineering, Vol:16, Issue:5, pages:525-531, Taylor & Francis

L’article présente une analyse numérique par la méthode des éléments finis FEM d’un modèle physique réduit en chambre d’étalonnage sur un modèle instrumenté de pieu isolé installé dans le sable de fontainebleau, en utilisant le logiciel Plaxis 2D.V8.6. L’études ’intéresse à la réponse de pieu, en particulier la dégradation du contrainte au niveau de l’interface sol-pieu et leur évolution avec l’augmentation d’un chargement cyclique. Les résultats de la simulation numérique du modèle de pieu isolé en chambre d’étalonnage sous chargement cyclique par logicielle Plaxis indique qu’au début de chargement, la contrainte de cisaillement extrême augmente. Cependant, la contrainte de cisaillement diminue avec l’augmentation du nombre cycles (300 cycles).

Citation

Naoui TALLAH , Hamouma. Dj Université de Biskra, Messameh. A Université de Biskra, ,(2020), Analyse numérique d’un modèle physique réduit de pieu sous chargement cyclique,CAM 2019 Congrès Algérien de Mécanique Fevrier 23—26, 2020 • Ghardaia, Algérie,Ghardaia, Algérie

The behavior of circular pile has been widely treated considering the loading as amonotonic loading. In practise, the type of the load is varies according to many factors,which pushed us to use cyclic loading. The purpose of this article is to analyze thebehavior of the soil-pile interface in calibration chamber under cyclic loading. A finiteelement analysis, through Plaxis 2D code, is used to realize this study. This paper dealswith a new evaluation of the pile response, by taking into account the different pile–soiladhesions. It is found at the level of the friction sleeve that, the shear stress increaseswhen the pile–soil adhesions increases. Further, the lateral friction stress is much moreinfluenced by the friction sleeve roughness.

Citation

Naoui TALLAH , , (2020), FINITE ELEMENT ANALYSIS OF SOIL-PILE INTERFACE UNDER CYCLIC LOADING, International Journal of Civil Engineering and Technology, Vol:11, Issue:10, pages:49-57, IAEME Publication

This paper is to investigate the behavior of sand-steel interfaces under cyclic loading. A series of direct shear test results performed on a dune sand in contact with a stainless steel rigid plate, as well as those of a numerical simulation carried out using the Plaxis-2D (version 8.2) software were presented and discussed. The cyclic shear experimental and numerical curves are fairly well concordant. These curves make it possible to conclude that the sand-steel interface cyclic shear modulus and the corresponding damping ratio were influenced by the sand compactness and the steel plate roughness. The results also show that the rough plate is more effective than the smooth one mainly when it is in contact with a dense sand than with loose sand.

Citation

Mohammed KHEMISSA , Naoui TALLAH , ,(2019), Sand-Steel Interface Behavior Under Cyclic Loading: IEREK Interdisciplinary Series for Sustainable Development,Conference of the Arabian Journal of Geosciences,Sousse, Tunisia

Le comportement des remblais renforcés est un problème d'interaction sol-structure. Le procédé de renforcement à l’aide d’armatures métalliques, appelé "terre-armée", en est l’exemple type. Ce procédé est utilisé pour augmenter la stabilité de l’ouvrage et réduire les déformations qu’il peut subir sous l’action des charges monotones ou cycliques. Le mécanisme de fonctionnement du matériau "terre-armée" est basé sur l’interaction entre le sol constituant le corps du remblai et les armatures métalliques utilisées pour son renforcement. Pour un sol de caractéristiques géotechniques données, cette interaction est mieux ressentie pour une armature rugueuse que pour une armature lisse de même type.

Citation

Naoui TALLAH , ,(2019), Effet de l’interaction sol-structure sur le comportement d’un remblai renforcé par des armatures métalliques,Rencontres Nationales de Génie Civil et d’Hydraulique. Skikda, les 13 et 14 novembre 2019,SKIKDA ALGERIE

L’article présente une analyse numérique d’un modèle physique réduit sur un pieu isolé installé dans le sable de fontainebleau, en utilisant le logiciel Plaxis 2D.V8.6. L’étude s’intéresse à la dégradation du contrainte de cisaillement au niveau de l’interface sol-pieu et leur évolution avec l’augmentation d’un chargement cyclique. Les résultats de la simulation numérique du modèle de pieu isolé sous chargement cyclique par logicielle Plaxis indique que la formation d’une zone de cisaillement au niveau du manchons de frottement est influence sur les boucles d’hystérésis du contrainte de cisaillement

Citation

Naoui TALLAH , Hamouma. Dj Universite de Biskra, Messameh. A Université de Biskra, ,(2019), Influence du chargement cyclique sur la contrainte de cisaillement au niveau de l’interface sol-pieu.,The 1st international congress on advances in geotechnical engineering and construction management (ICAGECM'19) 9th-10th December 2019 SKIKDA-ALGERIA,SKIKDA ALGERIE

Le comportement des remblais renforcés est un problème d'interaction sol-structure. Le procédé de renforcement à l’aide d’armatures métalliques, appelé "terre-armée", en est l’exemple type. Ce procédé est utilisé pour augmenter la stabilité de l’ouvrage et réduire les déformations qu’il peut subir sous l’action des charges monotones ou cycliques. Le mécanisme de fonctionnement du matériau "terre-armée" est basé sur l’interaction entre le sol constituant le corps du remblai et les armatures métalliques utilisées pour son renforcement. Pour un sol de caractéristiques géotechniques données, cette interaction est mieux ressentie pour une armature rugueuse que pour une armature lisse de même type.

Citation

Naoui TALLAH , Mohammed KHEMISSA , Saâd Aidjouli, ,(2019), Effet de l’interaction sol-structure sur le comportement d’un remblai renforcé par des armatures métalliques,Rencontres Nationales de Génie Civil et d’Hydraulique. Skikda, les 13 et 14 novembre 2019,Université de Skikda, Algérie

This paper presents and analyzes the experimental and numerical results of a series of direct shear tests performed under monotonic loading on a dune sand presenting two forms of compactness, one loose and the other dense, in contact with a rigid stainless steel plate presenting two forms of roughness, one smooth and the other rough. Experimental direct shear tests were performed using a shear box similar to Casagrande shear box. Calculations were carried out using two elastoplastic behavior models implemented into a finite elements computer program. Experimental and numerical results made it possible to determine the shear strength parameter characteristics of the sand–steel interface, and show a good agreement between the experimental and predicted data. In addition, for all considered normal stress levels, the rough interface is more advantageous than the smooth interface, and more true with dense sand than with loose sand of same type.

Citation

Mohammed KHEMISSA , Naoui TALLAH , Naoui TALLAH , , (2018), Experimental and numerical modeling of the sand-steel interface behavior under monotonic loading, Innovative Infrastructure solutions, Vol:3, Issue:25, pages:3:25, Springer

This paper presents and analyzes the experimental and numerical results of a series of direct shear tests performed under monotonic loading on a dune sand presenting two forms of compactness, one loose and the other dense, in contact with a rigid stainless steel plate presenting two forms of roughness, one smooth and the other rough. Experimental direct shear tests were performed using a shear box similar to Casagrande shear box. Calculations were carried out using two elastoplastic behavior models implemented into a finite elements computer program. Experimental and numerical results made it possible to determine the shear strength parameter characteristics of the sand–steel interface, and show a good agreement between the experimental and predicted data. In addition, for all considered normal stress levels, the rough interface is more advantageous than the smooth interface, and more true with dense sand than with loose sand of same type.

Citation

Mohammed KHEMISSA , Naoui TALLAH , Naoui TALLAH , , (2018), Experimental and numerical modeling of the sand-steel interface behavior under monotonic loading, Innovative Infrastructure solutions, Vol:3, Issue:25, pages:3:25, Springer

This paper is to investigate the behavior of sand-steel interfaces under cyclic loading. A series of direct shear test results performed on a dune sand in contact with a stainless steel rigid plate, as well as those of a numerical simulation carried out using the Plaxis-2D (version 8.2) software were presented and discussed. The cyclic shear experimental and numerical curves are fairly well concordant. These curves make it possible to conclude that the sand-steel interface cyclic shear modulus and the corresponding damping ratio were influenced by the sand compactness and the steel plate roughness. The results also show that the rough plate is more effective than the smooth one mainly when it is in contact with a dense sand than with loose sand.

Citation

Mohammed KHEMISSA , Naoui TALLAH , Djaâfar Barkat, ,(2018), Sand-steel interface behaviour under cyclic loading,1st Conference of the Arabian Journal of Geosciences (CAJG),Hammamet, Tunisia

This paper presents and analyzes the experimental and numerical results of a series of direct shear tests performed under monotonous loading on a dune sand, both loose and dense, in contact with a rigid steel plate, both smooth and rough. The direct shear tests were conducted by means of a modified Casagrande shear box. The calculations carried out using a finite elements computer program. Obtained results made it possible to determine the shear strength parameters characteristics of the sand-plate interface, and show a good agreement between experimental and predicted data. They show in addition that, for all considered levels of normal stress, the rough interface is more advantageous than the smooth interface, and more with a dense sand that with a loose sand of same type.

Citation

Naoui TALLAH , Mohammed KHEMISSA , ,(2016), Modelling of the Soil-Structure Interface Behavior by Direct Shear Tests under Monotonous Loading,12th International Congress on Advances in Civil Engineering (ACE2016),Istanbul Turky

This paper presents and analyzes the experimental and numerical results of a series of direct shear tests performed under monotonous loading on a dune sand, both loose and dense, in contact with a rigid steel plate, both smooth and rough. The direct shear tests were conducted by means of a modified Casagrande shear box. The calculations carried out using a finite elements computer program. Obtained results made it possible to determine the shear strength parameters characteristics of the sand-plate interface, and show a good agreement between experimental and predicted data. They show in addition that, for all considered levels of normal stress, the rough interface is more advantageous than the smooth interface, and more with a dense sand that with a loose sand of same type.

Citation

Naoui TALLAH , Mohammed KHEMISSA , ,(2016), Modelling of the soil-structure interface behavior by direct shear tests under monotonous loading,12th International Congress on Advances in Civil Engineering (ACE 2016), Bogazici University, 21-23 September 2016,Istanbul, Turkey

La résolution d'un problème d'intéraction sol-structure (pieux, ouvrages souterraines, terre armée ;...) nécessite la connaissance du comportement des interfaces. Ce travail constitue une contribution dans ce sens. Il est composé de deux parties. Dans la première partie, nous présentons les résultas des essais de cisaillement monotones sol-structure réalisés avec le sable de Bou-saâda à l'aide d'une boite de cisaillement direct modifié. Dans la deuxième partie, le modèle d'interface MODJOIN est validé sur les essais réalisés dans la première partie. Ce modèle comporte les principaux concepts utilisés dans la modélisation des sols (écrouissage, état critique, ….).Les tests de validation ont montré que le modèle décrit bien le comportement de l'interface sous chargement monotone.

Citation

Naoui TALLAH , B.Bencheikh, ,(2008), Modélisation expérimentale et numérique du comportement des interfaces sol-structure,International Conference on Numerical Computation in Geotechnical Engineering NUCGE'08,SKIKDA ALGERIE