NAOUI Tallah

Lahmar Bouthaina , Benhadad Sameh

Évaluation numérique des effets d'une surcharge en bande sur les pressions actives et passives d'un mur de soutènement rigide

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

In this paper, the effects of prestressing geosynthetic reinforcement on settlement reduction in embankments overlying locally weak zones are investigated through numerical analyses using the PLAXIS finite element code. The selected case study focuses on the reinforcement of a road embankment spanning approximately 11 km across soft sabkha soils in the Chott El Hodna region of Algeria. The construction site presents significant challenges due to the presence of locally weak zones with very low bearing capacity and liquid consistency, making them unsuitable for supporting road embankments without the risk of excessive differential settlements. The study examines the influence of key parameters, including the strength of the underlying weak zones, the magnitude of the 2025prestressing force, and the tensile stiffness of the geosynthetic reinforcement. Numerical results indicate that incorporating prestressed geosynthetics significantly improves the settlement response of the embankment, particularly in areas overlying locally weak zones. This technique enhances load distribution, minimizes localized pressure on weak zones, and mitigates the risk of excessive differential settlements.

Citation

Naoui TALLAH , Fouad Berrabah , , (2025-01-08), Effect of prestressed geosynthetic-reinforced embankment over locally weak sabkha zone by numerical approach, Studies in Engineering and Exact Sciences, Vol:6, Issue:1, pages:1-24, Studies Publicações

Cette étude évalue l'efficacité des déchets céramiques dans la stabilisation des sols collapsibles. Le matériau étudié est composé de 80% de sable de Boussaâda et 20% de kaolin de Djebel Debbagh. Des échantillons sont préparés avec différentes teneurs en eau (2%, 4%, 6%), énergies de compactage (20, 40, 60 coups), et pourcentages de déchets céramiques finement broyés (4%, 6%, 8%). Le potentiel d'effondrement est évalué par des essais œdométriques. Les résultats démontrent une réduction significative du potentiel d'effondrement après traitement, indiquant une amélioration notable de la stabilité du sol. Cette méthode de stabilisation pourrait s'avérer particulièrement pertinente pour les régions arides et semi-arides, offrant une solution durable pour la valorisation des déchets céramiques et l'amélioration des propriétés géotechniques des sols collapsibles

Citation

Naoui TALLAH , HAMZA Boussahel , NASSIMA Bakir , ,(2024-12-17), CARACTÉRISATION ET TRAITEMENT DES SOLS COLLAPSIBLES DANS LES ZONES ARIDES ET SEMIARIDES À L'AIDE DE DÉCHETS CÉRAMIQUES : UNE ÉTUDE EXPÉRIMENTAL,Le Premier Congrès National sur le Génie Civil et le Logement de Constantine (N2CEHC 2024),Constantine

This study focuses on the effect of soil-structure interaction on the dynamic behavior of structures subjected to seismic movements. A 2D model of a simple minaret, 18.4 meters tall with a width and length of 3.5 meters, was analyzed using the SAP2000 V21 finite element software. Two types of seismic loading were applied: the response spectrum of Algerian seismic regulations (RPA 99 version 2003) for low seismicity (zone: Z1), and accelerograms measured at the Keddara site in Boumerdès, Algeria, in 2003. The soil foundation is classified as type S3 (loose soil), and the analysis included conditions both with and without soil-structure interaction. The results indicate significant impacts of soil-structure interaction: the inclusion of soil effects led to a 25% reduction in base shear and a 15% increase in the fundamental period of the structure compared to the reference model without soil interaction. Additionally, nodal horizontal displacements at the top of the building increased by 40% when accounting for soil-structure interaction, affecting the overall stability and design considerations. This study underscores the importance of incorporating soil-structure interaction in the design process, as neglecting these effects could lead to underestimating the seismic demand and potentially compromise structural integrity.

Citation

Naoui TALLAH , Fouad Berrabah , Abderrachid BOULAOUAD , , (2024-12-15), DYNAMIC MODELING OF SOIL-STRUCTURE INTERACTION FOR SEISMIC PERFORMANCE EVALUATION OF REINFORCED CONCRETE BUILDING, JOURNAL OF APPLIED ENGINEERING SCIENCES, Vol:14, Issue:2, pages:348-353, Sciendro

Passive and active earth pressure on a vertical retaining wall are key parameters in geotechnical design. In this numerical study, the finite element method with OptumG2 software adopting the upper limit of limit analysis approach is used to evaluate the active (Pa) and passive (Pp) pressure under the effect of a strip surcharge behind the wall. The influence of surcharge position and intensity, soil friction angle and interface friction are analyzed. The results show an increase in (Pa) and (Pp) with surcharge intensity. Comparison with analytical solutions validates the method. The geometric and mechanical parameters studied have a significant effect on pressure. This study provides a numerical estimate of pressure in the presence of a strip surcharge for the design of retaining walls.

Citation

Naoui TALLAH , NASSIMA Bakir , ,(2024-12-09), Limit finite element analysis of active and passive earth pressure under the effect of a strip surcharge,The First International Conference on Civil Engineering and Materials Innovation, 1st ICCEMI’24,Mascara

This work explores the characterization and treatment of collapsible soils using ceramic waste and lime. The materials used include sand from Boussaâda, kaolin from Djebel Debbagh, and finely ground ceramic waste. Soil samples, composed of 80% sand and 20% kaolin, are moistened (2%, 4%, 6%), compacted (20, 40, 60 blows), and treated with 4%, 6%, and 8% ceramic waste. Oedometer tests are conducted to evaluate the collapse potential of treated soils. The results show a significant reduction in collapse potential, indicating improved soil stability. This treatment could be beneficial for arid and semi-arid areas.

Citation

Naoui TALLAH , HAMZA Boussahel , NASSIMA Bakir , ,(2024-12-09), Characterization and Treatment of Collapsible Soils in Arid and Semi-Arid Areas Using Ceramic Waste: An Experimental Study,The First International Conference on Civil Engineering and Materials Innovation, 1st ICCEMI’24,Mascara

Cette étude évalue l'efficacité des déchets céramiques dans la stabilisation des sols collapsibles. Le matériau étudié est composé de 80% de sable de Boussaâda et 20% de kaolin de Djebel Debbagh. Des échantillons sont préparés avec différentes teneurs en eau (2%, 4%, 6%), énergies de compactage (20, 40, 60 coups), et pourcentages de déchets céramiques finement broyés (4%, 6%, 8%). Le potentiel d'effondrement est évalué par des essais œdométriques. Les résultats démontrent une réduction significative du potentiel d'effondrement après traitement, indiquant une amélioration notable de la stabilité du sol. Cette méthode de stabilisation pourrait s'avérer particulièrement pertinente pour les régions arides et semi-arides, offrant une solution durable pour la valorisation des déchets céramiques et l'amélioration des propriétés géotechniques des sols collapsibles

Citation

HAMZA Boussahel , Naoui TALLAH , NASSIMA Bakir , ,(2024-10-30), CARACTÉRISATION ET TRAITEMENT DES SOLS COLLAPSIBLES DANS LES ZONES ARIDES ET SEMI-ARIDES À L'AIDE DE DÉCHETS CÉRAMIQUES : UNE ÉTUDE EXPÉRIMENTALE,Journées d’Etude de Génie Civil et Mécanique 2024 « JEGCM24 »,Msila

L'envasement des barrages constitue un défi majeur pour la gestion des ressources en eau, particulièrement dans les régions semi-arides comme l'Algérie, où le barrage de K’sob, situé au nord-est de M’sila, subit des pertes annuelles significatives de volume d'eau. Ce phénomène, causé par une érosion active, nécessite des opérations de dragage fréquentes, qui, bien que nécessaires, engendrent des coûts élevés et des impacts environnementaux préoccupants. Cette étude vise à caractériser les sédiments extraits du barrage de K’sob afin d'explorer leur potentiel de valorisation dans le domaine du génie civil. À travers des analyses physiques et mécaniques, les sédiments ont été classés selon le guide technique GTR (LCPC, SERTA, 2000) en classe A2, correspondant à des limons argileux peu plastiques. Ces caractéristiques indiquent que les sédiments peuvent être utilisés efficacement comme matériaux de remblai ou dans les couches d'assise des infrastructures routières.

Citation

HAMZA Boussahel , Naoui TALLAH , NASSIMA Bakir , ,(2024-10-30), ETUDE EXPERIMENTALE DE LA CARACTERISATION DE LA BOUE DE DRAGAGE DU BARRAGE K’SOB EN VUE DE SA VALORISATION DANS LES TRAVAUX ROUTIERS,Journées d’Etude de Génie Civil et Mécanique 2024 « JEGCM24 »,Msila

envasement des barrages constitue un défi majeur pour la gestion des ressources en eau, particulièrement dans les régions semi-arides comme l'Algérie, où le barrage de K’sob, situé au nord-est de M’sila, subit des pertes annuelles significatives de volume d'eau. Ce phénomène, causé par une érosion actif, nécessite des opérations de dragage fréquentes, qui, bien que nécessaires, engendrent des coûts élevés et des impacts environnementaux Préoccupants. Cette étude vise à caractériser les sédiments extraits du barrage de K’sob afin d'explorer leur potentiel de valorisation dans le domaine du génie civil. À travers des analyses physiques et mécaniques, les sédiments ont été classés. selon le guide technique GTR (LCPC, SERTA, 2000) en classe A2, correspondant à des limons argileux peu plastiques. Ces caractéristiques indiquent que les sédiments peuvent être utilisés efficacement comme matériaux de remblai ou dans les couches d'assise des infrastructures routières.

Citation

NASSIMA Bakir , Naoui TALLAH , HAMZA Boussahel , Seif Eddine KHADRAOUI , Meriem SELMI , ,(2024-10-30), ETUDE EXPERIMENTALE DE LA CARACTERISATION DE LA BOUE DE DRAGAGE DU BARRAGE K’SOB EN VUE DE SA VALORISATION DANS LES TRAVAUX ROUTIERS,Journées d’Etude de Génie Civil et Mécanique 2024 « JEGCM24 »,Université de M’sila

This article presents a study on earth bricks (adobe) used in ancient earth constructions in the region of Boussaâda, located in the southeast of northern Algeria. The objective is to evaluate the physical and mechanical properties, including compressive and shear strength, as well as the thermal characteristics of these bricks, with the aim of promoting their use on a large scale. The results of the physical and identification analyses showed that the bricks studied are silty sands. The compression tests gave an average compressive strength of 0.2 MPa. The shear tests gave an average cohesion of 172.22 kPa and an average internal friction angle of 63.92°. The average thermal conductivity is 0.7291 W/m.K. The results obtained show that Boussaâda earth bricks have satisfactory physical and mechanical characteristics. The compressive strength is low, but it is sufficient for the construction of one or two storey buildings. Cohesion and internal friction angle are satisfactory for the stability of brick walls. The thermal conductivity is low, which makes Boussaâda earth bricks good thermal insulators. The results obtained reveal that the composition of these adobes can be used to make quality bricks.

Citation

Naoui TALLAH , Ammar Geuttouche guettouche.amar@gmail.com, , (2024-06-30), Characterization Study of the Earth Bricks Used in the Old Constructions of the Boussaâda Area, Annales de Chimie - Science des Matériaux, Vol:48, Issue:3, pages:323-329, IIETA

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 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, ,(2018-12-31), Sand-Steel Interface Behavior Under Cyclic Loading,Recent Advances in Geo-Environmental Engineering, Geomechanics and Geotechnics, and Geohazards,Hammamet, Tunisia

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 , Bencheikh Boubakeur, , (2018-02-08), Experimental and numerical modeling of the sand–steel interface behavior under monotonic loading, Innovative Infrastructure Solutions, Vol:3, Issue:25, pages:1-10, Springer Nature

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