Pub Date : 2021-12-01DOI: 10.2478/sspjce-2021-0014
Soufiane Boukarta
Abstract This paper explores the impact of balconies on the energy demand required for cooling in the arid climate zone of the city of Adrar, in Algeria. For the purpose to assess several situations of the balconies, we have chosen a parametric method based on a campaign of thermal simulations. The open and eliminated balcony type were selected and characterized by four parameters: the balcony to room ratio, the orientation, the window type, and the balcony position. A set of 100 simulations was selected randomly based on the Monte-Carlo probability technique. The final sample was corrected based on Cook’s distance which gave 85 simulations as a final sample size. A generalized regression model was performed to identify the impact of each parameter. The accuracy of the model is above 97% and the sensitivity analysis shows that the most important factor is the balcony to room ratio which could reduce the energy demand up to 26% followed by the window type (24%), the orientation (8%) and the balcony position (5%). This conclusion stresses the idea of considering the balcony as a passive solution to reduce the cooling energy demand.
{"title":"Exploring the impact of balconies on cooling energy demand in an arid climate zone","authors":"Soufiane Boukarta","doi":"10.2478/sspjce-2021-0014","DOIUrl":"https://doi.org/10.2478/sspjce-2021-0014","url":null,"abstract":"Abstract This paper explores the impact of balconies on the energy demand required for cooling in the arid climate zone of the city of Adrar, in Algeria. For the purpose to assess several situations of the balconies, we have chosen a parametric method based on a campaign of thermal simulations. The open and eliminated balcony type were selected and characterized by four parameters: the balcony to room ratio, the orientation, the window type, and the balcony position. A set of 100 simulations was selected randomly based on the Monte-Carlo probability technique. The final sample was corrected based on Cook’s distance which gave 85 simulations as a final sample size. A generalized regression model was performed to identify the impact of each parameter. The accuracy of the model is above 97% and the sensitivity analysis shows that the most important factor is the balcony to room ratio which could reduce the energy demand up to 26% followed by the window type (24%), the orientation (8%) and the balcony position (5%). This conclusion stresses the idea of considering the balcony as a passive solution to reduce the cooling energy demand.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"11 1","pages":"25 - 35"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88634582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.2478/sspjce-2021-0022
Boumaza Ouafa, Bordjiba Abdelhak
Abstract This research was carried out on the state of degradation of the historic core of Annaba city, Algeria. This degradation is caused by multiple factors, the most important of which is the absence of shared responsibility of public actors. The number of collapses multiplied which became a source for the creation of large office buildings with modernist tendencies, but without any architectural identity. The real estate park in downtown Annaba brings together urban entities according to various principles and logics of composition, structuring the urban image of the city of Annaba. The objective of this study is to build a complete catalogue summarizing the structures and fundamental characteristics of old buildings. Initially, this study defines all the notions linked to urban morphology and the typologies of housing. Secondly, an architectural study will be carried out on the “income house”, which represents the basic unit for the development of this historic nucleus. The typological analysis was applied to 44 buildings from the 19th and early 20th centuries located on the boulevard named “Revolution Square” in order to identify a set of common and specific criteria for the classification of “house income”.
{"title":"Revenue House - architectural typology to be valorised","authors":"Boumaza Ouafa, Bordjiba Abdelhak","doi":"10.2478/sspjce-2021-0022","DOIUrl":"https://doi.org/10.2478/sspjce-2021-0022","url":null,"abstract":"Abstract This research was carried out on the state of degradation of the historic core of Annaba city, Algeria. This degradation is caused by multiple factors, the most important of which is the absence of shared responsibility of public actors. The number of collapses multiplied which became a source for the creation of large office buildings with modernist tendencies, but without any architectural identity. The real estate park in downtown Annaba brings together urban entities according to various principles and logics of composition, structuring the urban image of the city of Annaba. The objective of this study is to build a complete catalogue summarizing the structures and fundamental characteristics of old buildings. Initially, this study defines all the notions linked to urban morphology and the typologies of housing. Secondly, an architectural study will be carried out on the “income house”, which represents the basic unit for the development of this historic nucleus. The typological analysis was applied to 44 buildings from the 19th and early 20th centuries located on the boulevard named “Revolution Square” in order to identify a set of common and specific criteria for the classification of “house income”.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"215 1","pages":"141 - 152"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73749829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.2478/sspjce-2021-0017
Soufiane Boukarta
Abstract The key design strategies that reduce the energy demand of buildings are not present in most thermal codes in many countries. Therefore, modeling techniques offer an alternative to combine the architects' modus operandi with the energy efficiency in the early stages of architectural design and with higher speed and precision. However, a review of the scientific literature using modeling techniques shows that most researchers use a relatively large sample of thermal simulations. This paper proposes a simplified method based on the linear regression modeling technique and considers a relatively smaller sample of thermal simulations. A total of 6 key building design strategies were identified, related to the urban context, building envelope, and shape factor. A simulation protocol containing 60 possible combinations was designed by random selection. In the present study, the Pleiades software was used to estimate the annual energy demand for heating and cooling for a typical dwelling in a humid climate zone. A parametric study and sensitivity analysis to identify the most efficient parameters was performed in SPSS 21. The resulting model predicts the annual energy demand with an accuracy of 93.7%, a root mean square error (RMSE) of 5.88, and a scatter index (SI) of 8.59%. The models performed could efficiently and quickly assist architects while designing the buildings in the architectural practice.
{"title":"Predicting energy demand of residential buildings: A linear regression-based approach for a small sample size","authors":"Soufiane Boukarta","doi":"10.2478/sspjce-2021-0017","DOIUrl":"https://doi.org/10.2478/sspjce-2021-0017","url":null,"abstract":"Abstract The key design strategies that reduce the energy demand of buildings are not present in most thermal codes in many countries. Therefore, modeling techniques offer an alternative to combine the architects' modus operandi with the energy efficiency in the early stages of architectural design and with higher speed and precision. However, a review of the scientific literature using modeling techniques shows that most researchers use a relatively large sample of thermal simulations. This paper proposes a simplified method based on the linear regression modeling technique and considers a relatively smaller sample of thermal simulations. A total of 6 key building design strategies were identified, related to the urban context, building envelope, and shape factor. A simulation protocol containing 60 possible combinations was designed by random selection. In the present study, the Pleiades software was used to estimate the annual energy demand for heating and cooling for a typical dwelling in a humid climate zone. A parametric study and sensitivity analysis to identify the most efficient parameters was performed in SPSS 21. The resulting model predicts the annual energy demand with an accuracy of 93.7%, a root mean square error (RMSE) of 5.88, and a scatter index (SI) of 8.59%. The models performed could efficiently and quickly assist architects while designing the buildings in the architectural practice.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"25 1","pages":"67 - 85"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89116174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.2478/sspjce-2021-0026
Kechkar Chiraz, B. F. Zohra, Nigri Ghania, Hebhoube Houria, C. Yacine, M. Belachia
Abstract The work presented in this paper aims to study the durability of mortars, in which part of the sand has been replaced with rubber aggregates from used tires and have undergone a surface treatment with a sodium hydroxide solution (NaOH). The substitution rates studied are 10%, 17.5%, and 25%. The results are compared with ordinary mortar and mortars with untreated rubber aggregates while samples with the same substitution rates were used. To do this, the following properties have been studied: compressive strength, flexural tensile strength, water absorption by capillarity, water absorption by total immersion, water-accessible porosity, water permeability, and resistance to the chemical degradation by sulfuric acid H2SO4. The results obtained show that the treatment of rubber aggregates by the solution method (NaOH) presented a considerable improvement in mechanical performance (increase in compressive strength and flexural tensile strength) and better durability compared to reference mortar and mortar with untreated rubber granulate.
{"title":"Influence of NaOH treatment of rubber aggregates on the durability properties of rubberized mortars","authors":"Kechkar Chiraz, B. F. Zohra, Nigri Ghania, Hebhoube Houria, C. Yacine, M. Belachia","doi":"10.2478/sspjce-2021-0026","DOIUrl":"https://doi.org/10.2478/sspjce-2021-0026","url":null,"abstract":"Abstract The work presented in this paper aims to study the durability of mortars, in which part of the sand has been replaced with rubber aggregates from used tires and have undergone a surface treatment with a sodium hydroxide solution (NaOH). The substitution rates studied are 10%, 17.5%, and 25%. The results are compared with ordinary mortar and mortars with untreated rubber aggregates while samples with the same substitution rates were used. To do this, the following properties have been studied: compressive strength, flexural tensile strength, water absorption by capillarity, water absorption by total immersion, water-accessible porosity, water permeability, and resistance to the chemical degradation by sulfuric acid H2SO4. The results obtained show that the treatment of rubber aggregates by the solution method (NaOH) presented a considerable improvement in mechanical performance (increase in compressive strength and flexural tensile strength) and better durability compared to reference mortar and mortar with untreated rubber granulate.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"58 1","pages":"189 - 201"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82022789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.2478/sspjce-2021-0025
M. Bencheikh, Assia Aidoud, B. F. Zohra, Belabed Lazhar, Dorbani Meriem
Abstract In the geotechnical engineering field, shallow foundations are frequently needed to ensure good fieldwork stability. They are also intended to permanently and uniformly transmit all load pressure on the seating floor. However, numerous mechanical constraints, such as bearing capacity of foundations, durability, stability, design of shallow foundations, lead, unfortunately, to a serious realization challenge. Finding an adequate solution presents the main goal and effort of both scholars and professionals. Indeed, the corresponding drawback is observed through the high number of reported damages that occurred in the structure of foundations and the punching failure. The failure mechanisms of shallow foundations, verified in full size or on scale models, show “sliding surfaces” and rigid (solid) blocks, which can be described with the kinematic method of rigid solids. The main objective of this study is the application of the kinematic method of rigid solids in the study of the stability of shallow foundations with respect to punching, the purpose of which is to determine the bearing capacity factors Nc, Nγ, and the passive earth pressure coefficient Kp of foundations. In this context, two mechanical models have been proposed with 5 and 7 rigid solids, and a program developed via the MathCAD environment is applied to check the validity of the two previous models. The kinematic method of rigid solids gives results very close and comparable with that of Caquot/Kerisel for the factors of the bearing capacity and passive earth pressure coefficient - the ratio Kp - according to the five- and seven-solid model.
{"title":"An attempt to apply the kinematic method of rigid solids in the study of bearing capacity of shallow foundations","authors":"M. Bencheikh, Assia Aidoud, B. F. Zohra, Belabed Lazhar, Dorbani Meriem","doi":"10.2478/sspjce-2021-0025","DOIUrl":"https://doi.org/10.2478/sspjce-2021-0025","url":null,"abstract":"Abstract In the geotechnical engineering field, shallow foundations are frequently needed to ensure good fieldwork stability. They are also intended to permanently and uniformly transmit all load pressure on the seating floor. However, numerous mechanical constraints, such as bearing capacity of foundations, durability, stability, design of shallow foundations, lead, unfortunately, to a serious realization challenge. Finding an adequate solution presents the main goal and effort of both scholars and professionals. Indeed, the corresponding drawback is observed through the high number of reported damages that occurred in the structure of foundations and the punching failure. The failure mechanisms of shallow foundations, verified in full size or on scale models, show “sliding surfaces” and rigid (solid) blocks, which can be described with the kinematic method of rigid solids. The main objective of this study is the application of the kinematic method of rigid solids in the study of the stability of shallow foundations with respect to punching, the purpose of which is to determine the bearing capacity factors Nc, Nγ, and the passive earth pressure coefficient Kp of foundations. In this context, two mechanical models have been proposed with 5 and 7 rigid solids, and a program developed via the MathCAD environment is applied to check the validity of the two previous models. The kinematic method of rigid solids gives results very close and comparable with that of Caquot/Kerisel for the factors of the bearing capacity and passive earth pressure coefficient - the ratio Kp - according to the five- and seven-solid model.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"27 1","pages":"175 - 187"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73374923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-01DOI: 10.2478/sspjce-2021-0027
Nawel Bousbia
Abstract The excavation process of tunnels induces stresses and deformation in the surrounding soil. The method of excavation is one of the major problems related to the safety of the operators and the ground stability during the construction of underground works. So, it is necessary to choose an ideal method to minimize the displacements and stresses induced by tunneling. The main aim of this study is to simulate numerically the effect of different processes of tunneling on ground displacements, the settlements at surface soil and the internal efforts induced in the lining tunnel; in order to select the best process of excavation, which gives us a less effects on displacements generated by tunneling, thus, ensuring the stability and the solidity of the underground constructions. In addition, this study allows us to control and to predict the diverse movements generated by tunneling (displacements, settlements, efforts internes) exclusively for the shallow tunnel nearby to the underground constructions in the urban site. This modeling will be done by employing five different processes for tunnel excavation using the NATM (New Austrian Tunneling Method) method. The first process, the modeling of the excavation tunnel, is done almost in the same way as in reality; the partial face excavation, with seven slices, made by the excavation. The second process, by partial face excavation, is divided into eleven slices, next, we used the partial face excavation by nine slices, and then in thirteen slices. Finally, the dig is made by full-face excavation. The paper contributes to the prediction of the response of the soil environment to tunnel excavation using the NATM method and to minimize the diverse movements generated by tunneling. The appropriately chosen methodology confirms that displacements and subsidence are strongly influenced by the tunneling method. The three-dimensional Finite Elements Method using Plaxis3D program has been applied in the numerical simulation. The study resulted in the recommendation of a process that minimizes the effect of excavation on subsidence and ground displacement for a particular Setiha tunnel.
{"title":"Effects of different processes of tunneling on displacements soil using 3D Finite Element Method","authors":"Nawel Bousbia","doi":"10.2478/sspjce-2021-0027","DOIUrl":"https://doi.org/10.2478/sspjce-2021-0027","url":null,"abstract":"Abstract The excavation process of tunnels induces stresses and deformation in the surrounding soil. The method of excavation is one of the major problems related to the safety of the operators and the ground stability during the construction of underground works. So, it is necessary to choose an ideal method to minimize the displacements and stresses induced by tunneling. The main aim of this study is to simulate numerically the effect of different processes of tunneling on ground displacements, the settlements at surface soil and the internal efforts induced in the lining tunnel; in order to select the best process of excavation, which gives us a less effects on displacements generated by tunneling, thus, ensuring the stability and the solidity of the underground constructions. In addition, this study allows us to control and to predict the diverse movements generated by tunneling (displacements, settlements, efforts internes) exclusively for the shallow tunnel nearby to the underground constructions in the urban site. This modeling will be done by employing five different processes for tunnel excavation using the NATM (New Austrian Tunneling Method) method. The first process, the modeling of the excavation tunnel, is done almost in the same way as in reality; the partial face excavation, with seven slices, made by the excavation. The second process, by partial face excavation, is divided into eleven slices, next, we used the partial face excavation by nine slices, and then in thirteen slices. Finally, the dig is made by full-face excavation. The paper contributes to the prediction of the response of the soil environment to tunnel excavation using the NATM method and to minimize the diverse movements generated by tunneling. The appropriately chosen methodology confirms that displacements and subsidence are strongly influenced by the tunneling method. The three-dimensional Finite Elements Method using Plaxis3D program has been applied in the numerical simulation. The study resulted in the recommendation of a process that minimizes the effect of excavation on subsidence and ground displacement for a particular Setiha tunnel.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"27 1","pages":"203 - 217"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90541384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1515/sspjce-2021-0007
Adjabi Souhila, Nouaouria Mohamed Salah
Abstract Considering Soil reinforcement techniques have been rapidly developed because of its efficiency in geotechnical engineering. The goal of this experimental work is to improve the characteristics of a collapsible soil with polyethylene fibers in the aim of reducing the number of plastic bottles thrown in nature and with natural materials such as sisal fibers. Polyethylene fibers contents in mass were used in this investigation, namely: 5%, 10% and 15%; Sisal fibers contents: 0.5% and 1% respectively. Oedometer apparatus is used to study the reinforcing fibers effect on the Collapse Potential, and direct shear box is used to determine the intrinsic characteristics of this treated soil. Results show that when the fiber reinforcement is combined with other processing procedures such as compaction and the addition of APC cement decrease the collapse potential until a non-collapsible soil is obtained.
{"title":"Behaviour of cemented and compacted clayey sand reinforced with two types of fibers","authors":"Adjabi Souhila, Nouaouria Mohamed Salah","doi":"10.1515/sspjce-2021-0007","DOIUrl":"https://doi.org/10.1515/sspjce-2021-0007","url":null,"abstract":"Abstract Considering Soil reinforcement techniques have been rapidly developed because of its efficiency in geotechnical engineering. The goal of this experimental work is to improve the characteristics of a collapsible soil with polyethylene fibers in the aim of reducing the number of plastic bottles thrown in nature and with natural materials such as sisal fibers. Polyethylene fibers contents in mass were used in this investigation, namely: 5%, 10% and 15%; Sisal fibers contents: 0.5% and 1% respectively. Oedometer apparatus is used to study the reinforcing fibers effect on the Collapse Potential, and direct shear box is used to determine the intrinsic characteristics of this treated soil. Results show that when the fiber reinforcement is combined with other processing procedures such as compaction and the addition of APC cement decrease the collapse potential until a non-collapsible soil is obtained.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"14 1","pages":"87 - 103"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75071061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1515/sspjce-2021-0002
N. Haddadou, Messaouda Boulkhiout, M. Mansour, R. Chaid, Y. Ghernouti
Abstract The current study aims at highlighting the fresh and hardened characteristics of self-compacting concrete (SCC) incorporating marble powder and steel fibers at different sizes. Seven SCC mixtures were investigated with two different types of steel fibers were used in combination at different proportions, keeping the total fiber content constant at 72 kg/m3, 400 kg/m3 of cement and 80kg of marble powder was substituted by weight of fine and coarse aggregate. Slump flow time and diameter, L-Box, and sieve segregation test were performed to assess the fresh properties of the concrete. Compressive strength, splitting tensile strength, fracture energy and ultrasonic pulse velocity of the concrete were determined for the hardened properties. The results indicate that marble powder with high fineness can be used with steel fiber to produce reinforced self-compacting concrete (RSCC) with an improvement in the hardened properties, even though there is some reduction in the fresh properties because of the use of large steel fibers.
{"title":"The effect of steel fiber size on the properties of fresh and hardened self-compacting concrete incorporating marble powder","authors":"N. Haddadou, Messaouda Boulkhiout, M. Mansour, R. Chaid, Y. Ghernouti","doi":"10.1515/sspjce-2021-0002","DOIUrl":"https://doi.org/10.1515/sspjce-2021-0002","url":null,"abstract":"Abstract The current study aims at highlighting the fresh and hardened characteristics of self-compacting concrete (SCC) incorporating marble powder and steel fibers at different sizes. Seven SCC mixtures were investigated with two different types of steel fibers were used in combination at different proportions, keeping the total fiber content constant at 72 kg/m3, 400 kg/m3 of cement and 80kg of marble powder was substituted by weight of fine and coarse aggregate. Slump flow time and diameter, L-Box, and sieve segregation test were performed to assess the fresh properties of the concrete. Compressive strength, splitting tensile strength, fracture energy and ultrasonic pulse velocity of the concrete were determined for the hardened properties. The results indicate that marble powder with high fineness can be used with steel fiber to produce reinforced self-compacting concrete (RSCC) with an improvement in the hardened properties, even though there is some reduction in the fresh properties because of the use of large steel fibers.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"7 1","pages":"23 - 34"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77712848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1515/sspjce-2021-0012
Noura Houssou, S. Messast, Assia Abdelouahed
Abstract The study of the response of deep foundations under different types of stress was the subject of several studies, but it is always very useful to understand the phenomena accompanying the behavior of these foundations in contact with the ground, and to propose simple and more efficient approaches. This paper presents a numerical analysis of the response of a pile foundation subjected to axial load with taking account the soil-pile interaction. The analysis of the composite pile–soil system was performed using the Finite Element Method (FEM) using software Plaxis 3D tunnel. The pile- soil analyses and design is an interaction three dimensional problem, wherein, the applied load is transferred by a complicated interaction process between the piles and the soil. To reduce the analysis volume of interaction problems, it is necessary to have a relatively simple design procedure so that the preliminary design can provide adequate but reasonably accurate data for the final analysis. The method consists to replacing two configurations of pile group with a single equivalent pier of the same length and an equivalent diameter. This equivalent pier is described by his material properties that result of the homogenisation of the piles and the surrounding soil. In this study, two types of symmetric and asymmetric pile group configurations are examined. The numerical results of settlements were compared with the field measurements collected from case history, which showed good agreement. The pier equivalent method can decrease the interaction factor of 2×2 pile groups by 16% than the interaction factor of single pile group.
{"title":"3D Analysis interaction of piles groups under vertical load","authors":"Noura Houssou, S. Messast, Assia Abdelouahed","doi":"10.1515/sspjce-2021-0012","DOIUrl":"https://doi.org/10.1515/sspjce-2021-0012","url":null,"abstract":"Abstract The study of the response of deep foundations under different types of stress was the subject of several studies, but it is always very useful to understand the phenomena accompanying the behavior of these foundations in contact with the ground, and to propose simple and more efficient approaches. This paper presents a numerical analysis of the response of a pile foundation subjected to axial load with taking account the soil-pile interaction. The analysis of the composite pile–soil system was performed using the Finite Element Method (FEM) using software Plaxis 3D tunnel. The pile- soil analyses and design is an interaction three dimensional problem, wherein, the applied load is transferred by a complicated interaction process between the piles and the soil. To reduce the analysis volume of interaction problems, it is necessary to have a relatively simple design procedure so that the preliminary design can provide adequate but reasonably accurate data for the final analysis. The method consists to replacing two configurations of pile group with a single equivalent pier of the same length and an equivalent diameter. This equivalent pier is described by his material properties that result of the homogenisation of the piles and the surrounding soil. In this study, two types of symmetric and asymmetric pile group configurations are examined. The numerical results of settlements were compared with the field measurements collected from case history, which showed good agreement. The pier equivalent method can decrease the interaction factor of 2×2 pile groups by 16% than the interaction factor of single pile group.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"43 1","pages":"157 - 173"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88023809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1515/sspjce-2021-0006
A. Ghrieb, Y. Abadou, R. Bustamante
Abstract This present study aims to examine the possibility of using the dune sand which is abundant in Algeria in the manufacture of mortars having sufficient physical and mechanical performances to exploit them in different applications in the field of construction of buildings. The improvement of the mortars based on dune sand was made through the addition of crushed wastes of ceramic tiles and red clay brick. The formulation of mixtures is based on the substitution of dune sand with crushed wastes at different weight contents; 5, 10, 15, 20 and 25%. The W/C ratio is fixed at 0.7. The results obtained show that the incorporation of these additions improves the compactness, the mechanical strengths and the sulphate resistance, and enhancement the dynamic modulus of elasticity with 15% ratio of waste incorporation. Further to this, it was also observed that the inclusion of the used wastes with determined percentages can provide physical and mechanical performances exceed that given by the mortar made with alluvial sand, which demonstrate their effectiveness to the improvement of the various properties of the mortar.
{"title":"Investigation on the use of crushed waste of ceramic tiles and clay brick as aggregate in dune sand based mortars","authors":"A. Ghrieb, Y. Abadou, R. Bustamante","doi":"10.1515/sspjce-2021-0006","DOIUrl":"https://doi.org/10.1515/sspjce-2021-0006","url":null,"abstract":"Abstract This present study aims to examine the possibility of using the dune sand which is abundant in Algeria in the manufacture of mortars having sufficient physical and mechanical performances to exploit them in different applications in the field of construction of buildings. The improvement of the mortars based on dune sand was made through the addition of crushed wastes of ceramic tiles and red clay brick. The formulation of mixtures is based on the substitution of dune sand with crushed wastes at different weight contents; 5, 10, 15, 20 and 25%. The W/C ratio is fixed at 0.7. The results obtained show that the incorporation of these additions improves the compactness, the mechanical strengths and the sulphate resistance, and enhancement the dynamic modulus of elasticity with 15% ratio of waste incorporation. Further to this, it was also observed that the inclusion of the used wastes with determined percentages can provide physical and mechanical performances exceed that given by the mortar made with alluvial sand, which demonstrate their effectiveness to the improvement of the various properties of the mortar.","PeriodicalId":30755,"journal":{"name":"Selected Scientific Papers Journal of Civil Engineering","volume":"52 1","pages":"67 - 86"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91127604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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