Pub Date : 2023-04-13DOI: 10.36348/sjce.2023.v07i03.001
U. N. Okonkwo, C. Kennedy
This study investigated the effects of cement and lime on the mechanical properties of subgrade soils, which are challenging to stabilize due to high plasticity and swelling potential. The study found that both cement and lime are effective stabilizing agents that increase the OMC, with cement being more effective in reducing the OMC of black cotton soil. The engineering properties of stabilized Chokocho subgrade soil were also evaluated, and the use of cement and lime as stabilizers was found to be effective in improving soil characteristics for subgrade applications. This was indicated by increased maximum dry density values, reduced plasticity index values, and increased California bearing ratio and unconfined compressive strength values. The chemical composition test demonstrated that calcium plays a significant role in soil stabilization, while aluminum can potentially affect soil stability negatively. Other elements such as magnesium, iron, silicon, zinc, and nickel contribute positively to soil stability. The low amounts of lead, copper, manganese, potassium, sulfur, and titanium present in the soil indicate a minor contribution to soil stabilization, but their impact on soil properties and plant growth cannot be ignored. Overall, the study highlights the importance of considering specific soil types and conditions when undertaking soil stabilization projects. The findings provide valuable information for future research in this field, particularly in investigating the effectiveness of other stabilizers and their interactions with specific soil types. The use of cement and lime in soil stabilization is an effective method for enhancing the strength and durability of weak soils, as shown by the reduction in plastic limit values observed in the stabilized soil samples. The appropriate content of cement and lime to use in soil stabilization could inform standards and codes for soil stabilization.
{"title":"The Effectiveness of Cement and Lime as Stabilizers for Subgrade Soils with High Plasticity and Swelling Potential","authors":"U. N. Okonkwo, C. Kennedy","doi":"10.36348/sjce.2023.v07i03.001","DOIUrl":"https://doi.org/10.36348/sjce.2023.v07i03.001","url":null,"abstract":"This study investigated the effects of cement and lime on the mechanical properties of subgrade soils, which are challenging to stabilize due to high plasticity and swelling potential. The study found that both cement and lime are effective stabilizing agents that increase the OMC, with cement being more effective in reducing the OMC of black cotton soil. The engineering properties of stabilized Chokocho subgrade soil were also evaluated, and the use of cement and lime as stabilizers was found to be effective in improving soil characteristics for subgrade applications. This was indicated by increased maximum dry density values, reduced plasticity index values, and increased California bearing ratio and unconfined compressive strength values. The chemical composition test demonstrated that calcium plays a significant role in soil stabilization, while aluminum can potentially affect soil stability negatively. Other elements such as magnesium, iron, silicon, zinc, and nickel contribute positively to soil stability. The low amounts of lead, copper, manganese, potassium, sulfur, and titanium present in the soil indicate a minor contribution to soil stabilization, but their impact on soil properties and plant growth cannot be ignored. Overall, the study highlights the importance of considering specific soil types and conditions when undertaking soil stabilization projects. The findings provide valuable information for future research in this field, particularly in investigating the effectiveness of other stabilizers and their interactions with specific soil types. The use of cement and lime in soil stabilization is an effective method for enhancing the strength and durability of weak soils, as shown by the reduction in plastic limit values observed in the stabilized soil samples. The appropriate content of cement and lime to use in soil stabilization could inform standards and codes for soil stabilization.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116850494","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 : 2023-03-30DOI: 10.36348/sjce.2023.v07i02.003
Comparative economic analysis using present net worth method was carried for 1 km of rigid and flexible pavement of Isieke Road, Ebonyi State. Information on the initial construction cost of the given length of the road, the maintenance cost, the rehabilitation cost, the salvage cost and the user cost which were obtained from the Ministry of Works, Ebonyi State, were used to assess the life cycle cost of the each alternative using the present net worth method. Comparisons between the various costs used to determine the life cycle cost for both rigid and flexible pavement showed that except the initial cost of construction where the rigid pavement is considerably higher than the flexible pavement, the other costs show the flexible pavement being on the high side. The summary cost showed that the for the period of 40 years which was the period of study in this work, the life cycle cost (LCC) of rigid pavement is 8.52% lower than that of the flexible pavement. Considering economy, this savings in LCC makes it a more viable alternative to flexible pavement.
{"title":"Investigation of the Economic and Life Cycle Cost Benefits of Concrete Pavement over Asphalt Pavement: Case Study of Isieke Road, Ebonyi State","authors":"","doi":"10.36348/sjce.2023.v07i02.003","DOIUrl":"https://doi.org/10.36348/sjce.2023.v07i02.003","url":null,"abstract":"Comparative economic analysis using present net worth method was carried for 1 km of rigid and flexible pavement of Isieke Road, Ebonyi State. Information on the initial construction cost of the given length of the road, the maintenance cost, the rehabilitation cost, the salvage cost and the user cost which were obtained from the Ministry of Works, Ebonyi State, were used to assess the life cycle cost of the each alternative using the present net worth method. Comparisons between the various costs used to determine the life cycle cost for both rigid and flexible pavement showed that except the initial cost of construction where the rigid pavement is considerably higher than the flexible pavement, the other costs show the flexible pavement being on the high side. The summary cost showed that the for the period of 40 years which was the period of study in this work, the life cycle cost (LCC) of rigid pavement is 8.52% lower than that of the flexible pavement. Considering economy, this savings in LCC makes it a more viable alternative to flexible pavement.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126323617","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 : 2023-03-26DOI: 10.36348/sjce.2023.v07i02.002
Md Wahiduzzaman, G. C. Paul
This research article presents a numerical simulation of the extensive severe cyclonic storm Fani and its impact along the coast of Bangladesh, which made landfall in the coastal region of Odisha, India, on May 3, 2019. A semi-implicit finite difference method in Cartesian coordinates was employed in this study to solve vertically integrated shallow water equations. The approach allowed for effective forecasting of the storm Fani's impact on the region of choice. Our considered physical domain is discretized with high-resolution gird to cover all the big and small offshore islands. The model predicted water levels for a total of sixteen coastal stations of the Bay of Bengal along the coast of Bangladesh (from 2 May to 03 May 2019, at 3-h interval). Simulated water levels are found closely co-related to the reported data. The simulation results demonstrate that the semi-implicit finite difference method is an effective tool for simulating the storm surge and flooding caused by any severe cyclonic storm. The study also shows that the storm surge and flooding caused by Fani were significant, with a maximum surge height of over 5 meters in some areas. The simulated results provide insights into the spatial and temporal evolution of the storm surge and flooding, which can be useful for designing and implementing appropriate disaster management strategies in the affected regions. Overall, this research article contributes to the scientific understanding of the behavior of severe cyclonic storms and the associated storm surge and flooding, and provides a valuable tool for policymakers and stakeholders to develop and implement effective disaster management strategies in cyclone vulnerable coastal regions.
{"title":"Assessing the Impact of Extensive Severe Cyclonic Storm Fani on the Coastal Communities of Bangladesh: A Case Study","authors":"Md Wahiduzzaman, G. C. Paul","doi":"10.36348/sjce.2023.v07i02.002","DOIUrl":"https://doi.org/10.36348/sjce.2023.v07i02.002","url":null,"abstract":"This research article presents a numerical simulation of the extensive severe cyclonic storm Fani and its impact along the coast of Bangladesh, which made landfall in the coastal region of Odisha, India, on May 3, 2019. A semi-implicit finite difference method in Cartesian coordinates was employed in this study to solve vertically integrated shallow water equations. The approach allowed for effective forecasting of the storm Fani's impact on the region of choice. Our considered physical domain is discretized with high-resolution gird to cover all the big and small offshore islands. The model predicted water levels for a total of sixteen coastal stations of the Bay of Bengal along the coast of Bangladesh (from 2 May to 03 May 2019, at 3-h interval). Simulated water levels are found closely co-related to the reported data. The simulation results demonstrate that the semi-implicit finite difference method is an effective tool for simulating the storm surge and flooding caused by any severe cyclonic storm. The study also shows that the storm surge and flooding caused by Fani were significant, with a maximum surge height of over 5 meters in some areas. The simulated results provide insights into the spatial and temporal evolution of the storm surge and flooding, which can be useful for designing and implementing appropriate disaster management strategies in the affected regions. Overall, this research article contributes to the scientific understanding of the behavior of severe cyclonic storms and the associated storm surge and flooding, and provides a valuable tool for policymakers and stakeholders to develop and implement effective disaster management strategies in cyclone vulnerable coastal regions.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126346800","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 : 2023-03-14DOI: 10.36348/sjce.2023.v07i02.001
Akinbuluma Ayodeji Theophilus, C. Kennedy
The study investigated the changes in soil properties as a function bagasse ash proportion during soil stabilization. Addition of bagasse ash in soil during stabilization is carried out to improve the properties of soil susceptible to deformation under load effect. The bagasse ash was obtained from Costus cupreifolius mass. The experimental values obtained from maximum dry density (MDD), optimum moisture content (OMC), consistency limits, California bearing ratio (CBR) and unconfined compressive strength (UCS) were fitted to a linear model to ascertain the degree of correlation between the properties and the percentage of bagasse ash. Experimental results showed that bagasse ash improved the properties of the soil positively. Thus, the maximum dry density, optimum moisture content, and the consistency limits of the stabilized soil reduced with addition of bagasse ash, while the California bearing ratio and unconfined compressive strength of the soil were increased. The model also interpreted the fitted experimental observations with correlation coefficients ranging from 0.7501 to 0.9792. Therefore, using a mathematical model will be useful to predict the properties of soil for a given mix design without direct measurement, especially in the case where the instrument is prone to error. Application of model would also be useful for design and analysis.
{"title":"Correlation of Soil Properties with Costus cupreifolius Maas Admixture during Stabilization","authors":"Akinbuluma Ayodeji Theophilus, C. Kennedy","doi":"10.36348/sjce.2023.v07i02.001","DOIUrl":"https://doi.org/10.36348/sjce.2023.v07i02.001","url":null,"abstract":"The study investigated the changes in soil properties as a function bagasse ash proportion during soil stabilization. Addition of bagasse ash in soil during stabilization is carried out to improve the properties of soil susceptible to deformation under load effect. The bagasse ash was obtained from Costus cupreifolius mass. The experimental values obtained from maximum dry density (MDD), optimum moisture content (OMC), consistency limits, California bearing ratio (CBR) and unconfined compressive strength (UCS) were fitted to a linear model to ascertain the degree of correlation between the properties and the percentage of bagasse ash. Experimental results showed that bagasse ash improved the properties of the soil positively. Thus, the maximum dry density, optimum moisture content, and the consistency limits of the stabilized soil reduced with addition of bagasse ash, while the California bearing ratio and unconfined compressive strength of the soil were increased. The model also interpreted the fitted experimental observations with correlation coefficients ranging from 0.7501 to 0.9792. Therefore, using a mathematical model will be useful to predict the properties of soil for a given mix design without direct measurement, especially in the case where the instrument is prone to error. Application of model would also be useful for design and analysis.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116827848","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 : 2023-02-27DOI: 10.36348/sjce.2023.v07i01.001
Saugat Tiwari, S. Adhikari
This paper presents the behavior of three different types of irregular low-rise buildings, subjected to earthquake load. The study is performed by numerically modelling the buildings for the linear static analysis. Structural parameters displacements, drift, and storey shear are checked for various time periods of the building. The same models are also analyzed using nonlinear pushover analysis. The model is made nonlinear by introducing the hinges in the beam and column. The execution of nonlinear analysis is done by applying push in X and push in Y directions in controlled displacement mode. After the execution of nonlinear pushover analysis, different colours of hinges were formed, which were used as a basis for the study. The parameters like maximum displacement, max storey drift, and storey shear were computed in both in X and Y directions. Peak ground acceleration of Gorkha earthquake, EI Centro earthquake, and Kobe earthquakes was used for time history analysis. The results for max displacement, base shear, and max storey drift are presented and the comparison is made for the different building models. The study showed that a building behaves well in seismic loading even though they have an irregular plan with a larger structure size, compared to a building that has a regular plan and a smaller structural member size.
{"title":"Seismic Behaviour of the Low-Rise RC Buildings in Nonlinear Static and Dynamic Analysis","authors":"Saugat Tiwari, S. Adhikari","doi":"10.36348/sjce.2023.v07i01.001","DOIUrl":"https://doi.org/10.36348/sjce.2023.v07i01.001","url":null,"abstract":"This paper presents the behavior of three different types of irregular low-rise buildings, subjected to earthquake load. The study is performed by numerically modelling the buildings for the linear static analysis. Structural parameters displacements, drift, and storey shear are checked for various time periods of the building. The same models are also analyzed using nonlinear pushover analysis. The model is made nonlinear by introducing the hinges in the beam and column. The execution of nonlinear analysis is done by applying push in X and push in Y directions in controlled displacement mode. After the execution of nonlinear pushover analysis, different colours of hinges were formed, which were used as a basis for the study. The parameters like maximum displacement, max storey drift, and storey shear were computed in both in X and Y directions. Peak ground acceleration of Gorkha earthquake, EI Centro earthquake, and Kobe earthquakes was used for time history analysis. The results for max displacement, base shear, and max storey drift are presented and the comparison is made for the different building models. The study showed that a building behaves well in seismic loading even though they have an irregular plan with a larger structure size, compared to a building that has a regular plan and a smaller structural member size.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134292024","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 : 2022-12-08DOI: 10.36348/sjce.2022.v06i11.002
M. Shadab
Composting is a technology for recycling organic materials in order to achieve enhanced agricultural production. Composting proceeds under controlled conditions in compost heaps and pits (Müller-Sämann, 1986). Heaps should have a minimum size of 1 m3 and are suitable for more humid environments where there is potential for watering the compost. The ratio of C to N in the compost pile is important for optimizing microbial activity. In this article, we will compare and contrast various composting techniques to examine the impact of composting on the environment. The composting process is impacted by temperature, Different composting techniques have an impact on both the physical characteristics of compost and the chemical composition of compost. Additionally, it will analyze Carbon and Nitrogen ratio. Which will enable us to comprehend how composting affects the atmosphere.
{"title":"Compare and Contrast Various Composting Techniques to Examine the Impact of Composting on the Environment","authors":"M. Shadab","doi":"10.36348/sjce.2022.v06i11.002","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i11.002","url":null,"abstract":"Composting is a technology for recycling organic materials in order to achieve enhanced agricultural production. Composting proceeds under controlled conditions in compost heaps and pits (Müller-Sämann, 1986). Heaps should have a minimum size of 1 m3 and are suitable for more humid environments where there is potential for watering the compost. The ratio of C to N in the compost pile is important for optimizing microbial activity. In this article, we will compare and contrast various composting techniques to examine the impact of composting on the environment. The composting process is impacted by temperature, Different composting techniques have an impact on both the physical characteristics of compost and the chemical composition of compost. Additionally, it will analyze Carbon and Nitrogen ratio. Which will enable us to comprehend how composting affects the atmosphere.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"125 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131879471","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 : 2022-12-06DOI: 10.36348/sjce.2022.v06i11.001
Ismaila S. Abdullahi, U. Umoh, A. C. Aapta
The effect of varying moisture content on the shear strength properties of soil was conducted in this study by varying the soil natural moisture content to 2% and then 4% increment at various depth. The soil sample was cored out using drilling method at different depth below the ground surface starting from 400mm to 24.75m for point 1 and 400mm to 11.25m for point 2. Its grain distribution was found by wet sieve analysis, The natural moisture content of each soil sample was determined, other basic experiments that was carried out are specific gravity, Atterberg limit test, sieve analysis. The result from the findings showed that the soils at point 1 and 2 are composed of silt and clay and the soil at point 2 have high plasticity than the soil in point 1. Also from the findings, it was found that soil shears faster at higher moisture content and that the angle of internal friction and cohesion index are inversely related.
{"title":"Effect of Varying Moisture Content on Shear Strength Properties of Soil","authors":"Ismaila S. Abdullahi, U. Umoh, A. C. Aapta","doi":"10.36348/sjce.2022.v06i11.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i11.001","url":null,"abstract":"The effect of varying moisture content on the shear strength properties of soil was conducted in this study by varying the soil natural moisture content to 2% and then 4% increment at various depth. The soil sample was cored out using drilling method at different depth below the ground surface starting from 400mm to 24.75m for point 1 and 400mm to 11.25m for point 2. Its grain distribution was found by wet sieve analysis, The natural moisture content of each soil sample was determined, other basic experiments that was carried out are specific gravity, Atterberg limit test, sieve analysis. The result from the findings showed that the soils at point 1 and 2 are composed of silt and clay and the soil at point 2 have high plasticity than the soil in point 1. Also from the findings, it was found that soil shears faster at higher moisture content and that the angle of internal friction and cohesion index are inversely related.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"15 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120908897","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 : 2022-11-22DOI: 10.36348/sjce.2022.v06i10.001
Maddula Rama Manikantha, M. Sophia
Concrete is used more than water worldwide. The need for Conventional concrete rises in tandem with the demand for concrete as a building material. According to estimates, cement production rose from 1.5 billion tons in 1995 to 4.5 billion tons in 2020. Finding a substitute for Cement concrete, whose production uses the most resources, is therefore inevitable. Researchers have been inspired to create an alternative binder paste to totally replace cement paste by the use of supplemental cementing ingredients such fly ash, silica fume, granulated blast furnace slag, and rice-husk ash. These inorganic amorphous binders will chemically react to form geo polymer concrete, a cutting-edge building material. We use additional cementitious materials in this that react with alkaline activators to create an Al-O-Si-O gel that has a comparable bonding strength to C-S-H gel. Because geopolymer concrete is already somewhat brittle, increasing its flexural and tensile strength is necessary. There are fibres included. In this study, the mechanical properties of geopolymer [M50] concrete with steel fibres were examined by curing it in an ambient condition.
{"title":"Mechanical Performance of Steel Fiber Reinforced Geopolymer Concrete","authors":"Maddula Rama Manikantha, M. Sophia","doi":"10.36348/sjce.2022.v06i10.001","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i10.001","url":null,"abstract":"Concrete is used more than water worldwide. The need for Conventional concrete rises in tandem with the demand for concrete as a building material. According to estimates, cement production rose from 1.5 billion tons in 1995 to 4.5 billion tons in 2020. Finding a substitute for Cement concrete, whose production uses the most resources, is therefore inevitable. Researchers have been inspired to create an alternative binder paste to totally replace cement paste by the use of supplemental cementing ingredients such fly ash, silica fume, granulated blast furnace slag, and rice-husk ash. These inorganic amorphous binders will chemically react to form geo polymer concrete, a cutting-edge building material. We use additional cementitious materials in this that react with alkaline activators to create an Al-O-Si-O gel that has a comparable bonding strength to C-S-H gel. Because geopolymer concrete is already somewhat brittle, increasing its flexural and tensile strength is necessary. There are fibres included. In this study, the mechanical properties of geopolymer [M50] concrete with steel fibres were examined by curing it in an ambient condition.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115131236","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 : 2022-09-30DOI: 10.36348/sjce.2022.v06i09.002
Enem, J. I
This work is aimed at formulating a polynomial function for the nonlinear analysis of CCCS isotropic rectangular thin plate. The previous researchers used trigonometry function as their shape function on the decoupled Von Karman’s equations to obtain particular stress and displacement function respectively. Trigonometry function can only be used effectively for SSSS and CCCC plates; apart from these boundaries conditions its efficiency reduces. This present work hence used a polynomial function to formulate the approximate shape function for the CCCS plate. Direct variational calculus was used applied on Von Karman’s equations to obtain the general form of minimized total potential energy which serves as a platform for the determination of coefficient factor( Amplitude or coefficient of deflection). The numerical values of CCCS plate under unit load were obtained using Amplitude equation formulated. These values were obtained for various aspect ratio (ranging from 1 to 1.5 with an increment of 0.1). This work was compared with the previous work [1] and the percentage difference in the results are within the acceptable limit. This results indicate that the approach adopted by the present work is adequate, reliable and satisfactory for the analysis of CCCS rectangular plate.
{"title":"Polynomial Based Nonlinear Analysis of CCCS Thin Isotropic Rectangular Plate","authors":"Enem, J. I","doi":"10.36348/sjce.2022.v06i09.002","DOIUrl":"https://doi.org/10.36348/sjce.2022.v06i09.002","url":null,"abstract":"This work is aimed at formulating a polynomial function for the nonlinear analysis of CCCS isotropic rectangular thin plate. The previous researchers used trigonometry function as their shape function on the decoupled Von Karman’s equations to obtain particular stress and displacement function respectively. Trigonometry function can only be used effectively for SSSS and CCCC plates; apart from these boundaries conditions its efficiency reduces. This present work hence used a polynomial function to formulate the approximate shape function for the CCCS plate. Direct variational calculus was used applied on Von Karman’s equations to obtain the general form of minimized total potential energy which serves as a platform for the determination of coefficient factor( Amplitude or coefficient of deflection). The numerical values of CCCS plate under unit load were obtained using Amplitude equation formulated. These values were obtained for various aspect ratio (ranging from 1 to 1.5 with an increment of 0.1). This work was compared with the previous work [1] and the percentage difference in the results are within the acceptable limit. This results indicate that the approach adopted by the present work is adequate, reliable and satisfactory for the analysis of CCCS rectangular plate.","PeriodicalId":437137,"journal":{"name":"Saudi Journal of Civil Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122229642","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 : 2022-09-30DOI: 10.36348/sjce.2022.v06i09.003
Enem, J. I
The work is aim at the development of a computer program for the nonlinear analysis of rectangular thin isotropic plate on Ritz method. Twelve boundary conditions were analyzed which include: SSSS, CCCC, CSCS, CSSS, CCSS, CCCS, CCFC, SSFS, CCFS, SCFC, CSFS, and SCFS. General expressions for displacement and stress functions for large deflection of isotropic thin rectangular plate under uniformly distributed transverse loading were obtained by direct integration of Von karman’s non-linear governing differential compatibility and equilibrium equations. Polynomial function as shape function was on the decoupled Von Karman’s equations to obtain particular stress and displacement functions respectively. Non-linear total potential Energy was formulated using Von Karman equilibrium equation and Ritz method was deployed in this formulation. A computer based program was developed using Matlab programming language to circumvent the challenges involved in solving the governing differential equations of thin rectangular plates. The developed program is capable of determining deflection and stresses at any point of the plate against the usual method of evaluating deflection at the center. The results obtained were compared with those of previous researchers The comparison made are only for SSSS, CCCC and CCCS plates. It was so because the remaining boundary conditions considered in this work have not been researched upon by previous researchers. From results obtained, the average percentage differences recorded for SSSS, CCCC, and CCCS plates for the present and previous studies are 4.01978%, 3.7646%, and 5.02% respectively. The percentage differences for the three plates compared are within acceptable limit of 0.05 or 5% level of significance in statistics. From the comparison made, it was obvious that an excellent agreement was observed in all cases thus indicating applicability and validity of the polynomial function and computer program for solving exact plate bending problems.
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