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Dr. Mohd Ahmed
Civil Engineering Department, College of Engineering, King Khalid University, Abha-6144, Saudi Arabia

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0 Concrete Materials
0 Sustainability
0 Sustainable Development
0 Construction materials
0 Soil Analysis And Management

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Journal article
Published: 22 August 2021 in Applied Sciences
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A soil nailing system is a proven effective and economic method used to stabilize earth slopes from the external (factors increasing the shear stress) and internal (factors decreasing material strength) failure causes. The laboratory models with scales of 1:10 are used to study the behavior of nailed soil slope with different soil and building foundation parameters. The models consist of Perspex strips as facing and steel bars as a nailing system to increase the stability of the soil slope. The models of sand beds are formed using an automatic sand raining system. Devices and instruments are installed to monitor the behavior of soil-nailed slope during and after construction. The effect of the soil type, soil slope angle, foundation width and position on the force mobilized in the nail, lateral displacement of the slope, settlement of the foundation and the earth pressure at the slope face, under and behind the soil mass at various foundation pressures, has been observed. It is found that the increase of soil density reduces both slopes facing displacement and building foundation settlements. The slope face displacement and footing settlement will increase with an increase in the width of the foundation and foundation position near the crest of the slope.

ACS Style

Mahmoud H. Mohamed; Mohd Ahmed; Javed Mallick. An Experimental Study of Nailed Soil Slope Models: Effects of Building Foundation and Soil Characteristics. Applied Sciences 2021, 11, 7735 .

AMA Style

Mahmoud H. Mohamed, Mohd Ahmed, Javed Mallick. An Experimental Study of Nailed Soil Slope Models: Effects of Building Foundation and Soil Characteristics. Applied Sciences. 2021; 11 (16):7735.

Chicago/Turabian Style

Mahmoud H. Mohamed; Mohd Ahmed; Javed Mallick. 2021. "An Experimental Study of Nailed Soil Slope Models: Effects of Building Foundation and Soil Characteristics." Applied Sciences 11, no. 16: 7735.

Journal article
Published: 10 August 2021 in Mathematics
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The study develops the displacement error recovery method in a mesh free environment for the finite element solution employing the radial point interpolation (RPI) technique. The RPI technique uses the radial basis functions (RBF), along with polynomials basis functions to interpolate the displacement fields in a node patch and recovers the error in displacement field. The global and local errors are quantified in both energy and L2 norms from the post-processed displacement field. The RPI technique considers multi-quadrics/gaussian/thin plate splint RBF in combination with linear basis function for displacement error recovery analysis. The elastic plate examples are analyzed to demonstrate the error convergence and effectivity of the RPI displacement recovery procedures employing mesh free and mesh dependent patches. The performance of a RPI-based error estimators is also compared with the mesh dependent least square based error estimator. The triangular and quadrilateral elements are used for the discretization of plates domains. It is verified that RBF with their shape parameters, choice of elements, and errors norms influence considerably on the RPI-based displacement error recovery of finite element solution. The numerical results show that the mesh free RPI-based displacement recovery technique is more effective and achieve target accuracy in adaptive analysis with the smaller number of elements as compared to mesh dependent RPI and mesh dependent least square. It is also concluded that proposed mesh free recovery technique may prove to be most suitable for error recovery and adaptive analysis of problems dealing with large domain changes and domain discontinuities.

ACS Style

Mohd. Ahmed; Devinder Singh; Saeed AlQadhi; Majed Alrefae. Mesh Free Radial Point Interpolation Based Displacement Recovery Techniques for Elastic Finite Element Analysis. Mathematics 2021, 9, 1900 .

AMA Style

Mohd. Ahmed, Devinder Singh, Saeed AlQadhi, Majed Alrefae. Mesh Free Radial Point Interpolation Based Displacement Recovery Techniques for Elastic Finite Element Analysis. Mathematics. 2021; 9 (16):1900.

Chicago/Turabian Style

Mohd. Ahmed; Devinder Singh; Saeed AlQadhi; Majed Alrefae. 2021. "Mesh Free Radial Point Interpolation Based Displacement Recovery Techniques for Elastic Finite Element Analysis." Mathematics 9, no. 16: 1900.

Journal article
Published: 12 July 2021 in Applied Sciences
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The pullout resistance and displacement performance of reinforcement have significant effects on the safe and economic design of a reinforced-soil system. In this study, the nail pullout tests are conducted to assess the pullout behavior of soil nail reinforcement at different levels in the soil slope of granular materials. The similitude laboratory models of a reinforced soil system with a scale of 1:10 are prepared. The construction sequence used in a full scale slope was precisely followed in the laboratory model. The models consist of a Perspex wall box filled with sand and steel bars as a reinforcement. The models of sand beds are formed using an automatic sand raining system. Devices and instruments are installed to record the nails pullout resistance and displacement. The tests are carried out at variable footing pressures to get the pullout force of the nails based on a strain control technique. The finite element models of nailed soil slope are also analyzed to validate the laboratory model results. It infers from the numerical model results that the laboratory models underestimate the pullout behavior of nail reinforcement in nailed soil slope. The pull-out force in nail reinforcement increases as the displacement increases and then decreases slightly and becomes constant with an increase in displacement in the case of deeper placed nails, but it becomes constant immediately for upper nails.

ACS Style

Mahmoud Mohamed; Mohd Ahmed; Javed Mallick. Pullout Behavior of Nail Reinforcement in Nailed Soil Slope. Applied Sciences 2021, 11, 6419 .

AMA Style

Mahmoud Mohamed, Mohd Ahmed, Javed Mallick. Pullout Behavior of Nail Reinforcement in Nailed Soil Slope. Applied Sciences. 2021; 11 (14):6419.

Chicago/Turabian Style

Mahmoud Mohamed; Mohd Ahmed; Javed Mallick. 2021. "Pullout Behavior of Nail Reinforcement in Nailed Soil Slope." Applied Sciences 11, no. 14: 6419.

Journal article
Published: 15 June 2021 in Sustainability
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The environmental and economic concerns pertaining to the construction industry have necessitated the development of sustainable concrete. Durability and strength are the two primary properties which determine the sustainability of concrete. This study evaluated the performance of self-cured concrete produced from local vesicular basalt porous aggregates. The durability indicators, porosity, permeability and pore size of the hardened concrete, were obtained from the water sorptivity (water permeability under capillary action) test, the water permeability under pressure action test and the Brunauer–Emmett–Teller (BET) surface area test and strength was evaluated in terms of compressive strength of concrete. The concrete specimens were produced with 10% porous vesicular basalt aggregate in replacement of coarse aggregate. The concrete specimens were tested at 3, 7 and 28 days. The self-curing effect on concrete strength was evaluated against water, air and membrane cured specimens, at surface/volume ratio of 26.4/40 and w/c ratio of 0.35/0.5. A 20% decrease in sorptivity coefficient, 10% increase in solid surface area and about 10% increase in compressive strength of the self-cured concrete was observed over the conventionally cured concrete. The study concludes that the addition of water-entrainment aggregates to concrete reduces water permeability, results in a finer pore structure of concrete and increases the quality and durability of concrete.

ACS Style

Mohd. Ahmed; Saeed AlQadhi; Saleh Alsulamy; Saiful Islam; Roohul Khan; Mohd. Danish. Development of Self-Cured Sustainable Concrete Using Local Water-Entrainment Aggregates of Vesicular Basalt. Sustainability 2021, 13, 6756 .

AMA Style

Mohd. Ahmed, Saeed AlQadhi, Saleh Alsulamy, Saiful Islam, Roohul Khan, Mohd. Danish. Development of Self-Cured Sustainable Concrete Using Local Water-Entrainment Aggregates of Vesicular Basalt. Sustainability. 2021; 13 (12):6756.

Chicago/Turabian Style

Mohd. Ahmed; Saeed AlQadhi; Saleh Alsulamy; Saiful Islam; Roohul Khan; Mohd. Danish. 2021. "Development of Self-Cured Sustainable Concrete Using Local Water-Entrainment Aggregates of Vesicular Basalt." Sustainability 13, no. 12: 6756.

Journal article
Published: 25 May 2021 in Applied Sciences
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The earth nailing system is a ground improvement technique used to stabilize earth slopes. The behavior of the earth nailing system is dependent on soil and nailing characteristics, such as the spacing between nails, the orientation, length, and method of installation of nails, soil properties, slope height and angle, and surcharge loading, among others. In the present study, a three-dimensional physical model was built to simulate a soil nailed slope with a model scale of 1:10 with various soil nail characteristics. The simulated models consist of Perspex strips as facing and steel bars as a reinforcing system to stabilize the soil slope. Sand beds in the model were formed, using a sand raining system. The performance of nailed soil slope models under three important nails characteristics, i.e., length, spacing and orientation, with varying surcharge loading were studied. It was observed that there is a reduction in the lateral movement of slope and footing settlements with an increase in length. It was found that the slope face horizontal pressure is non-linear with different nail characteristics. The increase in length and inclination of the soil nails decreased the vertical, horizontal stress and footing settlement, while the increase in spacing of the nails increased the vertical and horizontal stress behind the soil mass.

ACS Style

Mahmoud Mohamed; Mohd Ahmed; Javed Mallick; Pham Hoa. An Experimental Study of a Nailed Soil Slope: Effects of Surcharge Loading and Nails Characteristics. Applied Sciences 2021, 11, 4842 .

AMA Style

Mahmoud Mohamed, Mohd Ahmed, Javed Mallick, Pham Hoa. An Experimental Study of a Nailed Soil Slope: Effects of Surcharge Loading and Nails Characteristics. Applied Sciences. 2021; 11 (11):4842.

Chicago/Turabian Style

Mahmoud Mohamed; Mohd Ahmed; Javed Mallick; Pham Hoa. 2021. "An Experimental Study of a Nailed Soil Slope: Effects of Surcharge Loading and Nails Characteristics." Applied Sciences 11, no. 11: 4842.

Journal article
Published: 06 January 2021 in Sustainability
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Disastrous natural hazards, such as landslides, floods, and forest fires cause a serious threat to natural resources, assets and human lives. Consequently, landslide risk assessment has become requisite for managing the resources in future. This study was designed to develop four ensemble metaheuristic machine learning algorithms, such as grey wolf optimized based artificial neural network (GW-ANN), grey wolf optimized based random forest (GW-RF), particle swarm optimization optimized based ANN (PSO-ANN), and PSO optimized based RF for modeling rainfall-induced landslide susceptibility (LS) in Aqabat Al-Sulbat, Asir region, Saudi Arabia, which observes landslide frequently. To obtain very high precision and robust prediction from machine learning algorithms, the grey wolf and PSO optimization algorithms were integrated to develop new ensemble machine learning techniques. Subsequently, LS maps produced by training dataset were validated using the receiver operating characteristics (ROC) curve based on the testing dataset. Based on the area under curve (AUC) value of ROC curve, the best method for LS modeling was selected. We developed ROC curve-based sensitivity analysis to investigate the influence of the parameters for LS modeling. The Gumble extreme value distribution was employed to estimate the rainfall at 2, 5, 10, 20, 50, and 100 year return periods. Then, the landslide hazard maps were prepared at different return periods by integrating the best LS model and estimated rainfall at different return periods. The theory of danger pixels was employed to prepare a final risk assessment of the resources, which have been exposed to the landslide. The results showed that 27–42 and 6–15 km2 were predicted as the very high and high LS zones using four ensemble metaheuristic machine learning algorithms. Based on the area under curve (AUC) of ROC, GR-ANN (AUC-0.905) appeared as the best model for LS modeling. The areas under high and very high landslide hazard were gradually increased over the progression of time (26 km2 at the 2 year return period and 40 km2 at the 100 year return period for the high landslide hazard zone, and 6 km2 at the 2 year return period and 20 km2 at the 100 year return period for the very high landslide hazard zone). Similarly, the areas of danger pixel also increased gradually from the 2 to 100 year return periods (37 km2 to 62 km2). Various natural resources, such as scrubland, built up, and sparse vegetation, were identified under risk zone due to landslide hazards. In addition, these resources would be exposed extensively to landslides over the advancement of return periods. Therefore, the outcome of the present study will help planners and scientists to propose high precision management plans for protecting natural resources, which have been exposed to landslides.

ACS Style

Javed Mallick; Saeed Alqadhi; Swapan Talukdar; Majed AlSubih; Mohd. Ahmed; Roohul Khan; Nabil Kahla; Saud Abutayeh. Risk Assessment of Resources Exposed to Rainfall Induced Landslide with the Development of GIS and RS Based Ensemble Metaheuristic Machine Learning Algorithms. Sustainability 2021, 13, 457 .

AMA Style

Javed Mallick, Saeed Alqadhi, Swapan Talukdar, Majed AlSubih, Mohd. Ahmed, Roohul Khan, Nabil Kahla, Saud Abutayeh. Risk Assessment of Resources Exposed to Rainfall Induced Landslide with the Development of GIS and RS Based Ensemble Metaheuristic Machine Learning Algorithms. Sustainability. 2021; 13 (2):457.

Chicago/Turabian Style

Javed Mallick; Saeed Alqadhi; Swapan Talukdar; Majed AlSubih; Mohd. Ahmed; Roohul Khan; Nabil Kahla; Saud Abutayeh. 2021. "Risk Assessment of Resources Exposed to Rainfall Induced Landslide with the Development of GIS and RS Based Ensemble Metaheuristic Machine Learning Algorithms." Sustainability 13, no. 2: 457.

Original paper
Published: 13 November 2020 in Theoretical and Applied Climatology
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The present study is designed to analyse the annual rainfall variability and trend in 30 meteorological stations of the Asir region for the period of 1970–2017 using the Mann-Kendall (MK) test, Modified Mann-Kendall (MMK) test, trend free pre-whitening Mann-Kendall (TFPW MK) test, and the innovative trend analysis (ITA). A comparative study among the trend detection techniques was performed using the correlation coefficient. The future rainfall trend based on the historical rainfall pattern was investigated by using detrended fluctuation analysis (DFA). Results of the MK test showed that 20 stations in the study area observed a negative trend, and out of these, nine stations had significant negative trends at the significance level of 0.01. The findings of the MMK test showed that 23 stations recorded negative trends, and out of these, 18 stations had significant negative trends at the significance level of 0.01. Based on the findings of the TFPW-MK test, 21 stations observed a negative trend, and among these, 10 stations had significant negative trends at the significance of 0.01. ITA detected 25 stations observing a negative trend, and out of these, 18 stations had significant negative trends at the significance level of 0.01. Based on the findings of the tests and their performance, the MMK test appeared as the best performing technique among the MK test family, while ITA appeared as the best trend detection technique among the four techniques because it outperformed (p < 0.01) the others. Results of DFA showed that 23 stations (10 were significant) had recorded declining future rainfall trends based on past trends. The results of the present study would help the planners and policy makers to make accurate and easy decisions on irrigation, climatic, and water resource management in the Asir region of Saudi Arabia.

ACS Style

Javed Mallick; Swapan Talukdar; Majed Alsubih; Roquia Salam; Mohd Ahmed; Nabil Ben Kahla; Shamimuzzaman. Analysing the trend of rainfall in Asir region of Saudi Arabia using the family of Mann-Kendall tests, innovative trend analysis, and detrended fluctuation analysis. Theoretical and Applied Climatology 2020, 143, 823 -841.

AMA Style

Javed Mallick, Swapan Talukdar, Majed Alsubih, Roquia Salam, Mohd Ahmed, Nabil Ben Kahla, Shamimuzzaman. Analysing the trend of rainfall in Asir region of Saudi Arabia using the family of Mann-Kendall tests, innovative trend analysis, and detrended fluctuation analysis. Theoretical and Applied Climatology. 2020; 143 (1-2):823-841.

Chicago/Turabian Style

Javed Mallick; Swapan Talukdar; Majed Alsubih; Roquia Salam; Mohd Ahmed; Nabil Ben Kahla; Shamimuzzaman. 2020. "Analysing the trend of rainfall in Asir region of Saudi Arabia using the family of Mann-Kendall tests, innovative trend analysis, and detrended fluctuation analysis." Theoretical and Applied Climatology 143, no. 1-2: 823-841.

Journal article
Published: 01 October 2020 in Sustainability
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The development of a concrete mixture design process for high-quality concrete production with sustainable values is a complex process because of the multiple required properties at the green/hardened state of concrete and the interdependency of concrete mixture parameters. A new multicriteria decision making (MCDM) technique based on Technique of Order Preference Similarity to the Ideal Solution (TOPSIS) methodology is applied to a fuzzy setting for the selection of concrete mix factors and concrete mixture design methods with the aim towards sustainable concrete quality management. Three objective properties for sustainable quality concrete are adopted as criteria in the proposed MCDM model. The seven most dominant concrete mixture parameters with consideration to sustainable concrete quality issues, i.e., environmental (density, durability) and socioeconomic criteria (cost, optimum mixture ingredients ratios), are proposed as sub-criteria. Three mixture design techniques that have potentiality to include sustainable aspects in their design procedure, two advanced and one conventional concrete mixture design method, are taken as alternatives in the MCDM model. The proposed selection support framework may be utilized in updating concrete design methods for sustainability and in deciding the most dominant concrete mix factors that can provide sustainable quality management in concrete production as well as in concrete construction. The concrete mix factors found to be most influential to produce sustainable concrete quality include the water/cement ratio and density. The outcomes of the proposed MCDM model of fuzzy TOPSIS are consistent with the published literature and theory. The DOE method was found to be more suitable in sustainable concrete quality management considering its applicable objective quality properties and concrete mix factors.

ACS Style

Mohd. Ahmed; Javed Mallick; Saeed AlQadhi; Nabil Ben Kahla. Development of Concrete Mixture Design Process Using MCDM Approach for Sustainable Concrete Quality Management. Sustainability 2020, 12, 8110 .

AMA Style

Mohd. Ahmed, Javed Mallick, Saeed AlQadhi, Nabil Ben Kahla. Development of Concrete Mixture Design Process Using MCDM Approach for Sustainable Concrete Quality Management. Sustainability. 2020; 12 (19):8110.

Chicago/Turabian Style

Mohd. Ahmed; Javed Mallick; Saeed AlQadhi; Nabil Ben Kahla. 2020. "Development of Concrete Mixture Design Process Using MCDM Approach for Sustainable Concrete Quality Management." Sustainability 12, no. 19: 8110.

Review
Published: 28 September 2020 in Applied Sciences
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The penetration to geological shield occurs in many situations at various velocities and scales, for example, meteor-cratering, pile driving, falling of objects from high-rise building construction, and debris/fragments from failed components. The soil media is an efficient energy dissipation system and effective shock protection shield. Impact circumstances are currently getting widespread attention. A lot of research has been done on soil media for impact and penetration. The phenomenon of dynamic penetration in heterogeneous particulate soil medium is very complex and the target soil media under dynamic impact especially under high speed and deep penetration neither behave completely as solid nor as liquid. The topics of recent research interest in the field of penetration to soil media and their significant findings are critically reviewed in the present study. The dedicated review of analytical, empirical, experimental, and computational methods to predict the response of soils media-impacting objects to penetration is presented. The emerging challenges in fundamental research of penetration into soil media are outlined and it is an attempt to formulate the future research directions in the field of soil media penetration.

ACS Style

Mohd. Ahmed; Saeed Alqadhi; Javed Mallick; Mohammed Noor Desmukh; Hoang Thi Hang. Advances in Projectile Penetration Mechanism in Soil Media. Applied Sciences 2020, 10, 6810 .

AMA Style

Mohd. Ahmed, Saeed Alqadhi, Javed Mallick, Mohammed Noor Desmukh, Hoang Thi Hang. Advances in Projectile Penetration Mechanism in Soil Media. Applied Sciences. 2020; 10 (19):6810.

Chicago/Turabian Style

Mohd. Ahmed; Saeed Alqadhi; Javed Mallick; Mohammed Noor Desmukh; Hoang Thi Hang. 2020. "Advances in Projectile Penetration Mechanism in Soil Media." Applied Sciences 10, no. 19: 6810.

Journal article
Published: 16 December 2019 in Water
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Saudi Arabia’s arid and semi-arid regions suffer from water scarcity because of climatic constraints and rapid growth of domestic and industrial water uses. The growing demand for high-quality water supplies and to reduce the dependency on desalination creates an urgent need to explore groundwater resources as an alternative. The weighted overlay analysis method using the fuzzy-analytical hierarchy process (FAHP) multi-criteria decision making (MCDM) techniques combined with geoinformation technology was used in this study to explore the groundwater potential zones in the Itwad-Khamis watershed of Saudi Arabia. Twelve thematic layers were prepared and processed in a GIS setting to produce the groundwater potential zone map (GPZM). Subsequently, potential groundwater areas were delineated and drawn into five classes: very good potential, good potential, moderate potential, poor potential, and very poor potential. The estimated GWPZ (groundwater potential zones) was validated by analyzing the existing open wells distribution and the yield data of selected wells within the studied watershed. With this quality-based zoning, it was found that 82% of existing wells were located in a very good and good potential area. The statistical analysis showed that 14.6% and 28.8% of the total area were under very good and good, while 27.3% and 20.2% were accounted for the moderate and poor potential zone, respectively. To achieve sustainable groundwater management in the Aseer region, Saudi Arabia, this research provided a primary estimate and significant insights for local water managers and authorities by providing groundwater potential zone map.

ACS Style

Javed Mallick; Roohul Abad Khan; Mohd Ahmed; Saeed Dhafer Alqadhi; Majed Alsubih; Ibrahim Falqi; Mohd Abul Hasan. Modeling Groundwater Potential Zone in a Semi-Arid Region of Aseer Using Fuzzy-AHP and Geoinformation Techniques. Water 2019, 11, 2656 .

AMA Style

Javed Mallick, Roohul Abad Khan, Mohd Ahmed, Saeed Dhafer Alqadhi, Majed Alsubih, Ibrahim Falqi, Mohd Abul Hasan. Modeling Groundwater Potential Zone in a Semi-Arid Region of Aseer Using Fuzzy-AHP and Geoinformation Techniques. Water. 2019; 11 (12):2656.

Chicago/Turabian Style

Javed Mallick; Roohul Abad Khan; Mohd Ahmed; Saeed Dhafer Alqadhi; Majed Alsubih; Ibrahim Falqi; Mohd Abul Hasan. 2019. "Modeling Groundwater Potential Zone in a Semi-Arid Region of Aseer Using Fuzzy-AHP and Geoinformation Techniques." Water 11, no. 12: 2656.

Journal article
Published: 31 October 2019 in Periodica Polytechnica Civil Engineering
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Large number of active vibration control systems existing in the literature has brought lot of confusion for engineers and junior researchers. This study deals with the comparison of different active control systems of a 20-storey building under seismic excitation for three control devices: Active Mass Damper (AMD), Active Bracing System (ABS) and Connected Building Control (CBC). Two different control configurations are considered to add active damping to the building. The first one employs force actuator and displacement sensor and is examined with first and second order Positive Position Feedback, Lead compensators and Direct Velocity Feedback. The second configuration employs a displacement actuator collocated with a force sensor and an Integral Force Feedback control law. A total number of 15 control cases are compared from the point of view of stability, robustness, performance and control effort.

ACS Style

Mohamed Hechmi El Ouni; Nabil Ben Kahla; Mohd Ahmed; Saiful Islam; Hamdi Ayed; Khalid Mohamed Khedher. Comparative Study of Different Active Control Systems of High Rise Buildings under Seismic Excitation. Periodica Polytechnica Civil Engineering 2019, 1 .

AMA Style

Mohamed Hechmi El Ouni, Nabil Ben Kahla, Mohd Ahmed, Saiful Islam, Hamdi Ayed, Khalid Mohamed Khedher. Comparative Study of Different Active Control Systems of High Rise Buildings under Seismic Excitation. Periodica Polytechnica Civil Engineering. 2019; ():1.

Chicago/Turabian Style

Mohamed Hechmi El Ouni; Nabil Ben Kahla; Mohd Ahmed; Saiful Islam; Hamdi Ayed; Khalid Mohamed Khedher. 2019. "Comparative Study of Different Active Control Systems of High Rise Buildings under Seismic Excitation." Periodica Polytechnica Civil Engineering , no. : 1.

Research article civil engineering
Published: 04 October 2019 in Arabian Journal for Science and Engineering
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The mesh-free interpolation method-based recovery of finite element discretization error is presented in this study. Two interpolation schemes, namely radial point interpolation method and moving least squares method, are taken for the recovery of finite element solution error. The global and elemental errors of finite element solution are evaluated in energy norm. The two-dimensional benchmark elastic problems are analysed using triangular/quadrilateral meshing schemes to prove the proposed mesh-free error estimation techniques validity and the effectiveness. The results of the mesh-less interpolation recovery-based error estimation are also compared with mesh-dependent least squares interpolation method-based error estimation. The mesh-free recovery is based on the fitting of a higher-order polynomial to the field variable over a mesh-less patch (radial support domain) using RPI and MLS interpolation method, while the mesh-dependent recovery is based on recovery of the field variable over a patch of nodes surrounding the particular given node using RPI, MLS and LS interpolation method. The study presents the effect of polynomial basis function (LS), polynomial basis function along with radial basis function (RPI)-based interpolation method and weighted polynomial basis function (MLS) on the recovery of finite element solution error. The quality of error estimation under different interpolation schemes is compared in terms of convergence characteristics, local/global effectivity, error distribution patterns and adaptively refined meshes. It can be concluded that weighting function of least squares interpolation affects considerably the mesh-free error estimation.

ACS Style

Mohd. Ahmed. A Comparative Study of Mesh-Free Radial Point Interpolation Method and Moving Least Squares Method-Based Error Estimation in Elastic Finite Element Analysis. Arabian Journal for Science and Engineering 2019, 45, 3541 -3557.

AMA Style

Mohd. Ahmed. A Comparative Study of Mesh-Free Radial Point Interpolation Method and Moving Least Squares Method-Based Error Estimation in Elastic Finite Element Analysis. Arabian Journal for Science and Engineering. 2019; 45 (5):3541-3557.

Chicago/Turabian Style

Mohd. Ahmed. 2019. "A Comparative Study of Mesh-Free Radial Point Interpolation Method and Moving Least Squares Method-Based Error Estimation in Elastic Finite Element Analysis." Arabian Journal for Science and Engineering 45, no. 5: 3541-3557.

Journal article
Published: 21 August 2019 in Applied Sciences
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Concrete manufacturing, a high energy and natural resources demanding process, can play a vital role in sustainable development by offering solutions to environmental and socio-economic issues. Concrete manufactured with siliceous materials can extend concrete life and reduce costs, and judicious management of siliceous utilization can make concrete manufacturing sustainable. A number of industrial and agro-based by-products, waste products, and new engineered materials are being use as siliceous material in concrete. The present research aims to implement the Fuzzy Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) approach, a Multi-Criteria Decision Making (MCDM) technique, for the orderly management of siliceous materials based on sustainable criteria, namely, technical, environmental, social, and economic aspects. The present research adopts twenty indicators of sustainability to evolve a comprehensive model for a sustainability ranking of concrete siliceous materials and to provide siliceous materials management. The present research also provides a methodology for the systematic ranking of sustainable criteria and indicators along with a siliceous materials sustainability order for enhanced sustainable development and management. It can be concluded that the proper material management of siliceous concrete materials, especially nano-engineered materials in construction industry, will help in the conservation of basic concrete materials and environmental protection without direct impact on social development.

ACS Style

Ibrahim I. Falqi; Mohd Ahmed; Javed Mallick. Siliceous Concrete Materials Management for Sustainability Using Fuzzy-TOPSIS Approach. Applied Sciences 2019, 9, 3457 .

AMA Style

Ibrahim I. Falqi, Mohd Ahmed, Javed Mallick. Siliceous Concrete Materials Management for Sustainability Using Fuzzy-TOPSIS Approach. Applied Sciences. 2019; 9 (17):3457.

Chicago/Turabian Style

Ibrahim I. Falqi; Mohd Ahmed; Javed Mallick. 2019. "Siliceous Concrete Materials Management for Sustainability Using Fuzzy-TOPSIS Approach." Applied Sciences 9, no. 17: 3457.