Rock Slope Stability Analysis in the Left Abutment of Bakhtiary Dam, Iran
Mohsen
Fallahi
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
Masoud
Cheraghi Seifabad
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
Alireza
Baghbanan
Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran
author
text
article
2021
eng
In this research, directions of in-situ stresses in the rock slope in the left abutment of Bakhtiary dam (Center of Iran) are defined taking advantage of geological history, tectonic evolution of the area, and in-situ tests. To that end, the study draws on the kinematic analysis, limit equilibrium and numerical methods. It is of note that there is no possibility for toppling failure if kinematic analysis is used to study the stability in left abutment of Bakhtiary dam. The plane failure analysis indicated that there is a possibility of failure in the middle and upper walls based on joint set J1. Also, from geological perspective, wedge failure in the middle and upper walls is possible due to the intersection of bedding planes and Joint set J1. In the analysis of the slope stability using limit equilibrium, the least value of the safety factor obtained for plane failure belongs to joint set J1 in the upper wall, indicating that the left abutment is stable. Numerical analysis indicated that this slope needs support requirements.
Computational Engineering and Physical Modeling
Pouyan Press
2588-6959
4
v.
2
no.
2021
1
19
https://www.jcepm.com/article_122692_dffe8a7c1c80a364fe1702aeb075aa15.pdf
dx.doi.org/10.22115/cepm.2021.254912.1134
Prefabricated Composite Beams Based on Innovative Shear Connection
Vincent
Kvocak
Department of Civil Engineering, Technical University of Kosice, Kosice, Slovakia
author
Daniel
Dubecky
Department of Civil Engineering, Technical University of Kosice, Kosice, Slovakia
author
Patricia
Vanova
Department of Civil Engineering, Technical University of Kosice, Kosice, Slovakia
author
text
article
2021
eng
Composite structures, especially steel-concrete composites have a great potential of use in the building industry. A correct combination of materials and elimination of disadvantages of used material may lead to significant savings in aspects like the amount of material used, and time needed for construction. Also cost reduction while using composite structure instead of the structure fabricated only from one material should be mentioned. The paper focuses on the design of alternative solutions for composite steel-concrete structures with encased steel beams. Simultaneously, a design model was developed using the Abaqus software environment. The exact physical properties of the individual materials were verified by experiment. Tensile strength of steel, compressive strength of concrete, bending strength of concrete in tension, and splitting tensile strength were determined along with the modulus of elasticity of concrete in compression. The correctness of the design model applied by means of the Abaqus program was experimentally verified.
Computational Engineering and Physical Modeling
Pouyan Press
2588-6959
4
v.
2
no.
2021
20
26
https://www.jcepm.com/article_122690_db2e3f89cd6afaddb2f8287a8c7175f6.pdf
dx.doi.org/10.22115/cepm.2021.233573.1109
Contribution of the Blast Furnace Slag on the Behavior of HPC in a Hydrochloric Environment
Rabah
Chaid
Research Unit, Materials, Processes and Environment, Boumerdes University, Algeria
author
Habib-Abdelhak
Mesbah
Civil Engineering and Mechanical Engineering Materials Laboratory, IUT-Rennes, French
author
Naima
Haddadou
Department of Architecture, University of Algiers, Algeria
author
Malika-Sabria
Hamza
Research Unit, Materials, Processes and Environment, Boumerdes University, Algeria
author
text
article
2021
eng
Most mechanical properties and durability of cementitious materials are related to the performance of the hydrated cement that coats the granular skeleton. However, different mineral additions are currently used in concrete. They are used as addition or substitution to cement. The use of these supplementary cementitious materials provides to concrete a denser matrix that will be more resistant to aggressive environments such as sulphates, chlorides and other aggressive agents. In mixtures containing finely ground of slag, 15% of cement by weight was replaced with finely ground of slag of El-Hadjar (Algeria). The main objective of this study is to investigate the effect of curing in the hydrochloric environment by subjugating its granular effect on the performance of concrete. Density, compressive strength, concrete surface, internal microstructure and ultrasonic pulse velocity were investigated in this research. The damage mechanisms of concrete have been related to the development of the microstructure of the material. The degradations were observed using a scanning electron microscope (SEM) and quantified by x-ray diffraction (XRD). The microstructural study concerns both the surface layer and the internal structure of the samples. The results have shown that slag of El-Hadjar present a pozzolanic activity and hence it affects favorably the microstructure of the paste which becomes denser and less permeable.
Computational Engineering and Physical Modeling
Pouyan Press
2588-6959
4
v.
2
no.
2021
27
38
https://www.jcepm.com/article_122694_7d8f705cd0756aa472bc8ea415c6bf1b.pdf
dx.doi.org/10.22115/cepm.2021.233313.1108
Improvement of Concrete Characterization Using Nanosilica
Esmail
Shahrokhinasab
Graduate Research Assistant, Department of Civil and Environmental Engineering, Florida International University, United States
author
Francisco
Chitty
Graduate Research Assistant, Department of Civil and Environmental Engineering, Florida International University, United States
author
Masood
Vahedi
Department of Civil and Environmental Engineering, University of Nevada, Reno, United States of America
author
Sina
Zolfagharysaravi
M.Sc. Graduated, K.N. Toosi University of Technology, Tehran, Iran
author
text
article
2021
eng
In recent years, different research works have been conducted to evaluate the addition of nanometer materials to concrete materials. In this paper, the influence of Nanosilica on compressive strength, abrasive strength, durability, and improvements in the micro-structure of concrete are discussed. The results showed that the compressive strength of concrete samples with Nanosilica and silica fume were higher than the compressive strength of other samples without nanometer materials in all ages, as well as increasing the dosage percentage of Nanosilica led to higher levels of compressive strength. In the mix designs with an equal dosage percentage, samples containing Nanosilica have shown a higher level of strength in comparison to samples containing silica fume. The application of Nanosilica in self-compacting concrete resulted in higher level of compressive strength, flexural strength, abrasive strength, elasticity module, ultrasonic waves permeability velocity (UPV), and lower water absorption compared to samples without Nanoparticles. Despite the evidences which show the improvement in mechanical characteristics of concretes with Nanosilica-particles, further developments for the applicability of Nanoparticles for improving the characteristics of concrete require the right knowledge and higher control over the effective mechanisms of Nanoparticles on concrete’s structure.
Computational Engineering and Physical Modeling
Pouyan Press
2588-6959
4
v.
2
no.
2021
39
52
https://www.jcepm.com/article_126113_38d741146ba1924b300fa4dad29549eb.pdf
dx.doi.org/10.22115/cepm.2021.250011.1133
Identifying the Amount of Heat Flux and Thermal Conduction through Fabrics with Appropriate Heat Equation
Shariful
Islam
Department of Textile Engineering, Faculty of Science and Engineering, City University, Dhaka, Bangladesh
author
Shaikh Md
Mominul Alam
Department of Textile Machinery Design and Maintenance, Faculty of Science and Engineering, Bangladesh University of Textiles, Tejgaon, Dhaka 1208, Bangladesh
author
Shilpi
Akter
Department of Fabric Engineering, Faculty of Textile Engineering, Bangladesh University of Textiles, Tejgaon, Dhaka 1208, Bangladesh
author
text
article
2021
eng
Heat equations such as heat flux and thermal conduction were applied in this paper so that these values were obtained during heat setting. Cotton spandex woven fabrics have the properties of stretch ability like stretch, growth, elasticity etc. Due to controlling such types of properties heat setting is mandatory. The values of heat flux and thermal conduction would be beneficial to heat application the fabrics more accurately. A heavy weight stretched woven fabric of twill weave was used in this research. The width of the fabric was 60 inch and had a thickness of 2.5 millimeter. Fabric was heated in a stenter machine with adjusted industrial settings. Heat flux values and thermal conduction values of the clothes were investigated using equations stated in this paper. Overheat can damage the fabrics drastically and all the comfort properties are also influenced seriously. Using heat flux equation and thermal conduction equation, fabrics are heated preciously and all these things are practically analyzed, examined and investigated in this research. This research is trial based and the findings are useful to the employees functioning in textile factories who are in duty of heat setting the cotton spandex woven fabrics and to controlling of their all comfort characteristics.
Computational Engineering and Physical Modeling
Pouyan Press
2588-6959
4
v.
2
no.
2021
53
67
https://www.jcepm.com/article_126114_133beddb108b647d1d7fdada449c8072.pdf
dx.doi.org/10.22115/cepm.2021.239419.1118
Influence of Jeffrey Nanofluid on Peristaltic Motion in an Inclined Endoscope
Asha
Kotnurkar
Department of Studies and Research in Mathematics, Karnatak University, Dharwad, 580003, India
author
Vijaylaxmi
Talawar
Department of Studies and Research in Mathematics, Karnatak University, Dharwad, 580003, India
author
text
article
2021
eng
Influence of Jeffrey nanofluid on Peristaltic motion in an Inclined Endoscope where the small intestine, large intestine, or other tracts of the human anatomy are in a cylindrical fashion. Hence in the present paper, we have considered the cylindrical coordinate system. In the gap between two coaxial inclined tubes, we have considered the incompressible non-Newtonian Jeffrey nanofluid. On the assumption of long wavelength and low Reynolds number, the governing equations were investigated. Using the Homotopy Perturbation Technique, coupled equations were solved with the temperature profile and nanoparticle phenomena. Using this present technique, the closed-form solutions of velocity, pressure raise, time-average volume flow rate have been calculated. The important result of this study is that the influence of Jeffrey nanofluid and inclination angle increases the velocity profile. Due to increase in the radius of the inner tube, the velocity of the fluid diminishes. The influence of different physical parameters on temperature, the concentration of nanoparticles, velocity, pressure rise,and frictional force of inner and outer tubes were graphically represented.
Computational Engineering and Physical Modeling
Pouyan Press
2588-6959
4
v.
2
no.
2021
68
94
https://www.jcepm.com/article_129546_c509ee0e126d9ed58de2e636bfef6a35.pdf
dx.doi.org/10.22115/cepm.2021.261607.1142