2024-03-29T19:14:02Z
https://www.jcepm.com/?_action=export&rf=summon&issue=13091
Computational Engineering and Physical Modeling
Comput. Eng. Phys. Model.
2019
2
3
Evaluation of Limit Equilibrium and Finite Element Methods in Slope Stability Analysis - Case Study of Zaremroud Landslide, Iran
Ahad
Bagherzadeh Khalkhali
Mohsen
Kabiri Koochaksaraei
The events that result from slope instability that causes a mass of soil to move downward from an earth slope (landslides) are studied in this research. The most important factors of slope instability are the force of gravity and the presence of water, which cause soil erosion at the surface and increase pore pressure at greater depths, thereby reducing soil strength. Iran, with mainly mountainous topography, tectonic activities, high seismicity, and diverse geological and climatic conditions, has the susceptible to landslides. Therefore, the analysis of slope stability and its safety evaluation is crucial in this region. Choosing the right method for sustainability analysis, which is one of the engineers' challenges in estimating the sustainability of a slope, depends on the project conditions and the inherent limitations of each method. This paper presents a case study of the stability analysis of a soil slope using limit equilibrium and finite element methods in Zararmood region in Mazandaran Province of Iran. The results show that the safety factor calculated by the finite element method is about 3% lower than the limit equilibrium method which is negligible due to the simplicity of calculations in the limit equilibrium method.
Landslide
slope stability
Limit equilibrium
Finite Element
Numerical method
2019
07
01
1
15
https://www.jcepm.com/article_96443_a603065d783be4388162d44cd8fa2026.pdf
Computational Engineering and Physical Modeling
Comput. Eng. Phys. Model.
2019
2
3
Numerical Simulation and Parametric Study on the Moment Capacity of Composite Beam
Mousa
Alqarni
Ahmad
Noman
Muhammad Aun
Bashir
Response of structural components like beams have been studied by different methods. One of the methods which is widely used is experimental testing. But since it provides actual response, it can be quite costly and time consuming. However, finite element analysis has been used a lot due to capabilities of computer hardware and software. The use of software to model structural components is cost effective and much faster. In this study, ABAQUS was used for numerical simulation of a concrete filled steel tube (CFST) beam and the effect of width/thickness ratio, yield strength of steel tube, compressive strength of concrete and the stiffness on the moment capacity of the CFST beam were studied. The simulation shows good agreement with the experimental results. After validation of simulation, the parametric study on the moment strength of the beam was carried out to predict the simple equations for maximum moment capacity of CFST beam. It was observed that the capacity of the beam was governed by the steel tube strength.
Hollow steel beam
Steel beam filled with concrete
numerical simulation
Moment strength
parametric analysis
2019
07
01
16
26
https://www.jcepm.com/article_96307_5af920b2dc11968a80a7167317322e44.pdf
Computational Engineering and Physical Modeling
Comput. Eng. Phys. Model.
2019
2
3
Chemical Composition of Commonly Used Local and Foreign Steel Reinforcements and the Effects on the Strength Property of the Material Composites
Audu
Taiwo
Emmanuel
Ndububa
Kolade
Olarewaju
In recent times, structural failure of buildings and civil infrastructures are on the increase in developing countries. These failures can be attributed to the use of; poor material, influx of quacks, unethical professional practices, poor construction methodology and the use of unverified newly introduced reinforcements. This study investigated the chemical contents of commonly used new local steel reinforcements and imported steel reinforcements as to the level of compliance with ASTM A 706 and BS 4449 specifications. The effects of the percentage composition on the strength properties of the material and consequential effects on concrete composite were discussed. Chemical analyses of local bars revealed higher sulphur and phosphorus contents which increased brittleness though with enhanced strength. The higher contents of minor elements like silicon, Manganese, Chromium, Zinc in local steel specimens increased loss of mass in aqueous solutions and in water compared with the foreign specimens. In conclusion, while the imported bars satisfied the ASTM and BS standards in terms of the percentage composition of the elements, local bars did not meet these standards. Hence, it is recommended that the development of National Building Codes that reflect the actual material characteristics to avert premature failure for concrete structures reinforced with the local bars.
Chemical composition
Steel reinforcement
Local
Imported
Strength
2019
07
01
27
37
https://www.jcepm.com/article_96019_59c0310ead2d448588cc12a4952acdba.pdf
Computational Engineering and Physical Modeling
Comput. Eng. Phys. Model.
2019
2
3
Human Comfort Assessment of Buildings Considering the Effect of the Masonry Infills and the Soil-Structure Interaction
Jean Carlos
Mota Silva
Leonardo
Bastos
Jose Guilherme
Santos da Silva
The increase in slenderness of building projects has been crucial for reducing the natural frequency values, causing excessive vibration problems. Two other important aspects, generally disregarded in the current design practice are related to the effects of the masonry infills and the soil-structure interaction. This research work aims to develop an analysis methodology to evaluate the human comfort of buildings subjected to the wind nondeterministic dynamic actions. This way, the dynamic behavior of a 16-storey reinforced concrete building, 48 m high and dimensions of 15.0 m by 14.2 m is investigated. Numerical models with different characteristics were developed to obtain a more realistic representation of the system, based on the Finite Element Method (FEM), through the use of the ANSYS program. The results have indicated relevant quantitative differences when the dynamic structural response of the building was analysed, such as the significant reduction on the horizontal translational displacements and peak acceleration values, when the effects of the masonry infills and the soil-structure interaction were considered.
Buildings
Masonry Infills
Human Comfort Assessment
Soil-structure interaction
Finite element modelling
2019
07
01
38
52
https://www.jcepm.com/article_101886_502a2fb0233ff0d19552ef51ed808f4f.pdf
Computational Engineering and Physical Modeling
Comput. Eng. Phys. Model.
2019
2
3
Modelling Effects of Land Use Changes on Traffic Based on Proposed Traffic Simulator
Mostafa
Jabbari
Saeed
Behzadi
In this paper, a traffic simulator is designed in order to investigate the travel demand based on GIS data and analysis. In order to evaluate the proposed simulator, four different scenarios are provided for the arrangement of land use services. In first scenario, all service land use are located in the middle of the region; in second scenario, land use services located on the periphery of the region; in the third scenario, land use is defined regularly in the entire area; and finally, in the last scenario, unchanged statuses are evaluated. The comparison parameters are Vehicle Miles of Travel (VMT) and Vehicle Hours of Travel (VHT), which are measured for these four scenarios. The analysis of the results shows that the regular distribution of land use service (scenario 3), with VHT, mean of 33.01 minutes is the best scenario, while scenario 2 with a VHT average of 35.12 minutes has the worst performance.
Land Use Change
Traffic
Traffic simulator
Geospatial Information Systems
2019
07
01
53
64
https://www.jcepm.com/article_101887_f34aacacd4f26ced2a8a2e6ea1909ae7.pdf