Original Research Paper
Architecture
A. Davaran; J. Hassanzade; N. Tolouei Molan; M.J Rafizadeh
Abstract
In this paper, the nonlinear-non-elastic behavior of the braced frames of the SCBF Special Center is compared with the BRBF anti-arc bracing brackets. Different structures with different numbers of floors, which were previously designed according to the existing regulations and the recommended behavior ...
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In this paper, the nonlinear-non-elastic behavior of the braced frames of the SCBF Special Center is compared with the BRBF anti-arc bracing brackets. Different structures with different numbers of floors, which were previously designed according to the existing regulations and the recommended behavior coefficient, were non-linear static analysis by OPENSEES software and their load-bearing and cyclic behavior were determined for both types of braces. The effect of stiffness strain percentage and the degree of initial geometric defect of the brace on the behavior of the structures were also investigated. Comparison of results indicates more formable and stable behavior of anti-buckling brace than normal brace. Also, the effect of primary geometric defect is significant only in the initial steps of displacement and the higher the percentage of strain strain strain, the more stable behavior structure against larger forces. it shows.
Original Research Paper
Architecture
S.A. Mir Bagheri; S. Boudaghpour; S.A. Hashemi Monfared
Abstract
Erosion and sedimentation phenomena have many destructive effects on the environment and human life. One of their most important effects is to reduce the volume of dam reservoirs. When the tank can no longer perform the intended service, its useful life is over. So far, several models have been proposed ...
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Erosion and sedimentation phenomena have many destructive effects on the environment and human life. One of their most important effects is to reduce the volume of dam reservoirs. When the tank can no longer perform the intended service, its useful life is over. So far, several models have been proposed to simulate the entry of sediment into the tank, most of which are based on laboratory observations. In this article, Ekbatan Dam has been selected as a case study. First, using the flow profile measurements in the main river, the inlet sediment connection equation to the reservoir is solved. Then, using the sediment continuity equation and four different transfer equations, the amount of precipitation effective in reducing the life of the tank is obtained. These values have been used to calculate the reduction in reservoir volume over a 50-year period, indicating that the Anglo-Hansen method was more consistent with the actual reservoir conditions than other equations. Finally, according to the final equilibrium conditions, the floor profile of the tank is obtained. The results show that after this period, a lot of sediment has accumulated at the foot of the dam and an increase of up to 15 meters has been created.Send
Original Research Paper
Architecture
R. Morshed; A. Eslami
Abstract
According to pre-2002 editions of the ACI 318 Regulations, in normal bending sections, it is not necessary to use a compression reinforcement before reaching the maximum tensile reinforcement and it is not necessary to use it to help the bending strength of the non-economical section. By changing the ...
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According to pre-2002 editions of the ACI 318 Regulations, in normal bending sections, it is not necessary to use a compression reinforcement before reaching the maximum tensile reinforcement and it is not necessary to use it to help the bending strength of the non-economical section. By changing the way the flexural strength reduction coefficient is determined since the 2002 editions, this coefficient is reduced for sections that are stretched out of the controlled area and entered into the transition zone. In such cases, the use of compression reinforcement can return the section to the controlled area by tension, and indirectly by increasing the value of the reduction coefficient of resistance, it has a significant effect on the flexural strength of the section, which justifies its use economically. . In this research, the above issue is examined and evaluated and suggestions for how to use the armature optimally are presented.
Original Research Paper
Architecture
M. Hosseini
Abstract
The Anisotropy in the mechanical properties of the rocks is due to the presence of discontinuous plates in them. This paper examines the Anisotropy of the mechanical properties of sandstone. Due to the abundance of sandstone in Iran and the implementation of many projects in this type of rock, ...
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The Anisotropy in the mechanical properties of the rocks is due to the presence of discontinuous plates in them. This paper examines the Anisotropy of the mechanical properties of sandstone. Due to the abundance of sandstone in Iran and the implementation of many projects in this type of rock, this issue was chosen. The mismatch in the mechanical properties of sandstone is due to the presence of layering surfaces. The Anisotropy in permeability, single-axis compressive strength, tensile strength, three-axis compressive strength, adhesion and internal friction angle have been investigated in this paper. Meanwhile, the unevenness of the rock decreases with increasing enclosure pressure.
Original Research Paper
M.J. Maghrebi; A. Zarghami; M. Feyzabadi Farahani
Abstract
The dimensionless Navier-Stokes equation is solved in a rotational form for the flow of a two-dimensional boundary layer of plates by a direct numerical method. Considering the speed profile at the input of the computational domain, the thickness of the boundary layer has been used as the characteristic ...
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The dimensionless Navier-Stokes equation is solved in a rotational form for the flow of a two-dimensional boundary layer of plates by a direct numerical method. Considering the speed profile at the input of the computational domain, the thickness of the boundary layer has been used as the characteristic length and the uniform velocity of the environment has been used as the characteristic velocity for dimensionlessness. The governing differential equations are broken down using the method of finite compression difference in the main directions of the flow and perpendicular to the flow. A forced mapping has been used to convert the physical domain to the computational domain. In order to develop the calculations in the time domain, the third-order compact Ranj Kota method has been used. The output boundary condition is determined using the transfer model. The simulation results of this type of flow are compared with the resolution of Blasius, which shows the accuracy of the code. In this study, the flow characteristics of the quiet boundary layer to evaluate the accuracy of the code, test and by dividing the lengths and velocities by the thickness of the boundary layer and the uniform velocity of the environment, profiles and contours of velocity and vortex in the device of dimensionless coordinates and self-similarity have seen.
Original Research Paper
Architecture
S.B. Hosseini; S. Norouzian Maleki
Abstract
A large proportion of people in the community (the elderly, the physically disabled, children, etc.) face mobility limitations in urban spaces; However, the limitations of disability should not prevent people from accessing urban spaces, and they should be able to operate in an urban environment with ...
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A large proportion of people in the community (the elderly, the physically disabled, children, etc.) face mobility limitations in urban spaces; However, the limitations of disability should not prevent people from accessing urban spaces, and they should be able to operate in an urban environment with the maximum possible independence and without restrictions, like ordinary people in society. In this paper, the principles and foundations of inclusive design in immediate environments of residential spaces are presented. This is due to the fact that inclusive design for people in the community is a manifestation of justice and social security in access, which in addition to providing life and health security, will have extraordinary psychological effects. The present study proceeded with the assumption that if access to space is provided at different levels, then the participation and sensitivity of citizens will increase. In order to test this hypothesis, first, based on the content analysis technique, the general principles of inclusive design were defined and explained, and then the field research method was used to examine the status of accesses in the residential environment. In this field study, the problems, limitations and demands of individuals through local perceptions and observation of the current situation were identified and questionnaires were distributed among 74 residents of Narmak neighborhood of Tehran. In this study, a variety of people living in the neighborhood were examined. In addition to normal people, people with disabilities move around or lack this ability, including the visually impaired (the blind, the visually impaired, the deaf, and the deaf) and people with other disabilities. The findings showed that 14% of them had physical-motor disabilities, 5% had vision problems, 4% had hearing problems and 6% had other disabilities. After conducting field studies, due to the physical-motor limitations of individuals, the physical characteristics of the neighborhood spaces were analyzed. Analysis of findings, problems and major inadequacies of access such as lack of safety and comfort that leads to a decrease in social and physical activity showed. Finally, in this study, based on the results, solutions for inclusive design such as participation and presence, meeting needs, free and independent movement for all people in residential environments were presented.
Original Research Paper
Architecture
E. Zarghami; S.B. Hosseini; P.S. Sajjadi Qaem Maghami
Abstract
Each program is prepared, approved and implemented according to the policies, goals, facilities, and executive methods of the relevant period. With the advent of new ways of transmitting information and changing facilities and the need to improve the level of graduates, there are necessities that require ...
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Each program is prepared, approved and implemented according to the policies, goals, facilities, and executive methods of the relevant period. With the advent of new ways of transmitting information and changing facilities and the need to improve the level of graduates, there are necessities that require planners to reconsider their plans. The curriculum approved in 1998 for the "Bachelor of Architecture" course is no exception. It seems necessary to achieve the desired goals and coordinate with the new scientific and educational needs and trends, as well as to eliminate the problems and contradictions of review and revision in the above program. The growing needs of the country in the field of construction and quality improvement and the correctness of action in this field depends on the training of experts who can meet the needs of society in this regard. In this article, an attempt has been made to analyze and prove the discrepancies and problems between the goals and its executive methods by presenting the content of the program and to offer them corrective suggestions. In this regard, directing education towards responding as much as possible to the real needs of society and familiarizing students with their own culture and correct architecture has been considered. The Bachelor of Architecture Engineering course is a professional course that aims to foster creative talent, transfer knowledge and general skills of the architectural profession, and achieve general efficiency in this field. In line with the above goal, an attempt has been made to give the maximum possible price to the architectural design projects and the technical and theoretical courses surrounding it in planning this course. Because in the new structure of the field of architecture, which has become a bachelor's and master's degree discontinuous, and the goal is to train architects with general professional efficiency. In this regard, the number of units in accordance with each of the skills and expertise required by the country has been carefully studied and suggestions have been provided in relation to the issues raised.
