Optimization of Design Parameters for Materials Consumption for Reinforcing Metal Framework of Industrial Buildings

2018 ◽  
Vol 875 ◽  
pp. 122-127 ◽  
Author(s):  
Tatyana Zolina ◽  
Pavel Sadchikov
Keyword(s):  
Life Cycle ◽  
Mathematical Models ◽  
Optimum Design ◽  
Structural Reliability ◽  
Steel Structures ◽  
Design Methods ◽  
Design Parameters ◽  
Seismic Resistance ◽  
Economic Costs ◽  
Industrial Buildings

This study investigated optimum design methods for frame buildings with focus on minimization of economic costs. The methods discussed are intended to provide sufficient reserves for reliability of load-bearing steel structures. The analyzed mathematical models enable to assess seismic resistance of a structure and implement optimum design methods according to the selected key criterion. The available mathematical models assessing economic efficiency of metalwork reinforcement need further development. The model based on the principle of balanced risk is considered as the most appropriate for the study of structural reliability for industrial buildings. This model allows to assess the expected damage as compared with the initial spending on seismic protection. The focus is on setting and implementation of the task whose limiting condition provides equality between expenditures for reinforcement of damaged steel structures and those for damage prevention activities. Minimum of economic costs for construction or reconstruction of a structure is taken as the optimality criterion. This takes into account accumulation of damages within the standard life cycle and changes in stiffness of materials. Assessment of damage risk is based on the life cycle of a structure, its seismic resistance class and spending on damage repair. The study suggests a number of structural solutions that enable to reduce deformation of steel parts of the frame.

Research of Fire Resistance of Elements of Steel Frames of Industrial Buildings

2021 ◽  
Vol 1038 ◽  
pp. 506-513
Author(s):  
Viktor Hvozd ◽  
Eugene Tishchenko ◽  
Andriy Berezovskyi ◽  
Stanislav Sidnei
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Mathematical Models ◽  
Bearing Capacity ◽  
Fire Resistance ◽  
Limit State ◽  
Steel Frames ◽  
Steel Structures ◽  
Computational Experiments ◽  
Industrial Buildings

The article considers and analyses the methods by which it is possible to carry out research to determine the fire resistance of elements of steel frames of industrial buildings. It is determined that it is expedient to use the means of computational fluid dynamics, which has no limitations due to the high cost, complexity, environmental friendliness and complexity in comparison with real experiments. In order to conduct the most reliable computational experiments, mathematical models of temperature and mechanical reaction to the thermal effect of fire were created, taking into account the equations of thermal conductivity, systems of differential equations of stress-strain state of solids in their numerical implementation based on the finite element method. The solution of mathematical models was carried out using computational fluid dynamics, which describes the process of heat and mass transfer in test fire furnaces during the determination of fire resistance of steel structures. According to the results of computational experiments it is shown that the limiting state of loss of bearing capacity of vertical and horizontal structures occurs due to the formation of a zone of plastic deformations taking into account the associative theory of plasticity. According to the results of computational experiments, the dependence of the limit of fire resistance on the level of applied load to structures, which is close to linear, was revealed. Based on the obtained dependences and the corresponding graphs, a technique is developed based on the use of maximum deformations of the elements with the corresponding fixation of the limit state on the loss of fire resistance in terms of bearing capacity by bending this curve.

Performance-based multiobjective optimum design of steel structures considering life-cycle cost

2006 ◽  
Vol 32 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Michalis Fragiadakis ◽  
Nikos D. Lagaros ◽  
Manolis Papadrakakis
Keyword(s):  
Life Cycle ◽  
Optimum Design ◽  
Life Cycle Cost ◽  
Steel Structures

Multi-objective optimum design of nonlinear viscous dampers in steel structures based on life cycle cost

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 3776-3788
Author(s):  
Narges Ahadzadeh Kolour ◽  
Mohammad Charkhtab Basim ◽  
Mohammadreza Chenaghlou
Keyword(s):  
Life Cycle ◽  
Optimum Design ◽  
Life Cycle Cost ◽  
Steel Structures ◽  
Viscous Dampers ◽  
Multi Objective

A mathematical model and an algorithm for sampling sets of components on the Assembly enterprises of space technology

2018 ◽  
Vol 15 (1) ◽  
pp. 39-55
Author(s):  
V. B. Rudakov ◽  
V. M. Makarov ◽  
M. I. Makarov
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Space Technology ◽  
Economic Costs ◽  
Problem Statement ◽  
Optimal Plan ◽  
Product Mix ◽  
Technical Parameters ◽  
Complex Products ◽  
Assembly Plants

The article considers the problem of determining the rational plans of the input sampling reliability and technical parameters of components of space technology, the totality of which is supplied to the Assembly plants for the manufacture of complex products of space technology. Problem statement and mathematical model based on the minimization of the economic costs of control and losses related to the risks of taking wrong decisions, are given in the article. The properties of the mathematical models are investigated, the algorithm for its optimization is developed. The result is an optimal plan for the sampling of sets of components, which includes: an optimal product mix subject to mandatory control of the aggregate and optimum risks of first and second kind, when acceptance number of statistical plan is zero. The latter circumstance is due to the high requirements of reliability and technical parameters of products of space technology.

Optimum Design Parameters of an Automotive Blower Fan Housing Scroll

1996 ◽  
Author(s):  
Monier B. Botros ◽  
Bashar S. AbdulNour ◽  
Todd E. Smith ◽  
Ming-Chia Lia
Keyword(s):  
Optimum Design ◽  
Design Parameters

scholarly journals Risk-Informed Performance-Based Metrics for Evaluating the Structural Safety and Serviceability of Constructed Assets against Natural Disasters

2021 ◽  
Vol 13 (11) ◽  
pp. 5925
Author(s):  
Nuno Marques de Almeida ◽  
Maria João Falcão Silva ◽  
Filipa Salvado ◽  
Hugo Rodrigues ◽  
Damjan Maletič
Keyword(s):  
Life Cycle ◽  
Built Environment ◽  
Natural Disasters ◽  
Evaluation Criteria ◽  
Design Methods ◽  
Structural Safety ◽  
Building Structures ◽  
Natural Agents ◽  
Long Life ◽  
Physical Asset

The tangible and intangible value derived from the built environment is of great importance. This raises concerns related to the resilience of constructed assets to both human-made and natural disasters. Consideration of these concerns is present in the countless decisions made by various stakeholders during the decades-long life cycle of this type of physical asset. This paper addresses these issues from the standpoint of the engineering aspects that must be managed to enhance the structural safety and serviceability of buildings against natural disasters. It presents risk-informed performance-based parameterization strategies and evaluation criteria as well as design methods to embed differentiated levels of structural safety and serviceability of buildings against wind, snow, earthquakes and other natural agents. The proposed approach enables designers to assure the resilience and reliability of building structures against natural risks.

THE EVALUATION OF THE POTENTIAL OF THE COMPUTATIONAL DESIGN METHODS IN ARCHITECTURE WITH THE LIFE CYCLE MODEL

2020 ◽  
Vol 0 (21) ◽  
pp. 0-0
Author(s):  
Serkan PALABIYIK ◽  
Derya DEMİRCAN
Keyword(s):  
Life Cycle ◽  
Information And Communication Technologies ◽  
Architectural Design ◽  
Computational Design ◽  
Design Methods ◽  
Information Modeling ◽  
Life Cycle Model ◽  
Cycle Model ◽  
Product Representation ◽  
Structure Information

Aim: Evolution process in information and communication technologies, architectural design and therefore in the field of architecture; It goes from product representation and communication use, which can be modeled in the computer environment, to the processing of data, information and information, to support creativity and decision making, an activity specific to human mental processes. In this process, many computational design methods have been developed that play an important role in contemporary design practices and guide the change of design culture in recent years. The top aim in this study presented; It is the evaluation of the methods developed in the field of computational design through the life cycle model. Method: At the point of investigating the spread and usage of the design methods included in the study within the sample area, bibliometric analysis, and content analysis methods, which are used to evaluate scientific studies, was used to draw repeatable and valid results regarding the content of the examined text. Results: The study shows that the most published design methods in the computational design are simulation-based design, structure information modeling, shape grammars, and genetic algorithms, respectively. In addition, it is determined that the most preferred international congress in this field is eCAADe. According to the evaluation of the total number of publications in this field, the contribution of Turkish researchers to the field was found to be 3%. Conclusion: This study evaluated when the upper scale, which are related to computational design methods in Turkey, we can conclude that there is insufficient scientific studies. In order to be able to use the rapidly developing computational design tools more effectively, to improve the computational design ability and to reflect the education process in the design process, it is important to have a voice in the architecture of the future.

Causes of Structural Failures with Steel Structures

2017 ◽  
Author(s):  
Goran Alpsten
Keyword(s):  
Structural Damage ◽  
Human Error ◽  
Structural Reliability ◽  
Steel Structures ◽  
Fatigue Loading ◽  
Structural Instability ◽  
Human Errors ◽  
Collapse Mode ◽  
Load Carrying ◽  
Structural Failures

This paper is based on the experience from investigating over 400 structural collapses, incidents and serious structural damage cases with steel structures which have occurred over the past four centuries. The cause of the failures is most often a gross human error rather than a combination of “normal” variations in parameters affecting the load-carrying capacity, as considered in normal design procedures and structural reliability analyses. Human errors in execution are more prevalent as cause for the failures than errors in the design process, and the construction phase appears particularly prone to human errors. For normal steel structures with quasi-static (non-fatigue) loading, various structural instability phenomena have been observed to be the main collapse mode. An important observation is that welds are not as critical a cause of structural steel failures for statically loaded steel structures as implicitly understood in current regulations and rules for design and execution criteria.

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