scholarly journals THEORETICAL ANALYSIS OF EXISTING CONCEPTS TO EVALUATE THE NON-FAILURE OF RC STRUCTURES IN OPERATION

2021 ◽  
Vol 2021 (2) ◽  
pp. 1-6
Author(s):  
Roman Tytarenko ◽  
◽  
Roman Khmil ◽  
Iryna Dankevych ◽  
◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Cross Sections ◽  
Theoretical Research ◽  
Random Parameters ◽  
Rc Structures ◽  
Advantages And Disadvantages ◽  
Statistical Selection ◽  
Rc Structure ◽  
Failure Assessment ◽  
Strength And Deformation

The article presents a theoretical analysis of existing concepts to evaluate the non-failure of RC structures in operation. To perform the analysis, the authors considered a number of scientific works of both Ukrainian and foreign researchers. The main focus was on works in which the model of the stochastic nature of the RC structure operation included random parameters of acting loads, as well as the reserve of its bearing capacity and serviceability (geometric dimensions of cross sections of constructive members, strength and deformation characteristics of materials, etc.). Among others, according to the authors, important problems in terms of analysis of a single work were the volume of statistical selection of random parameters, their number and impact on the study result, as well as rationality of the adopted method of calculating the probability of failure (or non-failure work) of RC structure in operation. Based on the processing of a number of scientific works, the authors highlight the relevance, advantages and disadvantages of the concepts of non-failure assessment proposed there, as well as the formulate the conclusions and recommendations for further experimental and theoretical research in this area.

Compressed Thin-Walled Cold-Formed Steel Members with Closed Cross-Sections

2014 ◽  
Vol 969 ◽  
pp. 93-96 ◽  
Author(s):  
Mohamad Al Ali
Keyword(s):  
Experimental Investigation ◽  
Theoretical Analysis ◽  
Cross Sections ◽  
Theoretical Research ◽  
Loading Process ◽  
Steel Members ◽  
Fundamental Information ◽  
Cold Formed Steel ◽  
Thin Walled ◽  
Theoretical Results

The paper presents fundamental information about experimental-theoretical research oriented to determinate the resistance of thin-walled compressed steel members. The investigated members had closed cross-sections made from homogeneous materials. The theoretical analysis in this research is oriented to determinate the resistance of mentioned members according to relevant standards, while the experimental investigation is to verify the theoretical results and to investigate the behavior of mentioned members during the loading process.

Research Situation Analysis of On-line Detection Technology for Power Transformer Winding Deformation

2020 ◽  
Vol 13 (6) ◽  
pp. 823-832
Author(s):  
Zhenhua Li ◽  
Weihui Jiang ◽  
Li Qiu ◽  
Zhenxing Li ◽  
Yanchun Xu
Keyword(s):  
Detection Method ◽  
Theoretical Research ◽  
Line Detection ◽  
Response Analysis ◽  
Advantages And Disadvantages ◽  
Detection Technology ◽  
The Future ◽  
Transformer Winding ◽  
On Line ◽  
Winding Deformation

Background: Winding deformation is one of the most common faults in power transformers, which seriously threatens the safe operation of transformers. In order to discover the hidden trouble of transformer in time, it is of great significance to actively carry out the research of transformer winding deformation detection technology. Methods: In this paper, several methods of winding deformation detection with on-line detection prospects are summarized. The principles and characteristics of each method are analyzed, and the advantages and disadvantages of each method as well as the future research directions are expounded. Finally, aiming at the existing problems, the development direction of detection method for winding deformation in the future is prospected. Results: The on-line frequency response analysis method is still immature, and the vibration detection method is still in the theoretical research stage. Conclusion: The ΔV − I1 locus method provides a new direction for on-line detection of transformer winding deformation faults, which has certain application prospects and practical engineering value.

Theoretical analysis of horizontal condenser-evaporator conduits of various cross-sections

Desalination ◽  
1975 ◽  
Vol 17 (2) ◽  
pp. 167-192 ◽  
Author(s):  
S. Sideman ◽  
D. Moalem ◽  
R. Semiat
Keyword(s):  
Theoretical Analysis ◽  
Cross Sections

Assessment of destressing drilling efficiency using numerical methods: A case-study of Oktyabrsky deposit

2021 ◽  
pp. 26-31
Author(s):  
M. P. Sergunin ◽  
T. P. Darbinyan ◽  
T. S. Mushtekenov ◽  
V. V. Balandin
Keyword(s):  
Rock Mass ◽  
Theoretical Research ◽  
Labor Input ◽  
Efficiency Criterion ◽  
Strength And Deformation ◽  
Low Efficiency ◽  
Full Scale Tests ◽  
Time Required ◽  
Polar Division

Mineral mining in rockburst-hazardous conditions should involve various precautions in compliance with federal regulations and standards. One of the main methods to prevent rock bursts is destressing drilling. In this method, a yielding zone is artificially created. The strength and deformation characteristics in this zone differ from the same characteristics of enclosing rock mass, and redistribution of stresses takes place as a result. Efficiency of destressing drilling is estimated in terms of ore body S-2 in Komsomolsky Mine. The efficiency criterion is selected to be the safety factor of rock mass with and without destressing drilling. Low efficiency of destressing drilling means that this method is readily replaceable by the other techniques of lesser labor input, for example, by reduction in the rate of mining, or by seasoning of underground excavations for some time required for redistribution of stresses to take place. Based on the theoretical research and the conclusions drawn at NorNickel’s Polar Division, the full-scale tests are scheduled for the implementation in order to gradually abandon destessing drilling in rockburst-hazardous Talnakh and Oktyabrsky ore fields. The authors appreciate participation of V. P. Marysyuk from NorNickel’s Polar Division in this study.

scholarly journals ILLUSORY RESTITUTION OF NOT PRESERVED ARCHITECTURAL OBJECTS – AN ANALYSIS OF METHODS AND A CASE STUDY

space&FORM ◽  
2021 ◽  
Vol 2021 (47) ◽  
pp. 83-104
Author(s):  
Maciej Piekarski ◽  
◽  
Ewa Kulpińska ◽  
Anna Prokop ◽  
◽  
...  
Keyword(s):  
Augmented Reality ◽  
Theoretical Analysis ◽  
Advantages And Disadvantages ◽  
Conservation Method ◽  
Specific Conservation

The article concerns the illusory presentation of non-existent architectural objects directly in the place of their original location. This specific conservation method is considered as a tool for disseminating knowledge about the original architectural landscape of places where it has undergone transformations. The authors believe that its implementation may contribute to the growth of the identity of cities and their inhabitants. The concept refers to augmented reality, but the authors use only optical means to create a virtual component, The article presents the results of theoretical analysis and practical experiments, pointing to the advantages and disadvantages of the method.

scholarly journals Effects of Tension Reinforcement Ratio on Ductility of Mid-Rise Reinforced Concrete Structures

2018 ◽  
Vol 1 (1) ◽  
pp. 702-708
Author(s):  
Onur Onat ◽  
Burak Yön
Keyword(s):  
Reinforced Concrete ◽  
Failure Mode ◽  
Concrete Structures ◽  
Reinforcement Ratio ◽  
Reinforced Concrete Structures ◽  
Rc Structures ◽  
Beam Elements ◽  
First Case ◽  
Rc Structure ◽  
Determine Effect

Failure mode of reinforced concrete (RC) structures are classified according to tension reinforcement ratio of beam elements. To determine effect of tension reinforcement ratio on performance of RC structure, two planar RC structure were selected. One of them is 5 stories other of them is 7 stories. Two different concrete class, C20 and C25, were considered for analysis. Three tension reinforcement combinations were considered, three different tension reinforcement ratios were used. First case is the ratio of the tension reinforcement is lower than that of the compression reinforcement, second case is the ratio of the tension reinforcement is equal to the ratio of the compression reinforcement and third case is the ratio of the tensile reinforcement is higher than the compression reinforcement.

scholarly journals The Expression of Social and Emotional Competencies of Leadership in Lithuanian Organizations: The Gender Approach

2019 ◽  
Vol 85 ◽  
pp. 51-68
Author(s):  
Violeta Šilingienė ◽  
Dalia Stukaitė
Keyword(s):  
Empirical Research ◽  
Leadership Competencies ◽  
Female Leadership ◽  
Theoretical Research ◽  
Emotional Competencies ◽  
Social And Emotional ◽  
Advantages And Disadvantages ◽  
The Social ◽  
Emotional Leadership ◽  
Social And Emotional Competencies

The phenomenon of gender leadership is a controversial object in contemporary leadership studies. These days, the possibilities of traditional leadership have been limited by the ongoing dynamic, global changes, which have influenced the emergence of female leadership as an independent phenomenon and its separation from the male leadership. Presently, possibilities exist to form new insights about gender leadership. Scholars have begun an intense scientific discussion on the advantages and disadvantages of male and female leadership. The goal of this paper is to disclose the social and emotional leadership competencies of different gender employees. The employed research methods are as follows: an analysis and synthesis of scientific literature with the aim of revealing the peculiarities of gender leadership and defining leadership as a set of social and emotional competencies; quantitative research conducted using a questionnaire-based survey with the aim of empirically determining the manifestation of social and emotional leadership competencies in terms of gender leadership. The theoretical analysis allows us to identify the fundamental trends of gender leadership research. The empirical basis of this article comprises the results of empirical research carried out in 2018. The paper includes an abstract of the theoretical research of gender leadership and the social and emotional leadership competencies based on the research methodology and the results received. According to the results of the empirical research, it is possible to find matching assessments of social and emotional leadership competencies in men and women; certain significant differences exist as well. These results revealed which of the advantages possessed by female leaders tend to lie in their soft management skills: interaction, trust, as well as relationships and skills in working with people.

Online Focus Groups

2015 ◽  
pp. 31-55
Author(s):  
Oksana Parylo
Keyword(s):  
Mixed Methods ◽  
Data Collection ◽  
Focus Groups ◽  
Mixed Methods Research ◽  
Theoretical Research ◽  
Online Research ◽  
Future Trends ◽  
Advantages And Disadvantages ◽  
Online Focus Groups ◽  
Data Collection Technique

The overall aim of this chapter is to provide a better understanding of how a specific technique of online research methodology, online focus groups, has been theoretically conceptualized and practically utilized in order to examine its advantages and disadvantages to improve future applications of this technique in qualitative and mixed methods research. The chapter offers an overview of qualitative and mixed methods empirical research using online focus groups in different disciplines and outlines the strengths and weaknesses of this data collection technique. In addition, based on the review of empirical and theoretical research, the current and emerging practices in and characteristics of using online focus groups for data collection are outlined and used to suggest future trends in using this data collection technique in qualitative and mixed methods research.

School enterprise cooperation mechanism based on improved decision tree algorithm

2020 ◽  
pp. 1-11
Author(s):  
Fei Bian ◽  
Xuansheng Wang
Keyword(s):  
Decision Tree ◽  
Information Exchange ◽  
Manufacturing Industry ◽  
Central Committee ◽  
Theoretical Research ◽  
Decision Tree Algorithm ◽  
Tree Algorithm ◽  
Advantages And Disadvantages ◽  
Cooperation Mechanism ◽  
School Enterprise

School enterprise cooperation is of great strategic significance to China’s manufacturing industry. The Party Central Committee has repeatedly proposed to strengthen the integration of industry and education and deepen the cooperation between schools and enterprises. In recent years, experts and scholars at home and abroad have been from different perspectives, although they have achieved fruitful results, there are also problems such as insufficient attention to theoretical research, relatively backward research, narrow research scope, and so on. In view of this phenomenon, this paper will study a new school-enterprise cooperation mechanism based on the improved decision tree algorithm. The research of this paper is divided into three parts. First, after analyzing the advantages and disadvantages of the algorithm, the algorithm of the decision tree is improved, which makes the improved algorithm more suitable for the field of school-enterprise cooperation. Then, based on cloud computing and intelligence, this paper establishes a new model of school-enterprise cooperation platform, which solves some problems of data management and information exchange in school-enterprise cooperation. Finally, in order to make the cooperation mechanism of this paper better used in practice, this paper builds an online and offline hybrid training base, hoping to make the cooperation between schools and enterprises closer through the training base. In order to test the effect of the cooperation model, this paper takes school as the experimental model. After investigation and research, it is believed that thanks to the school-enterprise cooperation mechanism in this paper, the cooperative enterprise of school has been greatly improved in the past three years, and the willingness of enterprises to cooperate has become more and more strong. No matter students, teachers, or enterprises are reaping huge benefits under this cooperation mechanism, it is a suit for extensive promotion The school-enterprise cooperation mechanism of Guangyun.

scholarly journals Artificial Ground Motions and Nonlinear Response of RC Structures

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Marco Filippo Ferrotto ◽  
Francesco Basone ◽  
Panangiotis G. Asteris ◽  
Liborio Cavaleri
Keyword(s):  
Nonlinear Response ◽  
Nonlinear Dynamic Analysis ◽  
Point Of View ◽  
Reference Structure ◽  
Statistical Point ◽  
Rc Structures ◽  
Advantages And Disadvantages ◽  
Artificial Records ◽  
Different Levels ◽  
Selection Of

The selection of seismic inputs for nonlinear dynamic analysis is widely debated, mainly focusing on the advantages and disadvantages provided by the choice of natural, simulated, or artificial records. This work proves the differences in the structural behavior of RC buildings when using accelerograms with different levels of stationarity. Initially, nonlinear response under three sets of accelerograms equivalent in terms of pseudo acceleration spectrum is evaluated and compared. Then, the results of incremental dynamic analyses are compared by the statistical point of view considering different levels of irregularity for the reference structure.

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