Development of the technique of expert assessment in the diagnosis of the technical condition of buildings

Grigorovskiy, Peter; Terentyev, Oleksandr; Mikautadze, Revaz

doi:10.15587/2312-8372.2018.128548

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…If, in addition to the resulting uncertainties caused by these objective facts, take into account the uncertainties caused by the need to attract expert opinion and obtain appropriate expert assessments, there is reason to assert the effectiveness of comparator identification in conditions of fuzzy description. The latter is especially important in areas with an increased level of requirements for the safety of the operation and operation of facilities [17][18][19]. Taking into account the fact that the solution of problems arising in these applications by traditional methods of regression analysis is impossible, the method proposed in this work, which reduces the problem to solving the arising system of linear algebraic equations, the parameters of which are given indistinctly, is an effective mathematical apparatus.…”

Section: Discussion Of the Results Of Solving The Problem Of Comparator Identification In Conditions Of Fuzzy Initial Datamentioning

confidence: 99%

Comparator Identification in the Conditions of Bifuzzy Initial Data

2021

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When solving a large number of problems in the study of complex systems, it becomes necessary to establish a relationship between a variable that sets the level of efficiency of the system's functioning and a set of other variables that determine the state of the system or the conditions of its operation. To solve this problem, the methods of regression analysis are traditionally used, the application of which in many real situations turns out to be impossible due to the lack of the possibility of direct measurement of the explained variable. However, if the totality of the results of the experiments performed can be ranked, for example, in descending order, thus forming a system of inequalities, the problem can be presented in such a way as to determine the coefficients of the regression equation in accordance with the following requirement. It is necessary that the results of calculating the explained variable using the resulting regression equation satisfy the formed system of inequalities. This task is called the comparator identification task. The paper proposes a method for solving the problem of comparator identification in conditions of fuzzy initial data. A mathematical model is introduced to describe the membership functions of fuzzy parameters of the problem based on functions (L–R) – type. The problem is reduced to a system of linear algebraic equations with fuzzy variables. The analytical relationships required for the formation of a quality criterion for solving the problem of comparator identification in conditions of fuzzy initial data are obtained. As a result, a criterion for the effectiveness of the solution is proposed, based on the calculation of membership functions of the results of experiments, and the transformation of the problem to a standard problem of linear programming is shown. The desired result is achieved by solving a quadratic mathematical programming problem with a linear constraint. The proposed method is generalized to the case when the fuzzy initial data are given bifuzzy

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Section: Discussion Of the Results Of Solving The Problem Of Comparator Identification In Conditions Of Fuzzy Initial Datamentioning

confidence: 99%

Comparator Identification in the Conditions of Bifuzzy Initial Data

2021

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“…The theoretical grounds regarding intensity of formation of defects in residential buildings and their reliability has already been presented in [ 9 ]. The problem of the damage and destruction of residential buildings was described in detail in the literature, e.g., [ 10 , 13 , 15 ]—also in relation to the life cycle of a building [ 17 , 19 ] and the cost approach [ 22 , 25 ]. It can be found a classification of damage that is specific for different types of buildings, e.g., those built using industrialized construction methods or traditional construction methods.…”

Section: Methodology and Methodsmentioning

confidence: 99%

“…A research attempt to assess the technical condition of downtown tenement houses in Wroclaw was described in detail in reports [ 7 ] and publications [ 8 , 9 ]. The approach to the investigation of building structures meets the broad requirements of their maintenance and use and is derived from standard BS 8210:2012 “Guide to facilities maintenance management” [ 10 ], with detailed research methods and tools being provided in publications [ 11 , 12 , 13 , 14 , 15 , 16 ]. The life cycle of a building structure is presented within the engineering approach in articles [ 17 , 18 , 19 , 20 , 21 ], and with regards to cost approach in papers [ 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Correlation between Defects and Technical Wear of Materials Used in Traditional Construction

Konior

Rejment

2021

Materials

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The degree of technical wear of old buildings, which are made of basic materials (cement, concrete, steel, timber, plaster, brick) using traditional technology, is expressed by the size and intensity of damage to their elements. The topic of the research concerns old residential buildings from the turn of the 19th and 20th centuries, which are located in the downtown district of Wroclaw, Poland. The descriptive analysis and the analysis of the definitions of defects that occur in the elements of residential buildings, which were performed as random analyzes, do not allow defects to be considered as measurable variables at a level of visual investigation. The major drawback of the method that is used by experts when assessing the technical condition of civil engineering buildings is that it does not numerically express the magnitude (strength) of the defects. Therefore, an attempt was made to numerically express the relationship (if such a relationship exists) between the occurred defects of buildings and the extent of their technical wear process. When calculating the strength of this relationship, the method of determining the point biserial correlation coefficient for the measurable property and the dichotomous property was used. It was found that the direction of the relation is right-hand for all the tested building elements, but the strength of the correlation between the detected defects and technical wear shows a considerable span and depends on the conditions of the apartment house’s maintenance. As a rule, damage caused by water penetration and moisture penetration always shows correlations of at least moderate strength.

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“…In the process of multi-criteria analysis of the technical condition of buildings, the study of the technical wear of buildings and structures is of fundamental importance, e.g., [22][23][24]. Regardless of the methods used to evaluate an object, the degree of technical wear of its elements is the basic parameter when making decisions about the future of a residential building [25].…”

Section: Introductionmentioning

confidence: 99%

Influence of Age on the Technical Wear of Tenement Houses

2020

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The research presented in the article, which includes methods, models, and conclusions, contains synthetic and analytical model solutions concerning the problems of the technical maintenance and wear of residential buildings with a traditional construction. The cause and effect relationships between the occurrence of damage in the elements of tenement houses (treated as proof of their maintenance conditions), and the size of the technical wear of these elements were determined using a representative and purposefully selected sample of 102 residential buildings erected during the second half of the nineteenth and early twentieth centuries in Wroclaw’s “Downtown” district. Quantitative damage analysis, which was carried out using empirical (visual) methods of assessing the technical condition of a building, indicates the type and size of damage to the building’s elements that are characteristic for the relevant maintenance conditions. Research concerning the cause–effect relationships (“damage–technical wear”) in observed states allows for a numerical approach to the impact of building maintenance conditions on the degree of the technical wear of its components. The maintenance and exploitation conditions determine the degree of the technical wear of the elements of an old residential building. The exploitation condition of these buildings is manifested by damage to elements caused by water and moisture penetration, which is especially important for poorly maintained buildings. The article shows that the age of the elements of an old residential building with a traditional construction is of secondary importance in the process of the intensity of losing its serviceability value. It was calculated that no more than 30% of the damage of building components is explained by the passage of time, and it is therefore not age that determines the course of the technical wear of the elements of the analyzed tenement houses.

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Development of the technique of expert assessment in the diagnosis of the technical condition of buildings

Cited by 4 publications

References 7 publications

Comparator Identification in the Conditions of Bifuzzy Initial Data

Comparator Identification in the Conditions of Bifuzzy Initial Data

Correlation between Defects and Technical Wear of Materials Used in Traditional Construction

Influence of Age on the Technical Wear of Tenement Houses

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