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Validazione della procedura di calcolo della profondità di carbonatazione secondo M.C. N°34, 2006. Applicazione ad un ponte in c.a.p.
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Vulnerabilty assessment of a concrete bridge through fuzzy logic analysis of visual inspection compared to chemical inspection
No full textIn this paper we compare the results of different methodologies of inspections, made on the deck of a concrete bridge located near Cagliari, along the SS 195 road to Capoterra. From a strategic point of view this structure plays a key role ensuring direct connections from Cagliari to different structures related to industrial and local productions and to an important touristic district. Aim of our work is to obtain a real measure of the vulnerability through two procedures and compare them. The first one is based only on visual inspection while the second one realizes a measure in time of the vulnerability through chemical and physical processes focusing on the carbonation depth.
With the first procedure we manipulated the data obtained by visual inspection with fuzzy logic, thus using mathematical and logic functions to transform linguistic assessments, inherently subjective, into a numerical result, thus objective, representing the failure probability. This is derived from visual inspection and it’s then compared to the results obtained through the evaluation of the carbonation process in the concrete beams of the bridge. The goal is to verify the reliability of visual inspection through the comparison of the data obtained with the two different approaches and trace a methodology in order to reduce the number of invasive actions and their cost
Vulnerability analysis of a reinforced concrete structure by visual inspection
No full textThe article outlines a new, reliable and robust approach for estimating the vulnerability of
reinforced concrete structures, developing a survey methodology based only on visual inspection.
The results of visual inspection are subjective assessments of the structural safety yet easy to obtain employing
unskilled operators. Aim of our work is to obtain an objective assessment of the safety level by manipulating
the linguistic judgments using fuzzy logic, chosen for its ability to quantitatively treat the uncertainty of
reality and inaccuracy of natural language. In this procedure the fuzzy rules that are applied to the linguistic
judgments are previously stated by experts, technically competent to evaluate the different types of degradations
that will be under view and their weight on the overall safety level of the structure. This inference process
makes it possible to obtain an objective safety statement from a subjective linguistic statement.
This method was applied to an existing reinforced concrete structure, a bridge 3 km long, located in an aggressive
seawater environment
Vulnerability assessment of concrete bridges using different methods of visual inspection
No full textThis paper shows the comparisons between different methods of visual inspection used in European Countries. These methodologies are applied to the deck bridge located near Cagliari, along the SS 195 road to Capoterra. From a strategic point of view, this structure plays a key role ensuring a direct connection to different structures related to industrial and local productions and to an important touristic district. This is a prestressed concrete bridge in an aggressive marine environment, which in October 2008 was hit by a flood that caused subsidence in the foundations. The aim of our inspection is to obtain a real measure of the vulnerability through different procedures and to determine which is the best method able to give objective results
A reliable visual inspection method for the assessment of r.c. structures through fuzzy logic analysis
No full textThe article outlines a new, reliable and robust approach for estimating the vulnerability of reinforced structures, developing a survey methodology based only on visual inspection. Aim of this paper is to obtain an objective assessment of the safety level by manipulating the linguistic judgments using fuzzy logic, chosen for its ability to quantitatively treat the uncertainty of reality and inaccuracy of natural language. In this procedure, the fuzzy rules that are applied to the linguistic judgment are previously stated by experts, technically competent to evaluate the different types of degradations that will be under view and their weight on the overall safety level of the structure. This inference process makes it possible to obtain an objective safety statement from a subjective linguistic statement. The results of visual inspection are then subjective assessments of the structural safety yet easy to obtain employing unskilled operators
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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