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INIZIO_TESTO_DA_INDICIZZARE

RESEARCH PROGRAM

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Research Units
Similar research programs:
Scientific and education field classification
International Patent Classification
  • PHYSICS
    • MEASURING (counting G06M); TESTING
      • GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS (detecting or locating foreign bodies for diagnostic, surgical or person-identification purposes A61B; means for indicating the location of accidentally buried, e.g. snow-buried persons A63B29/02; investigating or analysing earth materials by determining their chemical or physical properties G01N; measuring electric or magnetic variables in general, other than direction or magnitude of the earth\'s field G01R; electronic or nuclear magnetic resonance arrangements G01R33/20; radar, sonar or analogous methods in general, detecting masses or objects involving these methods G01S)
      • RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES [N: (for special applications, see the relevant subclasses, e.g. A61B, G01F, G01N, G02B; measuring dimensions or angles of objects G01B; navigation in general G01C; measuring infrasonic, sonic or ultrasonic vibrations in general G01H; measuring infra-red, visible, or ultra-violet radiation in general G01J; transducers per se, see the relevant subclasses, e.g. G01L, H01L, H04R; measuring direction or velocity of flowing fluids by reception or emission of radiowaves or other waves and based on propagation effects caused in the fluid itself G01P; measuring electric or magnetic variables in general G01R]; (detecting masses or objects by methods not involving reflection or radiation of radio, acoustic or other waves G01V; [N: time-interval measuring G04F]; aerials H01Q) [C9504]
    • NUCLEAR PHYSICS; NUCLEAR ENGINEERING
      • FUSION REACTORS (uncontrolled reactors G21J)
Geographical classification
Keywords
ELECTROTECHNICS; TIME SERIES ANALYSIS; SIGNAL INTEGRITY; MULTISENSOR DATA FUSION

Integrated Methods and Algorithms for NonDestructive Evaluations of architectural heritage

Politecnico di Bari
Abstract
The objective of this project is the realization of a system for the non-destructive diagnosis of important masonries, able to combine traditional and innovative diagnosis techniques with cooperative methodologies. The development of an integrated system for data acquisition and for information and knowledge management able to highlight the specified characteristics of the masonry will be developed; this automatic system will give objective and repeatable information about the state of the masonry and it will cluster and measure the typologies of the defects.
The main result of the project will be a software package which allows the user to evaluate the acquired data by a multisensor system.
The proposed project is constituted by three sections with strong interaction between all the 5 units. Each unit will process theoretical and experimental results which will be shared with the other units and integrated in a final software.
Optimization of traditional non-destructive diagnosis techniques. Some units will utilize investigation methodologies in which they are already experience, e.g. infra-red thermo-graphy (UR-1), sonic techniques (UR-4), ultrasonic techniques (UR-2) and they will do theoretical and experimental analyses, in order to individuate the testing procedures to supply the most efficient and effective information to individuate the state of an architectural work.
The expected results will allow the identification of typical >>>

Principal Investigator
Giuseppe ACCIANI Politecnico di BARI
Research Objectives
The evaluation of both the preservation state and the vulnerability of the artistic and architectural heritage with respect to the structural risks, particularly the seismical one, is a most important issue in our country. Well-established methods to evaluate mechanical and structural characteristics cannot be used to analyze masonries, because in our country there are a lot of different masonries from a typological point of view as well as from a constructive one. Then, dedicated non-destructive techniques have to be used in order to evaluate the risks of both static instabilities and collapses due to a seism. For historical buildings a first investigation requires the knowledge of the materials and of the preservation state.
The methodologies of non-destructive diagnosis and control for masonries arise from many different fields of application and are based on various techniques, able to supply some needed information about the state of the structure under test.
The evaluation of the structure state is often made on the basis of incomplete or less reliability information; in these cases the expertise and the experience has an important role in giving a different weight to the available indexes in order to obtain final information.
Sometimes these techniques are not correctly applied because of the poor resolution and precision of the investigation results. These drawbacks depend on un-appropriated mathematical tools, on the subjectivity of the >>>

Timescale
24 months
National and international background
To preserve historical and artistic buildings several diagnosis systems have to be employed to provide information about the construction methods, the conservation state, the alteration and degradation phenomena that might have taken place. The information collection must be organized in a systematic and scientific way, to allow an accurate diagnosis of the present damages, of state of the components and materials in the architectonic structure. Structure defects must be detected, highlighted and measured so that further damages can be prevented.
If the diagnosis is based on sure data and in-depth research, it is possible to carry into effect precautionary measures and to restrict action on the mansory. The present trend employs the most effort to prevent the damages, therefore this approach must be able to monitor the decay. Moreover the monitoring should use as possible non-destructive techniques.
The data acquisition is carried out by different methods which include the human observation, geometrical relief and experimental method. The experimental methods allow to verify and deepen the acquired information by means of the first two investigations, in this way the data are analyzed beyond the surface. They can measure and discriminate: the masonry structure, the discontinuities, the layers, the materials, the chemical elements.
The basis for many non-destructive test (NDT) procedures arises from the medical, aerospace, and geophysical fields.
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