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On-site Assessment and Validation

Objectives

The overall objective of the work package is to enhance current capabilities of experimental diagnosis of structural and material deterioration affecting historic structures due to environment, and thus to validate data acquired via the monitoring system sensors firstly by traditional methods and laboratory techniques. Wireless monitoring systems are in fact based on the continuous acquisition of structural, material and environmental parameters related to the global health state of the object. Nevertheless, due to the fact that some types of damage can affect the life expectance of the structure, it is required that the acquisitions be complete and reliable in order for the damage and its evolution to be detected.

In order to do this and to have at disposal a safe set of data which the ones from wireless sensors could be compared with, it is necessary to set up a measurement program that, through laboratory and site tests, by employing a combination of both lab analysis techniques on samples and state-of-the-art traditional diagnostic techniques applied on on-purpose built lab specimens as well as on real buildings, will allow comparison of experimental data. Through integration with visual inspection, information from available documentation and other forms of inspections, on one side a true diagnostic methodology of historic structures will be set up to constitute a major advancement on current diagnostic procedure; on the other side, a sure condition evaluation of the structure, detailed data and material parameter values will be the paragon criterion for the wireless sensor data validation. The approach to reach the above described overall objective can be broken down into the following particular objectives:
  • employ in the laboratory different experimental methodologies - by making a comparative and combined use of traditional and innovative methods, non-destructive or micro-destructive techniques, visual-physical-chemical analyses, mechanical tests - on a number of building materials (wood, brick and stone masonry, mortars, plasters, terracotta, pigment layers, ...) and material assemblies typical of historic structures, for better investigation of structural damage and environmental pollution effects
  • measure physical, chemical and mechanical parameters during repeated monitoring on samples and specimens for better understanding of structural and material deterioration processes due to environment
  • during laboratory testing of samples or specimens, at the same time of traditional diagnostic and analysis equipment, apply and employ specific wireless sensors (from those developed or to be implemented on the monitoring systems) in order to test their applicability and reliability for the specific cases.
  • contribute to the activities of WP4 (Modelling and Analysis): a) by providing input information and data to help refine the modelling of historic structures behaviour and their response to mechanical and physical actions; b) by providing reference data to verify the outcome of material and structural analyses performed on the basis of the deterioration models developed
  • develop enhanced and user friendly data acquisition, analysis and interpretation procedures, including data imaging and fusion
  • relate values of measured parameters to the damage level of the cultural heritage object
  • on site, conduct repeated reference measurements via physical-chemical analyses and NDT tests (vibrations, acoustic, electromagnetic, infrared, acoustic emission methods, ...) in various environmental conditions to assess complex structures.

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Created by: admin. Last Modification: Tuesday 14 of February, 2012 10:21:54 CET by admin.