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STructural stABiLity risk assEssment

Periodic Reporting for period 1 - STABLE (STructural stABiLity risk assEssment)

Reporting period: 2018-11-01 to 2020-10-31

Europe’s Cultural Heritage (CH) is at risk, endangered by environmental processes enhanced by climate changes and anthropogenic pressure. Specifically the slow (landslides, subsidence) and seismic (earthquake) movements of the ground have a strong impact on the structural stability of the CH. To have an idea of the dimension of the phenomena, the damage on the CH asset declared by the Italian Ministry of CH, caused by the recent earthquakes in Centre Italy, has been assessed in 2 Billion Eur. In this scenario, authorities in charge to CH preservation have a strong requirement for systematic, effective, usable and affordable tools and services to forecast and monitor the degradation process to enable preventive maintenance and to reduce the cost of the restoration.
STABLE addresses the design and development of a Thematic Platform, combining structural stability models, damage assessment simulation tools, advanced remote sensing, in-situ monitoring technologies, geotechnics and cadastral data sets with WebGIS application for mapping and long term monitoring of CH. This will enable effective monitoring and management of the CH to prevent, or at least reduce, catastrophic damages.
STABLE will coordinate the existing expertise and research efforts of the participant beneficiaries into a synergetic plan of collaborations and exchanges of personnel to offer a comprehensive transfer of knowledge and training environment for the researchers in the specific area. The development of Platform will constitute for scientist the way to share and improve CH safeguard methods, and to professionals to apply the most advanced technologies in the related fields.
First period has been mainly directed to the acquisition of information as ground data (e.g. geotechnical information), site scale monitoring (e.g. ground monitoring stations, laser scanners etc.) and risk forecasting models (earthquake) to derive end-user driven products (e.g. hazard, vulnerability and risk maps).
To realize the IT service platform, combining advanced satellite technologies with existing ground-based data, a particular software has been designed and now is under test. The final result addressed see risk forecasting modelling for the long term and continue monitoring and update of structural stability of the architectural heritage and in particular of historical centers affected by geo-hazards.
General inspection on the selected test sites have been realized in the first year of the project, with visual inspection and selection of buildings for the structural stability model. As regards the test sites selection, the choice has been carried out basing on the cultural heritage interest and on the dimension of the urban centers. This latter has been selected as a relatively medium-small dimension (i.e. a village), in order to represent all the three countries involved in the project, three case studies of Rieti (Italy), Nafplion (Greece) and Strovolos (Cyprus) have been identified among several other proposed sites, as they show a typical and similar urban layout.
Actually is under process the introduction of the new site of historical centre of Rethymno (Crete).

The selection of satellite data to be used was defined during the first year of project, with particular regards to Synthetic Aperture Radar (SAR) sensor for the SAR Interferometry (InSAR) analysis.
The results of InSAR analysis will be provided in shapefile format, with a similar scale (color bar) in order to be compared easily and to be integrated into the further steps of the project.
Photogrammetric image analysis of Nafplion, with the aim of estimate the geometrical characteristics of the buildings selected for assessing the structural vulnerability, is in progress.
In-situ monitoring systems (already present at the selected studied areas) is being evaluated, according to the occurrence or lack of active monitoring systems already installed. Execution of seismic ambient noise measurement in Strovolos, Rieti and Nafplion (WP1) have been realized.
As regards geophysical methods (Seismic Ambient Noise measurements), the geophysical field survey started for the Strovolos case study in June 2019, in order to retrieve information on the subsoil setting of the study area. Moreover, geophysical methods (in particular, Seismic Ambient Noise measurements) have been introduced among the monitoring methodologies, in order to shed light on the subsoil setting and to estimate the local seismic response.
Good amount of work was allocated to the analysis of Land movements monitoring methods, analysis and techniques for the realization of a risk model and software kit. The geotechnical assessment and seismic analysis earthquake scenarios of the case study areas, Nafplio, Strovolos and Rieti, has been completed. The Structural Damage assessment and risk map software kit is in progress, but with at least 6 months delay. The activities related to Structural stability was concentrated on improvement of the MATLAB code, derivation of fragility curves for generic building and available building data, release of the draft manual of the MATLAB code and more recently we concentrated on analytical fragility curve for a model of adobe building.
The development of BIM models for each structure is under investigation by FU. This work was not part of the grant agreement. However, the consortium partners decided that it will provide additional value to the proposed work and for this reason it has been included.
"Thanks to the synergy of specific knowledges (geotechnical, structural stability, remote sensing, in-situ monitoring systems and Information Technology), STABLE aims to build a Thematic Platform for CH, an interactive and continuously updated instrument for the safeguard, monitoring and managing of CH from environmental hazards.
At the end of the project the STABLE system platform, integrating geotechnical, civil engineering and different monitoring techniques ia a GIS system, will be at the forefront of the technology and beyond the current state-of-art. In fact current techniques address the temathic as ""separate"" areas never combining and integrating all the available different techniques in a coherent and potentially scaleable system.

The socio economic impact is considered relevant by addressing:
a) Innovative schemes of management and protection of cultural heritage based on preventive maintenance. STABLE aims to enable the systematic use of preventive maintenance approach as opposed to the emergency restoration approach;
b) Contribution to the development of risk mitigation strategy for protection schemes of cultural heritage. STABLE will enable future development of ad-hoc risk mitigation strategies for eartquake threats, developing innovative alert risk models applicable for preventive maintenance as well as for reduction of casualties in case of severe events impacting on inhabited city centres;
c) Creation of a favourable economic impact for tourism. The strengthening of the protection of cultural heritage of the selected case studies and their enhancement will help to determine a favourable economic impact on tourism with the potential to create new jobs;
d) The thematic platform, currently under development within the project, has the potential to create new business and job opportunities as part of innovative EO downstream services, for the protection of CH at European scale."
Seismic Survey Campaign in Nafplio - July 2020
Field Trip - Nicosia - June 2019
Project Annual Meeting - Athens - November 2019
Tour in Nafpio, November 2019
Summer School Rethymno - September 2020
Seismic Survey Campaign in Nafplio - July 2020
Seismic Survey campaign in Strovolos, Nicosia - June 2019
1st Summer School Nicosia - June 2019
Seismic Survey Campaign in Nafplio - July 2020
Mid Term Meeting, Rethymno - September 2020