Periodic Reporting for period 1 - HOLAHERIS (A holistic structural analysis method for cultural heritage structures conservation)
Reporting period: 2022-01-10 to 2024-01-09
The HOLAHERIS project proposes a holistic structural analysis method for cultural heritage structures conservation, introducing an original multidisciplinary framework that will make the safeguard and protection of these structures less expensive, faster and more reliable than state-of-the-art approaches. HOLAHERIS combines various scientific disciplines in a multidisciplinary framework and introduces several scientific novelties: innovative integration of 3D documentation data for rapid numerical model generation of cultural heritage structures, innovative integration of structural health monitoring and numerical modelling for real-time decision-making in cultural heritage structures conservation, sub-modelling-based stochastic dynamic analysis for seismic assessment of cultural heritage structures, modelling environmental deterioration in historic and composite building materials.
Within the HOLAHERIS project, an innovative integration of 3D documentation data for rapid numerical model generation of cultural heritage structures, also based on an automatic multi-leaf non-periodic 3D block-by-block pattern generator, is developed to extend the usability of point cloud-to-numerical model procedures also for non-comprehensive point cloud data and to extend the usability of accurate block-based models also to multi-leaf and non-periodic masonries.
Moreover, an innovative integration of structural health monitoring and numerical modelling for decision-making in cultural heritage structures conservation is pursued by the development of a numerical modelling-based damage diagnostics methodology, as well as by the development of an automatic tool for the real-time prediction of residual displacement capacity in damaged masonry walls based on machine learning and numerical modelling, so contributing to damage prognosis (Level IV of structural health monitoring) in masonry and cultural heritage structures.
Furthermore, a two-step sub-modelling procedure which couples limit and pushover analyses considering the actual masonry pattern is developed to reduce the computational demand in accurate seismic analysis of cultural heritage structures. Additionally, an efficient computational approach based on numerical dissipation is proposed to simulate the dynamic behavior of rocking blocks.
Finally, advancements are carried out in modelling environmental deterioration in historic and composite building materials, where a micro-mechanics-based numerical model is developed to reproduce damage due to salt crystallization pressure in the pores of the material.
Moreover, an innovative integration of structural health monitoring and numerical modelling for decision-making in cultural heritage structures conservation is pursued by the development of a numerical modelling-based damage diagnostics methodology, as well as by the development of an automatic tool for the real-time prediction of residual displacement capacity in damaged masonry walls based on machine learning and numerical modelling, so contributing to damage prognosis (Level IV of structural health monitoring) in masonry and cultural heritage structures.
Furthermore, a two-step sub-modelling procedure which couples limit and pushover analyses considering the actual masonry pattern is developed to reduce the computational demand in accurate seismic analysis of cultural heritage structures. Additionally, an efficient computational approach based on numerical dissipation is proposed to simulate the dynamic behavior of rocking blocks.
Finally, advancements are carried out in modelling environmental deterioration in historic and composite building materials, where a micro-mechanics-based numerical model is developed to reproduce damage due to salt crystallization pressure in the pores of the material.
The HOLAHERIS objectives represent original advancements in scientific research. The extension of point cloud-to-numerical model procedures also to non-comprehensive point cloud input data (i.e. the most common circumstance), thanks to its pioneering integration with immersive frameworks and to automatic solid model block filling, represents a novelty. The novel integration of structural health monitoring and numerical modelling to create a decision-making framework for cultural heritage structures conservation guarantees safeguard policies and real-time smart management for asset owners. The accurate and efficient block-based dynamic simulations of masonry structures accounting for rocking dissipative phenomena, as well as the original sub-modelling procedure, represent significant advances in the state-of-the-art and will keep affordable the computational demand for large-scale structures, also in the dynamic regime. The development of micro-mechanics-based numerical models to reproduce damage due to salt crystallization pressure in the pores of the material represents a novelty in the field of poromechanics, and will allow reliable numerical predictions of material ageing in historic and composite building materials.
These advancements appear strategic for European society, given the large number of cultural heritage structures in Europe constantly threatened by earthquakes, soil settlements and material deterioration. Furthermore, the accurate structural assessment of cultural heritage structures is going to minimize the cost and the magnitude of the strengthening interventions, maximizing the authenticity of European heritage, and contributing to sustainability and resilience of built environment. The new structural analysis method developed in HOLAHERIS for cultural heritage structures conservation will be made available to the wider public of European practitioners and conservation professionals. Since the method will not be specifically based on software packages but on a sequence of operations and data management, its principle can be followed by a large audience.
These advancements appear strategic for European society, given the large number of cultural heritage structures in Europe constantly threatened by earthquakes, soil settlements and material deterioration. Furthermore, the accurate structural assessment of cultural heritage structures is going to minimize the cost and the magnitude of the strengthening interventions, maximizing the authenticity of European heritage, and contributing to sustainability and resilience of built environment. The new structural analysis method developed in HOLAHERIS for cultural heritage structures conservation will be made available to the wider public of European practitioners and conservation professionals. Since the method will not be specifically based on software packages but on a sequence of operations and data management, its principle can be followed by a large audience.